Can you imagine the trouble required to get a M7 to focus something like that accurately? It just wouldn't work.wow, how was it possible to make such a lens for 6x6 when they don't even have anything smaller than one 2.8 for hassleblad/mamiya normally, is it just the expense or is it more difficult? I just find it strange, my Mamiya 7 would be so much better if there were a 1.8 option let alone a 0.70 option but it doesn't even have a 2.8, 4 is all you get.
I think they erroneously claim it is originally for a Hasselblad. That lens is of a smaller diameter (seemingly at least) than the current Distagon 50/4, therefore physically impossible for it to be a faster f/stop.
I think i've read about Zeiss saying something to that effect. Can't find the original wording now, but it was something along the lines of, "yes, we can make faster, but we don't, we'd rather make high IQ"David Lyga said:Maybe Hasselblad was smart to limit theirs to 2.8
AgX said:That lens has a back focus of 4mm. I don't know whether this would still work on a Hasselblad with focal plane shutter.
It could work in the same way as the SWC, no mirror. If it was made for NASA it was probably made for either astronauts taking shots of earth from space, or taking night-shots of skies. Either way, it could have been built as an aerial camera, fixed hyperfocal so no need to focus.
Well also, this was used for 35mm movie film, which isn't 24x35 because the image is made "vertical" on a spread out film strip rather than horizontally. So really it's an APS size area that needs to be hit, so that probably helps with the 0.70 right?
I did not refer to the mirror (maybe the mirror-lock up will not release automatically after exposure, I don't know), but to that 4mm to contain the distance from film to shutter and the shutter itself.
The depth of focus is only dependant on focal lenght and aperture, not on image size/format.
(I leave aside the issue of enlarging and circle of confusion.)
Furthermore Kubrick used the lens on a viewfinder camera. Focussing was most probably done done by means of tape.
Oh! So not movie size....
Also when I mentioned the size format, I was thinking of the comment someone made about the physical size of the glass, and I was saying of it were closer to an APS size area, the glass wouldn't have to be as big to pull off f/0.70 that's all.
~Stone | Sent w/ iPhone using Tapatalk
I'm also confused at it covering 6x6. 50mm on 6x6 is pretty wide. Maybe the sign meant to say "was based on", ie a 50mm 'normal' planar based on an 80mm 'normal' planar.
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