Need to fix the focal distance when operate other things on camera

[Mahalarp]

Hi

 

I'm using Fuji X-T1 GS for a while and mostly are on landscape photographs.

 

Normally I start with auto focus to focus the subject/distance I want on tripod and after that I just keep the focal distance by changing focus mode to M (at front pedal).

 

The thing is if I do operate other things on my camera such as checking photo from play menu after a few photos taken or even turn off camera while focus mode still on M, after turn on camera again or get back to normal shooting mode after using other menus, focal distance seems to be changed and I need to refocus every times.

 

My Pre-AF is off. and I think it happens in most of the lenses I have (I mostly use 10-24 f/4, 16-55 f/2.8 and 50-140 f/2.8 for landscape shooting but sometimes prime lenses as well)

 

How do I lock this focal distance value every time till I change it by myself manually or with re-auto focus? Or any setting that I missed it.?  

 

Thank you very much

[darknj]

I do not think that's something that can be changed, since the lense are focusing by wire, you have nothing that moves the glass mechanically, thus when you turn the camera off, it resets back to its default position, which might not be where you left it.

[Antony]

Also , when switching between AF-S and MF the focus point can shift. This was an issue for me until I simply set the camera to MF and used the rear AF button to obtain focus in MFmode.