tommy holman Posted February 25, 2008 Share Posted February 25, 2008 Hey, Im AC'ing a short coming up which is using Zeiss superspeed 35mm lenses, but shooting on 16mm, how does that effect my depth of field? I know i am still shooting the same format, so my COfC will stay the same right? but 35mm lenses have a shallower depth of field, so will it reduce my depth of field, from say if i was using 16mm lenses? and if so, how can i get depth of field tables for this reduction in depth of field? any help would be great, thanks for your time, Tommy Holman Link to comment Share on other sites More sharing options...
Premium Member Chris Keth Posted February 25, 2008 Premium Member Share Posted February 25, 2008 It doesn't affect it at all. Proceed as you would if you had lenses designed for 16mm. Link to comment Share on other sites More sharing options...
tommy holman Posted February 25, 2008 Author Share Posted February 25, 2008 Thanks Chris, thats what i thought i will carry on as if i was shooting with 16mm lenses. Link to comment Share on other sites More sharing options...
Premium Member Brad Grimmett Posted February 25, 2008 Premium Member Share Posted February 25, 2008 but 35mm lenses have a shallower depth of fieldTommy Holman No, they don't. The depth of field is the same. It's the format you shoot on that makes the difference, not the lenses. Link to comment Share on other sites More sharing options...
Rory Hanrahan Posted February 26, 2008 Share Posted February 26, 2008 Just keep in mind that there is an effective change in focal length (like putting a 35mm SLR lens on a smaller format DSLR). The lens is the lens is the lens, but your field-of-view will change based on your format. Link to comment Share on other sites More sharing options...
tommy holman Posted February 26, 2008 Author Share Posted February 26, 2008 great thanks for all your help with the subject, tommy Link to comment Share on other sites More sharing options...
Premium Member Tristan Noelle Posted February 26, 2008 Premium Member Share Posted February 26, 2008 An instructor once told me to not chance using a set of PL mount Zeiss primes made for 35mm on a Super16 SR2 because the rear element could interfere with the shutter. Is that a problem anyone has run into? Link to comment Share on other sites More sharing options...
Premium Member John Sprung Posted February 26, 2008 Premium Member Share Posted February 26, 2008 An instructor once told me to not chance using a set of PL mount Zeiss primes made for 35mm on a Super16 SR2 because the rear element could interfere with the shutter. Is that a problem anyone has run into? No, if anything it would be the other way. The 35 aperture is wider, so the mirror at 45 degrees to the film plane would have to extend farther from that plane at the optical axis. If you're worried, test it. With the camera empty, inch the shutter open, mount the lens, focus to infinity, and very gently inch it while looking thru the aperture. The other caveat using 35 format lenses on 16 is that the wide angles, say 18 mm and wider, will have a lot of design compromises that make them not as sharp and flat as the same focal length designed only to cover 16mm. -- J.S. Link to comment Share on other sites More sharing options...
Premium Member Tristan Noelle Posted February 27, 2008 Premium Member Share Posted February 27, 2008 No, if anything it would be the other way. The 35 aperture is wider, so the mirror at 45 degrees to the film plane would have to extend farther from that plane at the optical axis. If you're worried, test it. With the camera empty, inch the shutter open, mount the lens, focus to infinity, and very gently inch it while looking thru the aperture. The other caveat using 35 format lenses on 16 is that the wide angles, say 18 mm and wider, will have a lot of design compromises that make them not as sharp and flat as the same focal length designed only to cover 16mm. -- J.S. Thanks for the information John. I'll give that test a try. Link to comment Share on other sites More sharing options...
Premium Member Chris Keth Posted February 28, 2008 Premium Member Share Posted February 28, 2008 Thanks for the information John. I'll give that test a try. Do it VERY gingerly and disconnect the battery when you do it. You don't want any chance of accidentally phasing or running the camera with something in the way of the mirror. That would be a very expensive mistake with, I'm betting, a really sickening noise associated. :o :blink: Link to comment Share on other sites More sharing options...
Patrick Neary Posted February 29, 2008 Share Posted February 29, 2008 Just keep in mind that there is an effective change in focal length (like putting a 35mm SLR lens on a smaller format DSLR). Hi- I hate to be the one to point this out, but if I put a 50mm lens on an SR3 then just exactly what focal length does it effectively become? and yes, I already know the answer.... ;) Link to comment Share on other sites More sharing options...
Premium Member Chris Keth Posted February 29, 2008 Premium Member Share Posted February 29, 2008 Hi- I hate to be the one to point this out, but if I put a 50mm lens on an SR3 then just exactly what focal length does it effectively become? and yes, I already know the answer.... ;) I don't like it when people refer to it as an effective change in focal length, either. <_< It's a change in field of view. Nothing more. Link to comment Share on other sites More sharing options...
Premium Member Adrian Sierkowski Posted February 29, 2008 Premium Member Share Posted February 29, 2008 50mm. So far as I know the lens isn't going to grow. . . Link to comment Share on other sites More sharing options...
Rory Hanrahan Posted February 29, 2008 Share Posted February 29, 2008 Chris -- You're absolutely right, and while I was trying to convey that point as lightly as possible, I have also been waiting for the captive bolt air-gun to knock in my doorknob and cry: "Nay, you silly bastard, nay"? Link to comment Share on other sites More sharing options...
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