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Helios-40 lens scheme
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PostPosted: Thu Jun 30, 2016 3:11 pm    Post subject: Helios-40 lens scheme Reply with quote

1st version, anyone can find me the exact lens scheme? I've seen this one but not sure if refers to the 40 or the 40-2 or if they are the same...



Laugh 1


PostPosted: Thu Jun 30, 2016 3:24 pm    Post subject: Reply with quote

Same BIOTAR scheme from what I know, maybe changed glass type and certainly different coating


PostPosted: Fri Jul 01, 2016 8:41 am    Post subject: Reply with quote

Schem is the same from 1956 to 2016.
As Klaus said, coating has been modified in 1970(for the 40-2), and a second time in 2013.


PostPosted: Fri Jul 01, 2016 4:54 pm    Post subject: Reply with quote

Yes, it is.
http://www.zenitcamera.com/archive/lenses/helios-40.html

Another page about Helios-40 :
http://www.photohistory.ru/index.php?pid=1207248188953890


PostPosted: Sun Jul 03, 2016 1:08 pm    Post subject: Reply with quote

looks like the same picture?
don't know why it is redrawn Smile



PostPosted: Sun Jul 03, 2016 1:10 pm    Post subject: Reply with quote

ok, is the front group two lenses or just artistic impression .. ?


PostPosted: Sun Jul 03, 2016 3:39 pm    Post subject: Reply with quote

kansalliskala wrote:
ok, is the front group two lenses or just artistic impression .. ?


3 elements in 2 groups


PostPosted: Sun Jul 03, 2016 8:16 pm    Post subject: Reply with quote

3 elements in 2 groups in front of the aperture, same with the rear optical block.
Front element, a doublet, the aperture, a doublet, and a single element.


PostPosted: Tue Jul 05, 2016 9:51 am    Post subject: Reply with quote

thanks all Like 1