I recently got an Olympus PEN and then bought a converter to use my Canon-mount lenses - mainly my Lensbaby. Since the adapter adds focal length and has no optical component, how is it that I haven't lost my ability to focus at infinity like I do with an extension tube????
Is the adapter really "adding focal length" or does the lens simply have a narrower field of view due to the smaller sensor?
I take your point, I misused the term - it adds physical length; my question remains though since it adds about as much length as a 12mm extension tube. Do you think the geometry of the small sensor in relation to the lens would mean that it is in tolerance in a way that a larger sensor would not be? I can see how that might be the case...
Is the adapter really "adding focal length" or does the lens simply have a narrower field of view due to the smaller sensor?
I take your point, I misused the term - it adds physical length; my question remains though since it adds about as much length as a 12mm extension tube. Do you think the geometry of the small sensor in relation to the lens would mean that it is in tolerance in a way that a larger sensor would not be? I can see how that might be the case...
The Canon lenses are designed with more distance between the lens and the focal plane due to the mirror box in SLR cameras. Mirrorless cameras and lenses are much smaller due to the fact that the lens elements can be closer to the focal plane. The adaptor for the Canon lens adds that spacing back so that the lens will have its full focus range.
Did you get the adaptor for EOS lenses or FD lenses? I'm wondering how you change the aperture of the EOS lens when mounted on the m4/3 body. I suspect you can't, so the lens must be used only at its widest aperture, right?
I got the EOS one, yes maximum aperture, though of course for the Lensbaby with the manual aperture rings, this is a non-issue.
I did read somewhere that if you stop it down on a Canon body and then transfer it, it will stay at that aperture. I remain dubious about that and haven't tried it.
I got the EOS one, yes maximum aperture, though of course for the Lensbaby with the manual aperture rings, this is a non-issue.
I did read somewhere that if you stop it down on a Canon body and then transfer it, it will stay at that aperture. I remain dubious about that and haven't tried it.
Yeah, I heard that, too. Not a very desireable workflow.
One of the attractions of the PEN is the ability to get some older classic lenses and use them with an adaptor. The EOS lenses are out, but I think I can pick up some older manual focus Nikon glass at pretty good prices. My favorite lens of all time was the Nikon 105mm 2.5. They never made an auto-focus version. Should be fun to experiement with. I read on the forums that some people are using Leica glass on their PENs, but even an old Summicron is expensive.
With the PENs you get the added benefit of image stabilization with ANY lens since Olympus went with in-body IS.
