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Subject: Sputnik shutter adjustment
Date: 2018-06-29 04:46:11
From: jeppeln
Hello all,

I'm wondering if the Sputnik shutter speed is continuous or machiened to sit in i certain positions?

The reason I'm asking is that when setting my Sputnik's shutter to 1/100 (top speed of this model) it actually only delivers 1/67.
But... when setting the shutter dial, it actually goes a fair bit further than 1/100, so if the shutter is continuous there might be a possibility to shorten the speed a bit.

Also, if this is not possible, does anyone know how to repair/adjust the speeds?
I can't find any information on this, or is it not recommended to tinker with it?
1/67 is quite slow and I'm worried it will affect the images, or are my worries unjustified?
If so, can you recommend a technique to over come this problem?


All the best,
Jesper
Subject: Re: Sputnik shutter adjustment
Date: 2018-06-29 04:59:53
From: George Themelis
I do not know about the Sputnik, I know in the Realist it is not continuous,
it's done in steps.

But I wanted to comment on this:

> when setting my Sputnik's shutter to 1/100 (top speed of this model) it
> actually only delivers 1/67.
[...] 1/67 is quite slow and I'm worried it will affect the images, or are
my worries unjustified?

It is not "quite slow" it is only 1/3 of an f-stop and it is quite normal
for mechanical cameras from the 50s. I see the same thing in the Realists.
The top speeds 1/100 and 1/150 or 1/200 are always slower.

If you know what the speed is, you can take this into account when shooting
(by setting the appropriate aperture) so the exposure is correct. So, it's
not a problem.

For example, if the exposure calls for f16 and 1/100 (sunny day rule when
using 100 ISO film) and you know that the 1/100 is, say, 1/50, then you set
the aperture to f22 and you have the same exposure.

George
Subject: Re: Sputnik shutter adjustment
Date: 2018-06-29 05:01:07
From: Bob Aldridge

I can't answer your question about adjusting the shutter - but it's not the most robust of mechanisms, so trying to get it up to full speed just might reduce reliability...

As to 1/67 affecting your images, I suspect that you might be thinking about the possibility of "camera shake"... My advice with MF cameras is to get yourself a sturdy tripod and cable release. Not only will this obviate the camera shake possibilities, but it also helps you to concentrate on your composition! You'll find yourself taking that little bit longer over shots so that you frame it as well as possible - as well as noticing that piece of litter in the foreground!

I was once asked if MF photography wasn't expensive. My answer was that it really isn't any more costly than 35mm shooting. Because you can end up with six "keepers" from a roll of 120 film and, often, less than six "keepers" from a roll of 35mm film where the psychology is that you have lots of exposures so you can just "hosepipe" around...

Bob Aldridge


On 29/06/2018 11:46, jeppeln@yahoo.com [MF3D-group] wrote:
 

Hello all,

I'm wondering if the Sputnik shutter speed is continuous or machiened to sit in i certain positions?

The reason I'm asking is that when setting my Sputnik's shutter to 1/100 (top speed of this model) it actually only delivers 1/67.
But... when setting the shutter dial, it actually goes a fair bit further than 1/100, so if the shutter is continuous there might be a possibility to shorten the speed a bit.

Also, if this is not possible, does anyone know how to repair/adjust the speeds?
I can't find any information on this, or is it not recommended to tinker with it?
1/67 is quite slow and I'm worried it will affect the images, or are my worries unjustified?
If so, can you recommend a technique to over come this problem?

All the best,
Jesper


Subject: Sv: Re: [MF3D-group] Sputnik shutter adjustment
Date: 2018-06-29 07:05:56
From: Jesper BE
Thanks George!

On the Realist I get different levels of resistance when dialing the different shutter settings, but on the Sputnik it feels very smooth.
So I was thinking maybe it was continuous. : )


Skickat från Yahoo Mail för iPhone

Den fredag, juni 29, 2018, 12:59, skrev 'George Themelis' gathemelis@gmail.com [MF3D-group] :

 

I do not know about the Sputnik, I know in the Realist it is not continuous,
it's done in steps.

But I wanted to comment on this:

> when setting my Sputnik's shutter to 1/100 (top speed of this model) it
> actually only delivers 1/67.
[...] 1/67 is quite slow and I'm worried it will affect the images, or are
my worries unjustified?

It is not "quite slow" it is only 1/3 of an f-stop and it is quite normal
for mechanical cameras from the 50s. I see the same thing in the Realists.
The top speeds 1/100 and 1/150 or 1/200 are always slower.

If you know what the speed is, you can take this into account when shooting
(by setting the appropriate aperture) so the exposure is correct. So, it's
not a problem.

For example, if the exposure calls for f16 and 1/100 (sunny day rule when
using 100 ISO film) and you know that the 1/100 is, say, 1/50, then you set
the aperture to f22 and you have the same exposure.

George

Subject: Sv: Re: [MF3D-group] Sputnik shutter adjustment
Date: 2018-06-29 07:10:50
From: Jesper BE
Hi Bob,

Thanks!
That's a good point, that we are more careful when shooting MF.
Though I hope to get more than six usable pairs out of a Realist, just sent off my first 36 roll to the lab, so maybe I'll have to eat my hat up (laughing).



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Den fredag, juni 29, 2018, 13:00, skrev Bob Aldridge Bob@Stereoscopy.net [MF3D-group] :

 

I can't answer your question about adjusting the shutter - but it's not the most robust of mechanisms, so trying to get it up to full speed just might reduce reliability...

As to 1/67 affecting your images, I suspect that you might be thinking about the possibility of "camera shake"... My advice with MF cameras is to get yourself a sturdy tripod and cable release. Not only will this obviate the camera shake possibilities, but it also helps you to concentrate on your composition! You'll find yourself taking that little bit longer over shots so that you frame it as well as possible - as well as noticing that piece of litter in the foreground!

I was once asked if MF photography wasn't expensive. My answer was that it really isn't any more costly than 35mm shooting. Because you can end up with six "keepers" from a roll of 120 film and, often, less than six "keepers" from a roll of 35mm film where the psychology is that you have lots of exposures so you can just "hosepipe" around...

Bob Aldridge


On 29/06/2018 11:46, jeppeln@yahoo.com [MF3D-group] wrote:
 

Hello all,

I'm wondering if the Sputnik shutter speed is continuous or machiened to sit in i certain positions?

The reason I'm asking is that when setting my Sputnik's shutter to 1/100 (top speed of this model) it actually only delivers 1/67.
But... when setting the shutter dial, it actually goes a fair bit further than 1/100, so if the shutter is continuous there might be a possibility to shorten the speed a bit.

Also, if this is not possible, does anyone know how to repair/adjust the speeds?
I can't find any information on this, or is it not recommended to tinker with it?
1/67 is quite slow and I'm worried it will affect the images, or are my worries unjustified?
If so, can you recommend a technique to over come this problem?

All the best,
Jesper


Subject: Re: Sv: Re: [MF3D-group] Sputnik shutter adjustment
Date: 2018-06-29 07:21:06
From: George Themelis
> On the Realist I get different levels of resistance when dialing the
> different shutter settings, but on the Sputnik it feels very smooth. So I
> was thinking maybe it was continuous. : )

On the Realist there is really only one point of resistance, going over the
1/25 speed. The rest are smooth.

Sounds like you have access to a shutter speed measuring device, you can try
measuring between speeds in the Sputnik and see what happens.

George
Subject: Sv: Re: Sv: Re: [MF3D-group] Sputnik shutter adjustment
Date: 2018-06-29 09:08:27
From: Jesper BE
Sadly I don't have access to a shutter timing device. The times are written in the camera with a sticker. I did a very rough test by filming it with a high speed camera which suggested the 1/67 to be more likely than 1/100.
That's all I got.


Skickat från Yahoo Mail för iPhone

Den fredag, juni 29, 2018, 15:14, skrev 'George Themelis' gathemelis@gmail.com [MF3D-group] :

 

> On the Realist I get different levels of resistance when dialing the
> different shutter settings, but on the Sputnik it feels very smooth. So I
> was thinking maybe it was continuous. : )

On the Realist there is really only one point of resistance, going over the
1/25 speed. The rest are smooth.

Sounds like you have access to a shutter speed measuring device, you can try
measuring between speeds in the Sputnik and see what happens.

George

Subject: Re: Sv: Re: Sv: Re: [MF3D-group] Sputnik shutter adjustment
Date: 2018-06-29 09:50:49
From: Geoffrey S. Waldo
Of you have a cell phone with a high speed video option you can image a bright light source through the shutter and count the frames with light. Needs to be an incandescent light, something that doesn’t flicker at 60hz

There is an app that listens to the sound of the shutter mechanism to estimate timing as well
Geoff 

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Residential Mailing Address 
(please use this as the default unless otherwise advised):

Geoffrey S. Waldo

----------
Consulting:
**Protein Solubility, Folding, Engineering, & Detection**

----------
Work Contact Information:
Geoffrey S. Waldo, PhD
Mail Stop M888
Los Alamos National Laboratory
Los Alamos, NM 87545

Tel:  505-667-8161                 email: waldo@LANL.gov
Fax: 505-665-3024
Cell: 505-204-6979


Los Alamos Fluorescent Proteins Website: http://www.lanl.gov/projects/gfp/
•Superfolder, Folding Reporter, Split Proteins
•Tools for engineering protein folding, stability, and solubility
•Protein interactions, tagging, and detection

ISFI Integrated Center for Structure and Function Innovation web site:http://techcenter.mbi.ucla.edu

On Jun 29, 2018, at 9:08 AM, Jesper BE jeppeln@yahoo.com [MF3D-group] <MF3D-group@yahoogroups.com> wrote:

 

Sadly I don't have access to a shutter timing device. The times are written in the camera with a sticker. I did a very rough test by filming it with a high speed camera which suggested the 1/67 to be more likely than 1/100.

That's all I got.


Skickat från Yahoo Mail för iPhone

Den fredag, juni 29, 2018, 15:14, skrev 'George Themelis' gathemelis@gmail.com [MF3D-group] <MF3D-group@yahoogroups.com>:

 

> On the Realist I get different levels of resistance when dialing the
> different shutter settings, but on the Sputnik it feels very smooth. So I
> was thinking maybe it was continuous. : )

On the Realist there is really only one point of resistance, going over the
1/25 speed. The rest are smooth.

Sounds like you have access to a shutter speed measuring device, you can try
measuring between speeds in the Sputnik and see what happens.

George

Subject: Sv: Re: Sv: Re: Sv: Re: [MF3D-group] Sputnik shutter adjustment
Date: 2018-06-29 11:15:11
From: Jesper BE
Hi Geoffrey,

Thanks!! I downloaded the app and will try it out this weekend. It seems to be 100 % free!

For other people interested, the app is called:
Shutter-Speed
And is done by Lukas Fritz.




Skickat från Yahoo Mail för iPhone

Den fredag, juni 29, 2018, 17:50, skrev 'Geoffrey S. Waldo' gfpguy1@gmail.com [MF3D-group] :

 

Of you have a cell phone with a high speed video option you can image a bright light source through the shutter and count the frames with light. Needs to be an incandescent light, something that doesn’t flicker at 60hz


There is an app that listens to the sound of the shutter mechanism to estimate timing as well
Geoff 

Sent from my iPhone
-----------------------------------------------------------------
My personal contact information: 



Residential Mailing Address 
(please use this as the default unless otherwise advised):

Geoffrey S. Waldo

----------
Consulting:
**Protein Solubility, Folding, Engineering, & Detection**

----------
Work Contact Information:
Geoffrey S. Waldo, PhD
Mail Stop M888
Los Alamos National Laboratory
Los Alamos, NM 87545

Tel:  505-667-8161                 email: waldo@LANL.gov
Fax: 505-665-3024
Cell: 505-204-6979


Los Alamos Fluorescent Proteins Website: http://www.lanl.gov/projects/gfp/
•Superfolder, Folding Reporter, Split Proteins
•Tools for engineering protein folding, stability, and solubility
•Protein interactions, tagging, and detection

ISFI Integrated Center for Structure and Function Innovation web site:http://techcenter.mbi.ucla.edu

On Jun 29, 2018, at 9:08 AM, Jesper BE jeppeln@yahoo.com [MF3D-group] <MF3D-group@yahoogroups.com> wrote:

 

Sadly I don't have access to a shutter timing device. The times are written in the camera with a sticker. I did a very rough test by filming it with a high speed camera which suggested the 1/67 to be more likely than 1/100.

That's all I got.


Skickat från Yahoo Mail för iPhone

Den fredag, juni 29, 2018, 15:14, skrev 'George Themelis' gathemelis@gmail.com [MF3D-group] <MF3D-group@yahoogroups.com>:

 

> On the Realist I get different levels of resistance when dialing the
> different shutter settings, but on the Sputnik it feels very smooth. So I
> was thinking maybe it was continuous. : )

On the Realist there is really only one point of resistance, going over the
1/25 speed. The rest are smooth.

Sounds like you have access to a shutter speed measuring device, you can try
measuring between speeds in the Sputnik and see what happens.

George

Subject: Re: Sv: Re: Sv: Re: [MF3D-group] Sputnik shutter adjustment
Date: 2018-06-29 11:27:54
From: geoffrey waldo
That’s the one! It gives the sound profile, one has to figure out which spikes correspond to shutter open and shutter closed. A well adjusted shutter should have clean spikes in the sound profile 

Sent from my iPhone
-----------------------------------------------------------------
My personal contact information: 



Residential Mailing Address 
(please use this as the default unless otherwise advised):

Geoffrey S. Waldo

----------
Consulting:
**Protein Solubility, Folding, Engineering, & Detection**

----------
Work Contact Information:
Geoffrey S. Waldo, PhD
Mail Stop M888
Los Alamos National Laboratory
Los Alamos, NM 87545

Tel:  505-667-8161                 email: waldo@LANL.gov
Fax: 505-665-3024
Cell: 505-204-6979


Los Alamos Fluorescent Proteins Website: http://www.lanl.gov/projects/gfp/
•Superfolder, Folding Reporter, Split Proteins
•Tools for engineering protein folding, stability, and solubility
•Protein interactions, tagging, and detection

ISFI Integrated Center for Structure and Function Innovation web site:http://techcenter.mbi.ucla.edu

On Jun 29, 2018, at 9:50 AM, 'Geoffrey S. Waldo' gfpguy1@gmail.com [MF3D-group] <MF3D-group@yahoogroups.com> wrote:

 

Of you have a cell phone with a high speed video option you can image a bright light source through the shutter and count the frames with light. Needs to be an incandescent light, something that doesn’t flicker at 60hz


There is an app that listens to the sound of the shutter mechanism to estimate timing as well
Geoff 

Sent from my iPhone
-----------------------------------------------------------------
My personal contact information: 



Residential Mailing Address 
(please use this as the default unless otherwise advised):

Geoffrey S. Waldo

----------
Consulting:
**Protein Solubility, Folding, Engineering, & Detection**

----------
Work Contact Information:
Geoffrey S. Waldo, PhD
Mail Stop M888
Los Alamos National Laboratory
Los Alamos, NM 87545

Tel:  505-667-8161                 email: waldo@LANL.gov
Fax: 505-665-3024
Cell: 505-204-6979


Los Alamos Fluorescent Proteins Website: http://www.lanl.gov/projects/gfp/
•Superfolder, Folding Reporter, Split Proteins
•Tools for engineering protein folding, stability, and solubility
•Protein interactions, tagging, and detection

ISFI Integrated Center for Structure and Function Innovation web site:http://techcenter.mbi.ucla.edu

On Jun 29, 2018, at 9:08 AM, Jesper BE jeppeln@yahoo.com [MF3D-group] <MF3D-group@yahoogroups.com> wrote:

 

Sadly I don't have access to a shutter timing device. The times are written in the camera with a sticker. I did a very rough test by filming it with a high speed camera which suggested the 1/67 to be more likely than 1/100.

That's all I got.


Skickat från Yahoo Mail för iPhone

Den fredag, juni 29, 2018, 15:14, skrev 'George Themelis' gathemelis@gmail.com [MF3D-group] <MF3D-group@yahoogroups.com>:

 

> On the Realist I get different levels of resistance when dialing the
> different shutter settings, but on the Sputnik it feels very smooth. So I
> was thinking maybe it was continuous. : )

On the Realist there is really only one point of resistance, going over the
1/25 speed. The rest are smooth.

Sounds like you have access to a shutter speed measuring device, you can try
measuring between speeds in the Sputnik and see what happens.

George

Subject: Sv: Re: Sv: Re: Sv: Re: [MF3D-group] Sputnik shutter adjustment
Date: 2018-06-29 12:52:23
From: Jesper BE
Perfect! I'm excited to test it out. : )
Thanks!!


Skickat från Yahoo Mail för iPhone

Den fredag, juni 29, 2018, 19:23, skrev geoffrey waldo gfpguy2@yahoo.com [MF3D-group] :

 

That’s the one! It gives the sound profile, one has to figure out which spikes correspond to shutter open and shutter closed. A well adjusted shutter should have clean spikes in the sound profile 

Sent from my iPhone
-----------------------------------------------------------------
My personal contact information: 



Residential Mailing Address 
(please use this as the default unless otherwise advised):

Geoffrey S. Waldo

----------
Consulting:
**Protein Solubility, Folding, Engineering, & Detection**

----------
Work Contact Information:
Geoffrey S. Waldo, PhD
Mail Stop M888
Los Alamos National Laboratory
Los Alamos, NM 87545

Tel:  505-667-8161                 email: waldo@LANL.gov
Fax: 505-665-3024
Cell: 505-204-6979


Los Alamos Fluorescent Proteins Website: http://www.lanl.gov/projects/gfp/
•Superfolder, Folding Reporter, Split Proteins
•Tools for engineering protein folding, stability, and solubility
•Protein interactions, tagging, and detection

ISFI Integrated Center for Structure and Function Innovation web site:http://techcenter.mbi.ucla.edu

On Jun 29, 2018, at 9:50 AM, 'Geoffrey S. Waldo' gfpguy1@gmail.com [MF3D-group] <MF3D-group@yahoogroups.com> wrote:

 

Of you have a cell phone with a high speed video option you can image a bright light source through the shutter and count the frames with light. Needs to be an incandescent light, something that doesn’t flicker at 60hz


There is an app that listens to the sound of the shutter mechanism to estimate timing as well
Geoff 

Sent from my iPhone
-----------------------------------------------------------------
My personal contact information: 



Residential Mailing Address 
(please use this as the default unless otherwise advised):

Geoffrey S. Waldo

----------
Consulting:
**Protein Solubility, Folding, Engineering, & Detection**

----------
Work Contact Information:
Geoffrey S. Waldo, PhD
Mail Stop M888
Los Alamos National Laboratory
Los Alamos, NM 87545

Tel:  505-667-8161                 email: waldo@LANL.gov
Fax: 505-665-3024
Cell: 505-204-6979


Los Alamos Fluorescent Proteins Website: http://www.lanl.gov/projects/gfp/
•Superfolder, Folding Reporter, Split Proteins
•Tools for engineering protein folding, stability, and solubility
•Protein interactions, tagging, and detection

ISFI Integrated Center for Structure and Function Innovation web site:http://techcenter.mbi.ucla.edu

On Jun 29, 2018, at 9:08 AM, Jesper BE jeppeln@yahoo.com [MF3D-group] <MF3D-group@yahoogroups.com> wrote:

 

Sadly I don't have access to a shutter timing device. The times are written in the camera with a sticker. I did a very rough test by filming it with a high speed camera which suggested the 1/67 to be more likely than 1/100.

That's all I got.


Skickat från Yahoo Mail för iPhone

Den fredag, juni 29, 2018, 15:14, skrev 'George Themelis' gathemelis@gmail.com [MF3D-group] <MF3D-group@yahoogroups.com>:

 

> On the Realist I get different levels of resistance when dialing the
> different shutter settings, but on the Sputnik it feels very smooth. So I
> was thinking maybe it was continuous. : )

On the Realist there is really only one point of resistance, going over the
1/25 speed. The rest are smooth.

Sounds like you have access to a shutter speed measuring device, you can try
measuring between speeds in the Sputnik and see what happens.

George

Subject: Sv: Re: Sv: Re: Sv: Re: [MF3D-group] Sputnik shutter adjustment
Date: 2018-06-29 13:04:45
From: Jesper BE
I just tried it and the shutter speed did not change anything noticably.
According to this app the 1/100 fires at between 1/75 to 1/83 in this short test.
The 1/50 was accurate.

So I couldn't be happier :)

Thanks everyone!


Skickat från Yahoo Mail för iPhone

Den fredag, juni 29, 2018, 19:23, skrev geoffrey waldo gfpguy2@yahoo.com [MF3D-group] :

 

That’s the one! It gives the sound profile, one has to figure out which spikes correspond to shutter open and shutter closed. A well adjusted shutter should have clean spikes in the sound profile 

Sent from my iPhone
-----------------------------------------------------------------
My personal contact information: 



Residential Mailing Address 
(please use this as the default unless otherwise advised):

Geoffrey S. Waldo

----------
Consulting:
**Protein Solubility, Folding, Engineering, & Detection**

----------
Work Contact Information:
Geoffrey S. Waldo, PhD
Mail Stop M888
Los Alamos National Laboratory
Los Alamos, NM 87545

Tel:  505-667-8161                 email: waldo@LANL.gov
Fax: 505-665-3024
Cell: 505-204-6979


Los Alamos Fluorescent Proteins Website: http://www.lanl.gov/projects/gfp/
•Superfolder, Folding Reporter, Split Proteins
•Tools for engineering protein folding, stability, and solubility
•Protein interactions, tagging, and detection

ISFI Integrated Center for Structure and Function Innovation web site:http://techcenter.mbi.ucla.edu

On Jun 29, 2018, at 9:50 AM, 'Geoffrey S. Waldo' gfpguy1@gmail.com [MF3D-group] <MF3D-group@yahoogroups.com> wrote:

 

Of you have a cell phone with a high speed video option you can image a bright light source through the shutter and count the frames with light. Needs to be an incandescent light, something that doesn’t flicker at 60hz


There is an app that listens to the sound of the shutter mechanism to estimate timing as well
Geoff 

Sent from my iPhone
-----------------------------------------------------------------
My personal contact information: 



Residential Mailing Address 
(please use this as the default unless otherwise advised):

Geoffrey S. Waldo

----------
Consulting:
**Protein Solubility, Folding, Engineering, & Detection**

----------
Work Contact Information:
Geoffrey S. Waldo, PhD
Mail Stop M888
Los Alamos National Laboratory
Los Alamos, NM 87545

Tel:  505-667-8161                 email: waldo@LANL.gov
Fax: 505-665-3024
Cell: 505-204-6979


Los Alamos Fluorescent Proteins Website: http://www.lanl.gov/projects/gfp/
•Superfolder, Folding Reporter, Split Proteins
•Tools for engineering protein folding, stability, and solubility
•Protein interactions, tagging, and detection

ISFI Integrated Center for Structure and Function Innovation web site:http://techcenter.mbi.ucla.edu

On Jun 29, 2018, at 9:08 AM, Jesper BE jeppeln@yahoo.com [MF3D-group] <MF3D-group@yahoogroups.com> wrote:

 

Sadly I don't have access to a shutter timing device. The times are written in the camera with a sticker. I did a very rough test by filming it with a high speed camera which suggested the 1/67 to be more likely than 1/100.

That's all I got.


Skickat från Yahoo Mail för iPhone

Den fredag, juni 29, 2018, 15:14, skrev 'George Themelis' gathemelis@gmail.com [MF3D-group] <MF3D-group@yahoogroups.com>:

 

> On the Realist I get different levels of resistance when dialing the
> different shutter settings, but on the Sputnik it feels very smooth. So I
> was thinking maybe it was continuous. : )

On the Realist there is really only one point of resistance, going over the
1/25 speed. The rest are smooth.

Sounds like you have access to a shutter speed measuring device, you can try
measuring between speeds in the Sputnik and see what happens.

George

Subject: Sv: Re: Sv: Re: Sv: Re: [MF3D-group] Sputnik shutter adjustment
Date: 2018-06-29 13:06:22
From: Jesper BE
I mean it didn't change anything noticable from the 1/100 and going the tiny bit beyond 1/100. So I'm guessing the shutter mechanism is not continuous.

: )


Skickat från Yahoo Mail för iPhone

Den fredag, juni 29, 2018, 19:23, skrev geoffrey waldo gfpguy2@yahoo.com [MF3D-group] :

 

That’s the one! It gives the sound profile, one has to figure out which spikes correspond to shutter open and shutter closed. A well adjusted shutter should have clean spikes in the sound profile 

Sent from my iPhone
-----------------------------------------------------------------
My personal contact information: 



Residential Mailing Address 
(please use this as the default unless otherwise advised):

Geoffrey S. Waldo

----------
Consulting:
**Protein Solubility, Folding, Engineering, & Detection**

----------
Work Contact Information:
Geoffrey S. Waldo, PhD
Mail Stop M888
Los Alamos National Laboratory
Los Alamos, NM 87545

Tel:  505-667-8161                 email: waldo@LANL.gov
Fax: 505-665-3024
Cell: 505-204-6979


Los Alamos Fluorescent Proteins Website: http://www.lanl.gov/projects/gfp/
•Superfolder, Folding Reporter, Split Proteins
•Tools for engineering protein folding, stability, and solubility
•Protein interactions, tagging, and detection

ISFI Integrated Center for Structure and Function Innovation web site:http://techcenter.mbi.ucla.edu

On Jun 29, 2018, at 9:50 AM, 'Geoffrey S. Waldo' gfpguy1@gmail.com [MF3D-group] <MF3D-group@yahoogroups.com> wrote:

 

Of you have a cell phone with a high speed video option you can image a bright light source through the shutter and count the frames with light. Needs to be an incandescent light, something that doesn’t flicker at 60hz


There is an app that listens to the sound of the shutter mechanism to estimate timing as well
Geoff 

Sent from my iPhone
-----------------------------------------------------------------
My personal contact information: 



Residential Mailing Address 
(please use this as the default unless otherwise advised):

Geoffrey S. Waldo

----------
Consulting:
**Protein Solubility, Folding, Engineering, & Detection**

----------
Work Contact Information:
Geoffrey S. Waldo, PhD
Mail Stop M888
Los Alamos National Laboratory
Los Alamos, NM 87545

Tel:  505-667-8161                 email: waldo@LANL.gov
Fax: 505-665-3024
Cell: 505-204-6979


Los Alamos Fluorescent Proteins Website: http://www.lanl.gov/projects/gfp/
•Superfolder, Folding Reporter, Split Proteins
•Tools for engineering protein folding, stability, and solubility
•Protein interactions, tagging, and detection

ISFI Integrated Center for Structure and Function Innovation web site:http://techcenter.mbi.ucla.edu

On Jun 29, 2018, at 9:08 AM, Jesper BE jeppeln@yahoo.com [MF3D-group] <MF3D-group@yahoogroups.com> wrote:

 

Sadly I don't have access to a shutter timing device. The times are written in the camera with a sticker. I did a very rough test by filming it with a high speed camera which suggested the 1/67 to be more likely than 1/100.

That's all I got.


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Den fredag, juni 29, 2018, 15:14, skrev 'George Themelis' gathemelis@gmail.com [MF3D-group] <MF3D-group@yahoogroups.com>:

 

> On the Realist I get different levels of resistance when dialing the
> different shutter settings, but on the Sputnik it feels very smooth. So I
> was thinking maybe it was continuous. : )

On the Realist there is really only one point of resistance, going over the
1/25 speed. The rest are smooth.

Sounds like you have access to a shutter speed measuring device, you can try
measuring between speeds in the Sputnik and see what happens.

George

Subject: Re: Sputnik shutter adjustment
Date: 2018-06-30 20:36:58
From: Brian Reynolds
'George Themelis' gathemelis@gmail.com [MF3D-group] wrote:
>
> But I wanted to comment on this:
>
> > when setting my Sputnik's shutter to 1/100 (top speed of this model) it
> > actually only delivers 1/67.
> [...] 1/67 is quite slow and I'm worried it will affect the images, or are
> my worries unjustified?
>
> It is not "quite slow" it is only 1/3 of an f-stop and it is quite normal
> for mechanical cameras from the 50s. I see the same thing in the Realists.
> The top speeds 1/100 and 1/150 or 1/200 are always slower.

1/67 is actually about 2/3 stop slower than 1/100.

> If you know what the speed is, you can take this into account when shooting
> (by setting the appropriate aperture) so the exposure is correct. So, it's
> not a problem.

This is important, and good, advice.

It's not so important to have exact speeds the manufacturer marked on
the camera. If you know the actual speed, and if it is consistent,
then you can get good exposures.

--
Brian Reynolds | "It's just like flying a spaceship.
reynolds@panix.com | You push some buttons and see
https://www.panix.com/~reynolds/ | what happens." -- Zapp Brannigan
NAR# 54438 |