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Projection lens Helios 92mm/2
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PostPosted: Tue Jul 08, 2014 6:12 pm    Post subject: Projection lens Helios 92mm/2 Reply with quote

Hi everybody,

Here are some photos made today with this projection lens ( I still find it quite strange to use biotar design on projector... but many site refere this lens to be an Helios). It has focusing ring from his projector, but naturely no diaphragm.
On Sony A7.


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Last edited by BurstMox on Tue Jul 08, 2014 6:22 pm; edited 1 time in total


PostPosted: Tue Jul 08, 2014 6:15 pm    Post subject: Reply with quote

Awesome. Some swirling brokeh actions going on as well.


PostPosted: Tue Jul 08, 2014 6:29 pm    Post subject: Reply with quote

the lens itself, adapted to M42 :







PostPosted: Tue Jul 08, 2014 7:13 pm    Post subject: Reply with quote

Very nice! How is that focusing done?


PostPosted: Tue Jul 08, 2014 7:24 pm    Post subject: Reply with quote

Focus part (black) is from the projector itself. The silver part is adapter. So, you just have to "extract" the focus ring from the projector LETI-60 (ЛЭТИ-60), and adapt it to M42 (not hard, diameter are quite close)
Maybe it's easier to understand with photo :

http://ust-kamenogorsk.vko.olx.kz/obyavlenie/gelios-2-92-ID4ODcW.html

Focal flange is also mod friendly, it's pretty long.


PostPosted: Wed Jul 09, 2014 7:18 am    Post subject: Reply with quote

Thanks, easy then!


PostPosted: Wed Jul 09, 2014 7:51 am    Post subject: Reply with quote

Some soviet projectors use Sonnar, Tessar and even Petzval lens designs, so, why not biotar Smile


PostPosted: Wed Jul 09, 2014 8:44 am    Post subject: Reply with quote

Cemented lens elements are to be avoided for projection as the heat tends to break the lens cement

Last edited by kds315* on Sun Sep 07, 2014 11:42 am; edited 1 time in total


PostPosted: Wed Jul 09, 2014 8:48 am    Post subject: Reply with quote

http://lens-club.ru/lenses/item/c_2907.html

140/1.8 - Petzval

ОКП1-100-1 1.8/100мм - Planar


PostPosted: Wed Jul 09, 2014 9:23 am    Post subject: Reply with quote

Planar (Double Gauss actually):
35КП f1.8 100мм https://www.flickr.com/photos/kds315/sets/72157644011296955/
35КП f1.8 120мм https://www.flickr.com/photos/kds315/sets/72157643847141845/


PostPosted: Tue Jul 15, 2014 1:07 pm    Post subject: Reply with quote

lovely rendering


PostPosted: Tue Jul 15, 2014 5:02 pm    Post subject: Reply with quote

Interesting results for sure, good to see what this little Sony beast can done in good hands! Cool


PostPosted: Tue Jul 15, 2014 5:04 pm    Post subject: Reply with quote

kds315* wrote:
Planar (Double Gauss actually):
35КП f1.8 100мм https://www.flickr.com/photos/kds315/sets/72157644011296955/
35КП f1.8 120мм https://www.flickr.com/photos/kds315/sets/72157643847141845/


Excellent colors! Vibrant, but still quite natural. How do you achieve that kind of balance?


PostPosted: Thu Aug 07, 2014 6:02 pm    Post subject: Reply with quote

New exemplar of this lens, but with diaphragm in front of the lens. When closed at around 11 and more, it vignet, but in other case, it's barely visible.
































PostPosted: Fri Aug 08, 2014 6:05 am    Post subject: Reply with quote

Nice results again! I also bookmarked your blog, keep the images coming. Smile


PostPosted: Sat Aug 09, 2014 5:53 am    Post subject: Reply with quote

Thanks Mark Smile


PostPosted: Sat Aug 30, 2014 10:46 am    Post subject: Reply with quote

Again, very nice serie ! Smile


A little "appart" for Klaus.
Great rendering for your fantastic flower photographies !
I was wondering which camera you use ?


PostPosted: Wed Sep 03, 2014 6:59 am    Post subject: Reply with quote

The guy who made some of my lenses adaptation (RO-502, Helios 92, KO-120M...) wrote instruction in order to adapt this lens to M42. It's in russian, but it may interest some of you (schems provided) : http://lens-club.ru/articles/item/c_59.html


PostPosted: Sat Sep 06, 2014 1:16 am    Post subject: Reply with quote

Uncommonly sharp and unique rendering. I like that.


PostPosted: Sat Sep 06, 2014 1:22 am    Post subject: Reply with quote

What camera?


PostPosted: Sun Sep 07, 2014 10:07 am    Post subject: Reply with quote

Sony A7


PostPosted: Sun Sep 07, 2014 11:41 am    Post subject: Reply with quote

Olivier wrote:
Again, very nice serie ! Smile


A little "appart" for Klaus.
Great rendering for your fantastic flower photographies !
I was wondering which camera you use ?


hee hee, well said!


PostPosted: Sun Sep 07, 2014 1:41 pm    Post subject: Reply with quote

kds315* wrote:
Olivier wrote:
Again, very nice serie ! Smile
A little "appart" for Klaus.
Great rendering for your fantastic flower photographies !
I was wondering which camera you use ?


hee hee, well said!

Secret ? Very Happy
Nikon D70 ?


PostPosted: Tue May 26, 2015 2:02 am    Post subject: Reply with quote

Great results!


PostPosted: Tue Nov 03, 2015 4:58 pm    Post subject: Great lens Reply with quote

Really great lens, thanks for sharing!
I think this lens is fabulous, and they are very little information about it on internet… I feel really lucky I’ve got it for cheap Smile
Here a little gallery with my first experiments with it!
https://www.flickr.com/photos/claudiocastelli/albums/72157660773319785