Having seen where a matte box fits, could somebody try this out WITH Auto (PUSH) Focus <> Manual Focus? Please?

TIA - Grazie

Im using a mattebox though all my focus is manual.

Understood. But CAN you momentarily apply AF? Once applied can you go BACK to MF? I do this with my Manfrotto 521Pro LANC. I'm wishing to know if using a MB does it get in the way of AF?

I think Grazie is asking for a test, from somebody who has a matte box on their XH (Noel?). It seems that the Push AF button uses the Instant Autofocus feature; at least that's what we've heard. Obviously the I.AF feature is disabled whenever a matte box or other lens attachment blocks that sensor . So the question is, with the I.AF sensor blocked by a matte box, what happens when the Push AF button is pressed while the camera is in Manual Focus mode? My guess is that the Push AF button reverts to Normal AF if the Instant AF is unavailable. Who wants to test this?

Thank you Chris! My Hero!! Exactly that.

I think there might be a way to assign a custom button as a toggle for the standard autofocus. That may be the solution for those wanting to use a matte box or wide angle lens. I wonder if there's a way to re-assign the Push AF button.

Noel, what mattebox are you using?

To ask the Q again:
If you block the Instant Autofocus sensor (with a mattebox or test it with some tape), what is happening with the Push AF button?

The autofocus is using two sytems:
1) Distance reading with the instant autofocus sensor
2) and then with the second autofocus system.

What is happening if you block the IAF sensor?

What happens when the Push AF button is pressed while the camera is in Manual Focus mode and the IAF sensor is blocked??

Ill check it out this morning and report back. Im pretty sure though the IAF does not work with a mattbox attached, however the AF does.

It's established that I.AF does not work with a mattbox attached. The only question is, how does that affect the Push AF button.

I can verify push AF button works with mattebox. Ill post a 3-4 second clip later... setting up for a lit shot atm.

So then it is using the 'classic' AF system that remains operative, thanks for now!