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Explore the world of vintage lenses through repair notes, real test shots, and detailed archive threads packed with images.

Explore the world of vintage lenses through repair notes, real test shots, and detailed archive threads packed with images.
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Russian Uran-27 100mm/2.5
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Posted: Thu Mar 13, 2014 8:51 pm
Post subject: Russian Uran-27 100mm/2.5
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Posted: Thu Mar 13, 2014 8:51 pm
Post subject: Russian Uran-27 100mm/2.5
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Hello everybody,

I tried today to adapt this aerial photography lens on the A7. Adaptation is not perfect at all (seriously), so I got intern reflexion. I'll try later something more serious, with infiny (it's possible, just need to reduce my "adapter").

Nevertheless, here is the lens (I find it quite beautiful) :



On photohistory.ru, it tells that it has resolution 44/8 (center/border).

Here are 2 samples :

At 5.6 (internal reflexion visible)


At 2.5, crop 33%


More samples to come next days Smile


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Posted: Thu Mar 13, 2014 10:11 pm
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Posted: Thu Mar 13, 2014 10:11 pm
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Thnks for sharing Pierre. Smile

What is the size of this lens ?


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Posted: Thu Mar 13, 2014 10:13 pm
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Posted: Thu Mar 13, 2014 10:13 pm
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Not big (for an aerial lens). Front lens not bigger than Helios-40's one.


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Posted: Thu Mar 13, 2014 10:14 pm
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Posted: Thu Mar 13, 2014 10:14 pm
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I love the haze in the first picture. Great stuff!


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Posted: Thu Mar 13, 2014 10:44 pm
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Posted: Thu Mar 13, 2014 10:44 pm
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strange color shift between these 2 shots , i love first one


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Posted: Thu Mar 13, 2014 10:50 pm
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Posted: Thu Mar 13, 2014 10:50 pm
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First of all, nice lens and samples! Very Happy

The first picture looks like it has some flare Surprised
Second is very nice IMO


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Posted: Thu Mar 13, 2014 11:03 pm
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Posted: Thu Mar 13, 2014 11:03 pm
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Nordentro wrote:
First of all, nice lens and samples! Very Happy

The first picture looks like it has some flare Surprised
Second is very nice IMO


I'm pretty sure flare is due to my crap adaptation. The intern part is very reflective.


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Posted: Sat Mar 15, 2014 7:26 pm
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Posted: Sat Mar 15, 2014 7:26 pm
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2 more test shots :





2 strange things :
When you close diaphragm at 16, you only have a blue image.
When you look through the lens, everything is yellow.


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Posted: Sat Mar 15, 2014 9:35 pm
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Posted: Sat Mar 15, 2014 9:35 pm
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Low contrast due to veils (internal reflection?). Easy to correct in Photoshop.


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Posted: Sat Mar 15, 2014 10:28 pm
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Posted: Sat Mar 15, 2014 10:28 pm
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I like this kind of softness with place for détails, like in your second portrait.
Your father ?


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Posted: Sat Mar 15, 2014 10:38 pm
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Posted: Sat Mar 15, 2014 10:38 pm
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Olivier wrote:
I like this kind of softness with place for détails, like in your second portrait.
Your father ?


Yes Smile


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Posted: Sun Mar 16, 2014 4:20 pm
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Posted: Sun Mar 16, 2014 4:20 pm
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That softness and ghosting/lack of contrast is mesmerising. I wouldn't correct that. Nice samples!


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Posted: Sun Mar 16, 2014 4:51 pm
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Posted: Sun Mar 16, 2014 4:51 pm
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pd1987 wrote:
That softness and ghosting/lack of contrast is mesmerising. I wouldn't correct that. Nice samples!


I too Smile . If I want lot of contrast and sharpness, I have some lens for this. I buy lenses to have different rendering, would be pity to erase them with photoshop.


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Posted: Sun Mar 16, 2014 6:23 pm
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Posted: Sun Mar 16, 2014 6:23 pm
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pd1987 wrote:
That softness and ghosting/lack of contrast is mesmerising. I wouldn't correct that. Nice samples!


I agree, it's a quality of the lens that works for these pictures. I wouldn't PP them.


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Posted: Sun Mar 16, 2014 7:18 pm
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Posted: Sun Mar 16, 2014 7:18 pm
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This looks very cinematic, very awesome.
Can you show the adaptation?
Cheers,
Timo


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Posted: Sun Mar 16, 2014 8:21 pm
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Posted: Sun Mar 16, 2014 8:21 pm
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2 another photos from this evening :





Adaption is pretty simple. The main problem was short focal flange. I think it's quite similar to L39 (which is quite suprising for a 100mm lens). I made a very raw adaptation, I'll do later something more solid (but naturely reversable, I would never arm such lens).



1 = Jupiter-6 metal hood (under the big amount of scotch)
2 = Helicoide M42
3 = Flat M42 to Nex (in order to be as close to sensor as possible)
4 = I use the lid of this tea box as ground of the adapter :


I made a hole and fixed an M42 mount.

Yes, it's far to be solid, but it's enough to make photo. Just need to be carefull when you use it Smile

Btw, here is the optical diagram :



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Posted: Mon Mar 17, 2014 7:53 am
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Posted: Mon Mar 17, 2014 7:53 am
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That is one McGyver adaptation! I love it Very Happy also, the other two examples are very cool, i really like the washed out look
Do you know the flange distance?
Cheers
Timo


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Posted: Mon Mar 17, 2014 8:27 am
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Posted: Mon Mar 17, 2014 8:27 am
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Les cerisiers sont en fleurs ! Smile

Very nice pictures, Pierre.


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Posted: Tue Jun 17, 2014 10:03 pm
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Posted: Tue Jun 17, 2014 10:03 pm
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More solid and stable adaptation, so some new shots Smile .
I still somehow find color rendering quite weird. No PP on color exepted the picture with the boat.













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Posted: Wed Jun 18, 2014 2:12 am
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Posted: Wed Jun 18, 2014 2:12 am
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What white balance are you using?
I am not sure with the A7, but the Nikons make sometimes very strange WB if non-chipped lenses are used in Auto.

The pictures are enchanting.


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Posted: Wed Jun 18, 2014 2:28 am
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Posted: Wed Jun 18, 2014 2:28 am
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I'm using AWB. Usualy works well with other lenses. But maybe the A7 has problem with very strong blue glasses.
Thanks!


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Posted: Fri Jun 20, 2014 12:33 am
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Posted: Fri Jun 20, 2014 12:33 am
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I didn't notice question about flange distance. It's a bit shorter than M42. So you definitly can't reach infinity on DSLR, because need some additional space to adapt it. I was quite surprised at first, usualy long focal lens have long flange distance.

Also, for those who are interested in what type of camera it was used, here it is :


from photohistory : http://www.photohistory.ru/1207248179959706.html
Weight of the whole "box" - 25kg. It's written that was used in some Mig-21.

Last serie with this lens Smile

#2 is wide open (that's why yellowish)
The more you close aperture, the more shadows become blue

#1


#2


#3

#4


#5


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Posted: Fri Jun 20, 2014 7:20 am
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Posted: Fri Jun 20, 2014 7:20 am
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Very beautifully, Pierre! Looks like old film


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Posted: Sat Oct 04, 2014 10:18 pm
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Posted: Sat Oct 04, 2014 10:18 pm
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I made a new adaptation (again) for this lens. This time, it's pretty solid, I can say it's the final version Smile





Ok, that's not a compact adapter, and it can be terrific for pedestrian around me, but it works Wink

So, I tested it again. It's definitely a good lens with unique caracter (according to me)

I only added a bit more contraste, colors are 100% naturals.

All wide open exepted the last one (@ 4.5)

#1


#2 100% crop


#3


#4 100% crop


#5


#6 100% crop


#7


#8 100% crop center


#9 100% crop edge


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Posted: Sat Oct 04, 2014 11:45 pm
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Posted: Sat Oct 04, 2014 11:45 pm
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Thats great... Very Happy
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