Irix 15mm f/2.4 with EF-RF adaptor

vtzerpos wrote:

I recently bought a Canon RP camera with the original Canon EF-RF adaptor. Checking how my EF lenses work with the adaptor (and they do work fine), I noticed that with my Irix 15mm f/2.4 Firefly there is no focus confirmation, as it was the case when I used this lens with my previous DSLR camera (Canon 6D mark II). I am still using this lens with the camera in the AV (Aperture Value/Priority) mode and I can still change through it the aperture, which means that there is indeed communication between the camera and the lens through the adaptor, but still I don't get the focus confirmation as in my DSLR. Is this a limitation of the EF-RF adaptor or do I have to change something in the settings of the camera?

Thanks in advance for your help.

VT

I don't know about the adapter and how it may affect the indicator, but on my Samyang 14mm f2.4 XP (I didn't buy the Irix because the first 3 lenses I tried were defective - 2x Firefly and 1x Blackstone) on my 6D ii the focus indicator is sort of superfluous.

The reason being I think is that the DoF with these UWA lenses, even wide open is so big that it is fairly hard not to be in focus (good enough for daytime purposes) simply setting the focus using the distance scale (which I think from memory steps from 3m to infinity, so pretty much everything outdoors is infinity). I can rotate my focus ring quite some distance before the focus indicator will change state.

And, of course for stars (my main subject for my 14mm) the focusing has to be done MUCH more accurately than could be achieved using the focus indicator.

Colin