Paul Goodyear Posted October 22, 2015 Share Posted October 22, 2015 Hello people,I am a relatively new anamorphic shooter. I just got a GH4, a Sankor 16F, and a Rangefinder. First off, it's great. There are two main lenses I am using. A Rokinon 85mm T1.5 and an old Yashica 50mm F/2. But shooting some tests today I encountered this.Around the phone you can see strong "ghosting". This was on the 85mm at T2.8. The 85mm should have far superior optics to the 50mm, but here is a shot from the 50mm.But there is no ghosting on this shot, or any shot I've taken with the 50mm. So, I have no idea what is going on. I did a few more tests with the 85mm.Above - 85mm at T1.5Above - 85mm at T1.5Above 85mm at T2.8And just for kicks and giggles here is another from the 50mm at about F/5 None of these shots have any sharpening applied to them. I also tried using it with a crappy old 135mm F/3.5. There was a little ghosting on that one, but was completely gone after stopping down to F/5.6. On the 135mm I am assuming the ghosting comes from the poor optics (it also ghosts when not used anamorphic). But I have no explanation for why the 85mm does. The only thing I can assume is that it does this because of the front diameter. The Rokinon has a 72mm filter thread and both the Yashica and the crappy 135mm lens have a 52mm front thread mount. Have any of you all experienced this before? And if so, do you know how to solve it? I would like to know before I go out and buy another 85mm. Quote Link to comment Share on other sites More sharing options...
jgharding Posted October 22, 2015 Share Posted October 22, 2015 I think it's "saggital coma" which an artefact in some lenses when used at their widest, though I could be mistaken.if you don't like it you'll have to only use the 85 closed down, or find another 85 that doesn't exhibit this with your particular anamorphic lens.or use it intentionally as a kind of romantic softening for portraits Paul Goodyear 1 Quote Link to comment Share on other sites More sharing options...
BrooklynDan Posted October 22, 2015 Share Posted October 22, 2015 Anamorphic lenses actually work better when used with older, simpler, smaller optics. It sounds counter-intuitive, but the bigger and shinier the prime lens is, the crapper the anamorphic generally looks. This is why you don't see many people screw a Kowa to, say, a Canon L-series. It would look abysmal. This is why your 50 and your 135 look good, they are old, crappy lenses, whereas the Rokinon is a brand new lens, with a much larger optic. My advice is to get a vintage 85mm. Something tiny, and preferably radioactive. It'll make your anamorphic sing. Paul Goodyear 1 Quote Link to comment Share on other sites More sharing options...
Bioskop.Inc Posted October 22, 2015 Share Posted October 22, 2015 Have you tried with & without the Rangefinder?How about a wider shot with the 85mm, does it still behave like this?Also, try stopping down to T4 - I seem to remember that the Sankor's aren't the sharpest & their optimal T stop is about 4-5.6ish. When doing a close-up, like your examples, I have encountered this with a lens that is soft wide open or close to wide open.The only other thing that I can say is that some lenses just don't pair well with certain anamorphics. If your lens is ok without the Sankor, then they just don't pair well - most of these anamorphic attachments prefer simple lens designs. Quote Link to comment Share on other sites More sharing options...
Nikkor Posted October 22, 2015 Share Posted October 22, 2015 You have to use lenses with small front diameters, otherwise you might even get ghost images from the corners that are seeing outside the anamorphic lens. Quote Link to comment Share on other sites More sharing options...
jgharding Posted October 22, 2015 Share Posted October 22, 2015 Anamorphic lenses actually work better when used with older, simpler, smaller optics. It sounds counter-intuitive, but the bigger and shinier the prime lens is, the crapper the anamorphic generally looks. This is why you don't see many people screw a Kowa to, say, a Canon L-series. It would look abysmal. This is why your 50 and your 135 look good, they are old, crappy lenses, whereas the Rokinon is a brand new lens, with a much larger optic. My advice is to get a vintage 85mm. Something tiny, and preferably radioactive. It'll make your anamorphic sing.I just got a set of old Russian nuclear lenses for this exact reason.You can actually find them NEW on ebay because millions were made, and for 30-50 £The only downside is I've grown a few extra fingers, but it makes focus pulling easier. Paul Goodyear 1 Quote Link to comment Share on other sites More sharing options...
Paul Goodyear Posted October 23, 2015 Author Share Posted October 23, 2015 After some more tests. The rangefinder does introduce chromatic aberration, but after watching and studying some anamorphic films, it seems that is common of almost all true anamorphic lenses too (maybe the fact that there is a focusing element makes CA). But anyway, yeah, it seems the "ghosting" is just due to the fact that it is new and large glass. I am looking at getting a Jupiter 9, but does anyone have any other options that are EF compatible for the 85mm focal length that are cheaper? Quote Link to comment Share on other sites More sharing options...
richg101 Posted October 23, 2015 Share Posted October 23, 2015 does the vertical smear change direction when you rotate the rangefinder? look for any 85mm/2.8 lens. as a rule most 85mm f2.8 lenses are superb quality. The jupiter is the best bang for buck, closing to f2.8 and its a good choice. if budget allows... a 85mm/2 olympus zuiko is a nice lens Paul Goodyear 1 Quote Link to comment Share on other sites More sharing options...
Nikkor Posted October 23, 2015 Share Posted October 23, 2015 If you want to try something akward but which could give you the best quality possible, find a bronica nikkor-p 80 2.8, the back diameter of your sankor should match the front lens exactly. This lens has no helicoid and there are no adapters available, but since you have the rangefinder you could find some hardcore hot glue solution (gluing some extension tube to the lens). Paul Goodyear 1 Quote Link to comment Share on other sites More sharing options...
Paul Goodyear Posted October 24, 2015 Author Share Posted October 24, 2015 No, the smear isn't due to the rangefinder. The rangefinder adds CA, but nothing else. I guess the 85mm T1.5 just doesn't pair well. Thanks for the tip on the olympus lens. I totally forgot OM was EF adaptable. Quote Link to comment Share on other sites More sharing options...
richg101 Posted October 24, 2015 Share Posted October 24, 2015 No, the smear isn't due to the rangefinder. The rangefinder adds CA, but nothing else. I guess the 85mm T1.5 just doesn't pair well. Thanks for the tip on the olympus lens. I totally forgot OM was EF adaptable.ps. the earlier 85mm/2 zuiko lenses are available in 'non MC' versions. or at the very least they're not marked as 'MC' meaning the coating quality probably isn;t as refined as a later MC version. Personally I'd select the non MC version to match the older coatings on your sankor:) it would appear the 'silver nose' version is the older one. http://www.ebay.co.uk/itm/Excellent-Olympus-OM-F-Zuiko-Auto-T-85mm-f-2-from-JAPAN-109-/272022055907?hash=item3f55c72be3:g:A8IAAOSwo0JWH5x- coatings are brozy rather than blue/purple/green Quote Link to comment Share on other sites More sharing options...
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