[Bluefin]

A big hello to everyone! Recently joined your forum because I recently purchased a 645z! The forum has already been a great help to me as I try learn all about the Pentax 645 lenses.

I read the manual and the menu guide and found if very intuitive and easy to understand. I've been shooting Nikon systems for the past 10 to 12 years and that made it easy for me to understand how the system works.

Anyway, after studying the menus and manuals, I could not find anyway to AF Lock except to switch to manual focus on the lens! None of the button customization options seemed to offer AF Lock. It's not a huge deal as I usually use manual focus anyway but it does help when in AF and trying to set up a fast composition.

Love the 645z, love the MF Images and am pissied I didn't make the move a couple of years ago!

Thanks again for being here to help out us newbies...........Mark

[Bob L]

If you configure the 645Z so that AF is only on the AF button on the rear and not on the shutter release then you simply stop focusing by releasing the AF button......for focus and recompose I assume.

See page R20 of your user guide and Enable AF2 in the menu.

Bob

[Bluefin]

If you configure the 645Z so that AF is only on the AF button on the rear and not on the shutter release then you simply stop focusing by releasing the AF button......for focus and recompose I assume.

See page R20 of your user guide and Enable AF2 in the menu.

Bob

Hey Bob,

You're right of course but I tried that on my DSLR and got so confused every time I was in a rush to get a shot off that it was comical! I guess you just have to keep at it to overcome the decades of rote memory!

Thanks again....Mark

[mikeSF]

I only use back button focus so I may be of no help here, but I recall on earlier Pentax cameras being able to program the rear AF button for "AF cancel" when used in conjunction with the half press AF configuration. Are you saying that is no longer offered?

[Bob L]

That's still an option too, Mike. Select "AF cancel" in the same menu field.

Bob

[Bob L]

That's still an option too, Mike. Select "AF cancel" in the same menu field.

Bob

[Bluefin]

I think I'll just bite the bullet and learn back button focus. Thanks for all the great advice.............Mark

[mikeSF]

That's still an option too, Mike. Select "AF cancel" in the same menu field.

Bob

thx for confirming hat - i didn't have camera with me to look for myself.

---------- Post added 08-24-2016 at 08:47 AM ----------

I think I'll just bite the bullet and learn back button focus. Thanks for all the great advice.............Mark

oh, now you're talking! Let us know how it goes, but I have a feeling you will love using BBF!!