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The Colors of Uno f/7.7 Series III
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PostPosted: Thu Mar 20, 2008 5:37 pm    Post subject: The Colors of Uno f/7.7 Series III Reply with quote
Today there was sunshine, but the temperature was -1C and there was some wind so my fingers were frozen, the bellows stiffened, and focusing was rather difficult. However, I got some shooting done. It will take some time to prepare a proper page, but in the meantime here are some photos. I haven't made any adjustments except some very slight sharpening after down-sampling, so these are the results at the LightZone 350D default settings.

The sharpness is quite adequate, more about that later on. The white cathedral is, of course, slightly difficult for an uncoated lens, There is no CA, the bokeh could hardly be any better, and the colors... well, they aren't quite like those of a modern MC lens, but...



















Now remember: this is an old, very simple and cheap lens. The very economical optical design is from before 1903, and this specific lens was made sometime between 1903 and 1926 (?). Here it is, glued to inside a short M42 macro extension tube for bellows mounting:



PostPosted: Thu Mar 20, 2008 5:45 pm    Post subject: Reply with quote
Beautiful colors! Nice samples I like so much the blue sky and white cathedral together.


PostPosted: Thu Mar 20, 2008 5:52 pm    Post subject: Reply with quote
Very nice - great colours and bokeh and the contrast is fine in tese shots


PostPosted: Thu Mar 20, 2008 6:20 pm    Post subject: Reply with quote
FANTASTIC!
What should I add more? Amazing, amazing results!!
Marvelous bokeh and excellent detail.
The last photo is exceptional.

-


PostPosted: Thu Mar 20, 2008 6:52 pm    Post subject: Reply with quote
superb colors!


PostPosted: Thu Mar 20, 2008 11:15 pm    Post subject: Reply with quote
Very nice transitions from in focus to oof; surprisingly good contrast.

Looks like this lens has a huge register distance, what was it originally intended for?


PostPosted: Fri Mar 21, 2008 8:04 am    Post subject: Reply with quote
ChrisLilley wrote:
Very nice transitions from in focus to oof;


A small aperture (f/7.7) helps here.

Quote:
surprisingly good contrast.


An Uno has only 4 air-to-glass surfaces, the minimum number for a reasonably well corrected lens. Triplets and Tessars have 6 surfaces, and most modern designs have even more, which makes MC a must.

Quote:
Looks like this lens has a huge register distance, what was it originally intended for?


It doesn't have a register distance, it is just a f/7.7 5 inch lens head, here mounted on a bellows. I don't know which camera it was intended for, and this focal length of the f/7.7 Series III Uno isn't mentioned even in the Vade-Mecum. The lens looks quite pristine, and it has no aperture or focusing mechanism. Probably it was used or was intended to be used in an SLR like Butcher's Reflex Carbine 6x9 SLR, which used a f/7.7 4.25 inch Uno, see http://www.antiques.dk.com/detail.php/Collectables%20and%20Miscellaneous/Cameras/20th%20Century%20and%2035mm/Miscellaneous/10435434.
There probably is a moving inner panel to which the lens flange is fixed.

Veijo


PostPosted: Fri Mar 21, 2008 8:28 am    Post subject: Reply with quote
Here are two examples of the resolution, first a crop from the Cathedral photo:


The whole frame is at http://galactinus.net/vilva/retro/eos350d_uno77_files/u77_8797.jpg Note the total lack of CA. This photo isn't, of course, quite as sharp as e.g. one taken with the 2.8/135 Elmarit-R: http://galactinus.net/vilva/retro/eos350d_elmarit135_files/e135_6703.jpg, but after some rather minimal sharpening there certainly is nothing to complain about:


The whole frame is at http://galactinus.net/vilva/retro/eos350d_uno77_files/u77_8797_sharp.jpg

Then a similar pair from the street scene:


The whole frame is at http://galactinus.net/vilva/retro/eos350d_uno77_files/u77_8828.jpg


The whole frame is at http://galactinus.net/vilva/retro/eos350d_uno77_files/u77_8828_sharp.jpg

Finally a bokeh example from the upper left corner of the street scene, note the highlight bokeh with the center peak surrounded by a trough and a lower intensity ring:



Nice little lens.

Veijo


PostPosted: Sat Mar 22, 2008 10:34 am    Post subject: Re: The Colors of Uno Reply with quote
vilva wrote:


This looks so good!

I just love the second shot. It is always amazing what you can do with these "old" and "cheap" lenses.


PostPosted: Sat Mar 22, 2008 11:39 am    Post subject: Re: The Colors of Uno Reply with quote
LucisPictor wrote:
these "old" and "cheap" lenses.


Well, it is old and even originally cheap. Series III Uno was marketed from 1903 to 1933. In 1933 it had already been obsolete for some time. It usually was the cheapest standard lens offered for some camera model.

Veijo
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