Hi All,
I have today fitted a new focusable eye-piece fresh off the factory
floor. I actually got it from Cuca at 3D World some weeks ago but
haven't had chance to install it. They supplied it to me to solve my
problem of not being able to get critical focus, which I find so
important in portaiture work. It was the first one off the production
line, after the boss decided against sending me a prototype as it was
a bit rough. See it here:

http://tech.ph.groups.yahoo.com/group/MF3D-group/photos/browse/1dda?c=

It had to be a DIY job and I had no instructions with it, but being
an instrument technician this didn't worry me unduly. Disassembly is
done by removing the 8 screws securing the bright metal plate at the
prism bottom, (take care as there are 4 small springs and a ball
under here, dis-assemble carefully over a tray to catch them, take
note where they come from). Then another six screws in the plastic
housing, 4 which were hidden under the plate, and 2 more under the
view port. The top of the prism now just lifts off with a little help
from a flat screwdriver. Be carefull removing the screws from the
bright metal plate. I had one that was too tight and the screwdriver
stripped the flutes out of the all-too-weak metal of the screw. I had
to drill out the head of the tiny screw, actually made easier by the
very same soft metal.
Next is to remove the original viewing lens by removing the 4 screws
on the inside, see photos. The new focuser simply pushes into the
same hole, fit the new metal mask supplied with it. The existing
screws are too long now and about 1.25mm has to be ground off the
length so the screws don't go right through into the rotating part of
the focuser. Once these four screws are in and tight, check the ring
rotates freely, then re-assemble the prism in the reverse order.

Conclusion: This is not the large adjuster of diopters that I was
expecting. It does the job for me, being only slightly short sighted
12 years after having Laser surgery. This unit will not allow
spectacle wearers to view without them, but rather, I find, to adjust
for a slight short-fall in your sight with or without glasses.
Contact 3D World for details on obtaining one if interested.
I am under the impression that new cameras off the line will come
with this as standard.

Happy 3D-ing, Peter

Peter,

A focusing eyepiece was offered a year ago by 3DWorld as well. From
the feedback I got it was not a hit, as the small window severely
limited viewing.

Are you sure it will now be standard? Why could you not use the
original design? The first models had an incorrect diopter value,
which I am assuming was corrected in later models.

Sam

--- In MF3D-group@yahoogroups.com, "Peter Thomson" wrote:
>
> Hi All,
> I have today fitted a new focusable eye-piece fresh off the factory
> floor. I actually got it from Cuca at 3D World some weeks ago but
> haven't had chance to install it. They supplied it to me to solve my
> problem of not being able to get critical focus, which I find so
> important in portaiture work. It was the first one off the production
> line, after the boss decided against sending me a prototype as it was
> a bit rough. See it here:
>
> http://tech.ph.groups.yahoo.com/group/MF3D-group/photos/browse/1dda?c=
>
> It had to be a DIY job and I had no instructions with it, but being
> an instrument technician this didn't worry me unduly. Disassembly is
> done by removing the 8 screws securing the bright metal plate at the
> prism bottom, (take care as there are 4 small springs and a ball
> under here, dis-assemble carefully over a tray to catch them, take
> note where they come from). Then another six screws in the plastic
> housing, 4 which were hidden under the plate, and 2 more under the
> view port. The top of the prism now just lifts off with a little help
> from a flat screwdriver. Be carefull removing the screws from the
> bright metal plate. I had one that was too tight and the screwdriver
> stripped the flutes out of the all-too-weak metal of the screw. I had
> to drill out the head of the tiny screw, actually made easier by the
> very same soft metal.
> Next is to remove the original viewing lens by removing the 4 screws
> on the inside, see photos. The new focuser simply pushes into the
> same hole, fit the new metal mask supplied with it. The existing
> screws are too long now and about 1.25mm has to be ground off the
> length so the screws don't go right through into the rotating part of
> the focuser. Once these four screws are in and tight, check the ring
> rotates freely, then re-assemble the prism in the reverse order.
>
> Conclusion: This is not the large adjuster of diopters that I was
> expecting. It does the job for me, being only slightly short sighted
> 12 years after having Laser surgery. This unit will not allow
> spectacle wearers to view without them, but rather, I find, to adjust
> for a slight short-fall in your sight with or without glasses.
> Contact 3D World for details on obtaining one if interested.
> I am under the impression that new cameras off the line will come
> with this as standard.
>
> Happy 3D-ing, Peter
>

Hi Sam,
This was the email I got from Cuca:-

>Hi Peter, good news!
>We are going to send you a new adjustable eyepiece set for the
>viewfinder. Where should we ship to this time?

>Actually, we have finished the design about a week ago. And we got
>one rough one done, but they refused to send out that one because
>they thought it was not a formal product, so they told me to wait
>till they produce a group of them. For a person to DIY one piece of
>it, it might be simple and sooner, but when it is put on the
>production line, it becomes complicated and time consuming. Hope you
>understand what I'm saying. Anyway, sorry to keep you waiting!

>Best Regards,

>Cuca

So as you can see, this is a NEW unit and this talk of the production
line is what I inferred to mean it will become standard. This finder
in NO WAY limits the view. The image is just as big as before, with a
large occular providing unobstructed view. When turning the adjuster
ring, an internal lens is moved in or out.

Hope this clears the confusion.

Peter

--- In MF3D-group@yahoogroups.com, "Sam Smith" wrote:
>
> Peter,
>
> A focusing eyepiece was offered a year ago by 3DWorld as well. From
> the feedback I got it was not a hit, as the small window severely
> limited viewing.
>
> Are you sure it will now be standard? Why could you not use the
> original design? The first models had an incorrect diopter value,
> which I am assuming was corrected in later models.
>
> Sam
>
> --- In MF3D-group@yahoogroups.com, "Peter Thomson"
wrote:
> >
> > Hi All,
> > I have today fitted a new focusable eye-piece fresh off the
factory
> > floor. I actually got it from Cuca at 3D World some weeks ago but
> > haven't had chance to install it. They supplied it to me to solve
my
> > problem of not being able to get critical focus, which I find so
> > important in portaiture work. It was the first one off the
production
> > line, after the boss decided against sending me a prototype as it
was
> > a bit rough. See it here:
> >
> > http://tech.ph.groups.yahoo.com/group/MF3D-
group/photos/browse/1dda?c=
> >
> > It had to be a DIY job and I had no instructions with it, but
being
> > an instrument technician this didn't worry me unduly. Disassembly
is
> > done by removing the 8 screws securing the bright metal plate at
the
> > prism bottom, (take care as there are 4 small springs and a ball
> > under here, dis-assemble carefully over a tray to catch them,
take
> > note where they come from). Then another six screws in the
plastic
> > housing, 4 which were hidden under the plate, and 2 more under
the
> > view port. The top of the prism now just lifts off with a little
help
> > from a flat screwdriver. Be carefull removing the screws from the
> > bright metal plate. I had one that was too tight and the
screwdriver
> > stripped the flutes out of the all-too-weak metal of the screw. I
had
> > to drill out the head of the tiny screw, actually made easier by
the
> > very same soft metal.
> > Next is to remove the original viewing lens by removing the 4
screws
> > on the inside, see photos. The new focuser simply pushes into the
> > same hole, fit the new metal mask supplied with it. The existing
> > screws are too long now and about 1.25mm has to be ground off the
> > length so the screws don't go right through into the rotating
part of
> > the focuser. Once these four screws are in and tight, check the
ring
> > rotates freely, then re-assemble the prism in the reverse order.
> >
> > Conclusion: This is not the large adjuster of diopters that I was
> > expecting. It does the job for me, being only slightly short
sighted
> > 12 years after having Laser surgery. This unit will not allow
> > spectacle wearers to view without them, but rather, I find, to
adjust
> > for a slight short-fall in your sight with or without glasses.
> > Contact 3D World for details on obtaining one if interested.
> > I am under the impression that new cameras off the line will come
> > with this as standard.
> >
> > Happy 3D-ing, Peter
> >
>

Sam Smith writes:

> A focusing eyepiece was offered a year ago by 3DWorld as well. From
> the feedback I got it was not a hit, as the small window severely
> limited viewing

My TL120 is the "mid-model" and has the adjustable diopter eyepiece and I
like it a lot. I can see the whole ground glass image and I can use it
with my eyeglasses. Not sure what viewing is limited.

Thanks,

David W. Kesner

Thanks for clarifying this Peter. Yes this does sound like a different
version than before, as the prior was only about 12mm dia and you
couldn't see the corners.

Great news that the problem is solved.

Sam