Originally posted by surfar Kipon make an adapter with an aperture ring, it costs more than what I originally thought though.
It must control within the adapter, so the lens must be set wide open initially.
You're right. Thank you! I had never seen that before.
I've sold off most of my Canon lenses, but it might be worthwhile for me to look into this anyway.
Adorama carries them.
The price is $120, which is considerably less than the price for a Pentax K-to-Q adapter, but that adapter has an internal leaf shutter.
Adorama seems to have adopted the supplier's stilted language, and the photo angles are awkward, but apparently it does have its own internal iris.
I'm not sure why all these adapters, including the Pentax one, have the funky "1", "2", etc labeling on the f-stop ring, rather than telling us what the values really are.