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MIR-1B lens review by squall
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PostPosted: Mon Jul 02, 2007 10:02 pm    Post subject: MIR-1B lens review by squall Reply with quote
http://www.mflenses.com/content/view/279/


PostPosted: Tue Jul 03, 2007 5:20 am    Post subject: Reply with quote
For the first time I think i made it OK. Wink


PostPosted: Wed Jul 04, 2007 11:30 am    Post subject: Reply with quote
It's very o.k., Ivan, outstanding images and I support every word. The Mir-1 is one of my favourite lens, I own two different versions of it. Sadly it hits the mirror of our 5D, so I could use it only as a normal focal length with the 350D. I've taken a few pictures in Paris with this lens the last days and I'm impressed by the sharpness and low distortion.

Only a small fussy remark Very Happy :
According to the site http://www.zenitcamera.com/archive/history/volosov-lenses.html#p457 the Mir 1 was developed 1954. There are a few interesting lines about the lens: (babelfished)

Outstanding objective it is Mir-1. It have developed we in 1954 on the basis of the optical diagram Of flektogon of Dr. g. tsel'ner (GDR). In contrast to the objective Of flektogon, in which are used lanthanum heavy crowns, we used simple optical glass. at the same time we succeeded herself in more completely correcting the spherical aberration of higher orders and all chromatic aberrations in the region of the spectrum from G ' (l=434,1 nm) to C (l=656,3 nm), in particular the chromatic aberrations of the rays of wide oblique pencils, which led to an improvement in the quality of optical image... [ p. 457

Michael


PostPosted: Wed Jul 04, 2007 11:47 am    Post subject: Reply with quote
Borges wrote:
In contrast to the objective Of flektogon, in which are used lanthanum heavy crowns


OK So Flektogons use Lanthanum "heavy crowns" (?)

Give me up Sad Sad Sad


PostPosted: Wed Jul 04, 2007 12:04 pm    Post subject: Reply with quote
http://en.wikipedia.org/wiki/Crown_glass_%28optics%29

I've posted a link to a pdf from erwin puts about leica M lens some time ago (www.leica-camera.us/assets/file/download.php?filename=file_139.pdf), there you can also find some explanations about crown and flint glass used for optics.

Michael


PostPosted: Wed Jul 04, 2007 12:08 pm    Post subject: Reply with quote
sqwall wrote:
For the first time I think i made it OK. Wink


Very well done! I really think you hit the point!

My MIR-1B used to be my favourite 35mm lens, until I got Orio's Nikkor. Wink
But it still is a great lens in mint condition and I would never sell it.


PostPosted: Wed Jul 04, 2007 1:14 pm    Post subject: Reply with quote
Borges wrote:


Outstanding objective it is Mir-1. It have developed we in 1954 on the basis of the optical diagram Of flektogon of Dr. g. tsel'ner (GDR). In contrast to the objective Of flektogon, in which are used lanthanum heavy crowns, we used simple optical glass. at the same time we succeeded herself in more completely correcting the spherical aberration of higher orders and all chromatic aberrations in the region of the spectrum from G ' (l=434,1 nm) to C (l=656,3 nm), in particular the chromatic aberrations of the rays of wide oblique pencils, which led to an improvement in the quality of optical image... [ p. 457



Very interesting. It is great to hear that the russian genius worked again. They tweaked the flektogon platform to the point that with less expensive materials the image quality is better than the Fleck one. And that is proven because my mir really gives low to none CA in most situations.

Thanks for the tip Michael
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