G vs E diapragm

niemeyjt

More of the telephoto lenses seem to be moving to the electromagnetic diaphragms.

Any thoughts on whether this is feasible / desirable / economic to do on the smaller lenses?

Also, Novoflex offer electronic bellow for Canon - and I know this is not Novoflex Rumours - but is it just the electromagnetic diaphragm on the Canon lenses what enables it to happen and would similar electromagnetic diaphragms on Nikon lenses enable similar bellow to be produced - or is there something else that Canon have in addition?

Ironheart

Novoflex makes several G type F mount adapters. You should be able to use a setup like this to control aperture while using a bellows:
http://www.bhphotovideo.com/c/product/724050-REG/Novoflex_EOSNIK_NT_EOS_NIK_NT_Lens_Adapter_for.html

niemeyjt

Thanks, but what I was wondering was whether E functionality would allow the Nikon equivalent of this:

http://www.novoflex.com/en/products/macro-accessories/reverse-adapter-eos-retro/

Ironheart

Yes, if novoflex or others would build it. It's no different than an extension ring or a teleconverter. I was pointing out it is possible to control the aperture manually, even on the lenses that have no aperture ring.

niemeyjt

Thanks. I guess it is the subject of a separate thread as to why Nikon don't put electronic contacts in their extension tubes already - yet a third party does!

So, for a dream scenario - Nikon convert G lenses to E, bring out extension tubes, bellows and converters to support full functionality then bring out an MP-E65 killer.