Hi Guys,

The recent discussion on Stereoscopes made me look for my Alan Lewis'
viewers. I found them and put them for sale in ebay. Each auction starts
at $0.01 and has no reserve:

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=370673061518

MagniView Achromatic Ortho Stereoscope By Alan Lewis

I bought this 10 years ago from Jon Golden (3D Concept). I might have used
it for 10 minutes, that's all. I then put it away. This is an interesting
stereoscope. It has interocular adjustment! And comes with two lens panels,
one 140mm FL (shorter than standard Holmes viewers) and one with 85mm FL
lenses (very short!) which are suitable for transparencies too (or small
size stereoviews).

Please look at the pictures and description. Unlike some other products, I
see a weak point on how the lenses are held in place. There is a set screw
for one panel. The left lens fell out. I tightened the screw but you might
considering gluing the lens in place. The lenses in the short FL panel are
only held by hot glue. Well, again, one lens fell out. I recommend using
more glue. Other than that, everything looks fine.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=370671586659

DiamondView Achromatic Stereoscope By Alan Lewis w/custom case

I bought this 10 years ago directly from Alan Lewis. Unlike the units sold
via 3d Concepts, my viewer comes with a custom wooden case which carries the
serial number no. 1! I don't think I ever took this out of its case. I put
it away for 10 years and now it is time to sell it (since I don't work with
stereoviews anyway).

I hope that these fine viewers find a good home :)

George Themelis

On 10/23/2012 6:38 AM, George Themelis wrote:

> The recent discussion on Stereoscopes made me look for my Alan Lewis'
> viewers. I found them and put them for sale in ebay. - snip -

> MagniView Achromatic Ortho Stereoscope By Alan Lewis
> . . . And comes with two lens panels,
> one 140mm FL (shorter than standard Holmes viewers) and one with 85mm FL
> lenses (very short!) which are suitable for transparencies too (or small
> size stereoviews).

George, you had me lol'ing :) My view is that "short"
doesn't start until the focal length is smaller than 70mm
and that 85mm lands firmly in the "normal" range.

That's the great thing about qualitative labels. They mean
so many things to so many people :)

John Thurston
Juneau, Alaska

Yes, short for a pair of lenses found on a stereoscope! After all, this is
a stereoscope, intended to view stereo prints :)

George

Seen, yesterday, on MF 3D:

A description of the Lewis stereoscope.... "and one with 85mm fl
lenses(very short) which are suitable for transparencies or (small size
stereo views)".

John Thurston wrote: "my view is that "short doesn't start until the fl
is smaller than 70mm and that 85mm lands firmly in the "normal range".

The retort from the original email writer was: "After all this is a
stereoscope intended to view stereo prints".

I disagree with the retort, but do agree with John T, as the original
description did say, "...suitable for transparencies or (small size
stereo views)". Small size stereo views are usually shot with the 127
Rolleidoscope type stereo cameras, the resulting image size being about
45mm x 45mm, (an approximately, 1 5/8" square image). Suggesting a
viewer lens fl of less than 70mm is appropriate. I do have a bunch of
small B & W stereo views, (prints), of Germany, made prior to WW II,
which do appear rather smallish in the Lewis Stereoscope, when using the
85mm fl lenses.

The best,

DON.

Am I correct that longer FL viewer lenses realtive to the camera lens FL increases the perception of depth? And the reverse is more immersive?
Thanks,
Steve

Greetings,

I have two complete (10 slides each) sets from 3d World. These have been
discontinued for a year or two now. These are my last two complete sets.
They are female glamour, Chinese style :) (I have scenic slides but not
complete sets, I will be selling these later).

Price is $59.95 each. Links in ebay:

"Beauties/Bikini":
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=221154539441

"Tender Miss":
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=370692122622

Thanks,

George