Luminous Landscape Forum
Equipment & Techniques => Cameras, Lenses and Shooting gear => Topic started by: PeterAit on June 15, 2019, 11:50:51 am
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A friend claims to have an adapter that lets her use Canon APS-C lenses on a Canon full-frame body and cover the entire sensor. And it's just a physical adapter, no glass. Is this even possible?
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Probably a teleconverter, a 1.4x would just about do it. Would not fit all lenses though.
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Probably a teleconverter, a 1.4x would just about do it. Would not fit all lenses though.
OP said it’s an adapter and has no glass. A 1,4 convertor would have glass would it not?
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It would of course. The only other way is to add a macro tube which would expand the image circle but at the expense of losing infinity. Also not an adapter by definition.
Best you take a look at it as I'm not sure you're getting the whole story (ie get the specific parts involved)
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Sounds odd to me. If it’s really an apsc lens to start with a simple tube with connectors wouldn’t suddenly allow it to cover FF and work normally.
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Pardon my ignorance, and our engineers and scientists would correct me if wrong, but that sounds like an extension tube, no glass, just like the ones we use for macro photography. You'd lose the ability to focus at infinity, but you'd probably get an enlarged image and cover the whole sensor, depending on the length of the extension tube.
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A friend claims to have an adapter that lets her use Canon APS-C lenses on a Canon full-frame body and cover the entire sensor. And it's just a physical adapter, no glass. Is this even possible?
she probably has Canon FF dSLM and hence EF/EF-S to R mount adapter... no glass indeed
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Would an R mount adapter even mount an EF-S lens (which, unlike other APS-C lenses, uses a physically different mount from standard EF)? If so, why - the EF-S lens is unlikely to cover full frame. An EF-M mount adapter would, but that's APS-C to APS-C.
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the EF-S lens is unlikely to cover full frame.
may be some do ? just like some FF lens do cover 44x33 MF sensor ?
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Would an R mount adapter even mount an EF-S lens
of course = https://www.usa.canon.com/internet/portal/us/home/products/details/lenses/ef/mount-adapters/mount-adapter-ef-eos-r
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she probably has Canon FF dSLM and hence EF/EF-S to R mount adapter... no glass indeed
It is all Canon gear. But I still do not understand how it works!!
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Canon R FF body or a Canon DSLR?
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I have the metabones speedbooster and it is all short of amazing.
Pickup a stop plus it is so close to ff, I think 1.07.
It does have glass though.
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A speedbooster would go the other way, wouldn't it? I thought they reduced the coverage area and effective focal length (actually magnification), while brightening the effective aperture. It's an inverse teleconverter if I understand it correctly.
A conventional teleconverter would do what this adapter does - it increases magnification and coverage area. It, too, has glass.
The only plausible adapter I can think of that does this without glass mounts an EF-S lens (SLR, APS-C) on an EF-R camera (FF mirrorless). The only way it works without coverage problems is if the EF-S lens has extra coverage and actually covers full-frame.
This seems unlikely - any camera that can mount an EF-S lens can mount an EF lens (the reverse isn't true - FF DSLRs physically won't mount EF-S lenses), so Canon would put an EF mount on any lens that covers FF. The one possibility is a zoom that covers FFat some focal lengths.