Focus problems with D 750: I have a D 750 fitted with Nikon 24-120f4 lens. In AF mode I encounter a lot of "hunting" and the shutter does not release. I have tried various permutations...

reindeer Loc: London U.K.

I have a D 750 fitted with Nikon 24-120f4 lens. In AF mode I encounter a lot of "hunting" and the shutter does not release. I have tried various permutations e.g. Release priority, disabling fine focus, changing the mode. Nothing works evening during broad daylight. I am forced occasionally to revert to manual focus with the result that many shots are lost.
Suggestions and thoughts would be appreciated. Thanks.

tradio Loc: Oxford, Ohio

Try another lens.

WessoJPEG Loc: Cincinnati, Ohio

reindeer wrote:

I have a D 750 fitted with Nikon 24-120f4 lens. In AF mode I encounter a lot of "hunting" and the shutter does not release. I have tried various permutations e.g. Release priority, disabling fine focus, changing the mode. Nothing works evening during broad daylight. I am forced occasionally to revert to manual focus with the result that many shots are lost.
Suggestions and thoughts would be appreciated. Thanks.

Try another camera.

reindeer Loc: London U.K.

So you think adjustments through camera Menu will not work?
Thanks.

rxrose Loc: North Florida

You may have it set to only take pictures when focus has been achieved. You can change it in menu settings. I can look it up later today to tell you which settings to change.

rdubreuil Loc: Dummer, NH USA

As with the two previous suggestions of try another lens or camera, it's a process of elimination. Does the lens perform the same on another camera body and vise-versa does the camera behave the same with a different lens. If a different lens performs the same it could indicate the focus plane mirror/sensor in the camera is out of whack and it's having trouble telling what's in focus and what's not, if that's the case it would require factory adjustment. It may also be that camera and lens combination causing front or back focusing; have you tried making any adjustments using the focus adjustment settings in the camera for that lens?

reindeer Loc: London U.K.

Thanks. I will give it a try. Much obliged.

billnikon Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont

reindeer wrote:

I have a D 750 fitted with Nikon 24-120f4 lens. In AF mode I encounter a lot of "hunting" and the shutter does not release. I have tried various permutations e.g. Release priority, disabling fine focus, changing the mode. Nothing works evening during broad daylight. I am forced occasionally to revert to manual focus with the result that many shots are lost.
Suggestions and thoughts would be appreciated. Thanks.

Sounds like the lens did not SEAT properly, remove lens, clean terminals on body and lens, lens cleaning tissue good enough, put back on lens and make sure it CLICKS in. Or, do a camera reset to defaults. Green or red buttons, can't remember.

fuminous Loc: Luling, LA... for now...

This happened with my D600, with the "hunting" circumstance growing more and more frequent and occurring with multiple lenses. In response, I cleaned the contacts of both and lens(es) and camera and also the mirror- front and back- and the entire "box" where the mirror resides and afterwards noted some improvement. To me, that suggests a communication problem but does not identify a point of failure: lens or camera? Understand, I work in very dusty environment and as such, my situation may be different from yours. Regardless, I'd suggest a good dusting...

jerryc41 Loc: Catskill Mts of NY

reindeer wrote:

So you think adjustments through camera Menu will not work?
Thanks.

Unlikely.

jerryc41 Loc: Catskill Mts of NY

reindeer wrote:

I have a D 750 fitted with Nikon 24-120f4 lens. In AF mode I encounter a lot of "hunting" and the shutter does not release. I have tried various permutations e.g. Release priority, disabling fine focus, changing the mode. Nothing works evening during broad daylight. I am forced occasionally to revert to manual focus with the result that many shots are lost.
Suggestions and thoughts would be appreciated. Thanks.

Try using the single center spot for focus on a subject with good contrast and sharp lines.

picsman Loc: Scotland

I had a problem that the image jerked about then settled down with the same gear. Returned to Nikon who said it was an af problem in the lens. Going to cost a lot to repair but has to be done. (I did test different lenses and bodies but was the lens only.)

mborn Loc: Massachusetts

rdubreuil wrote:

As with the two previous suggestions of try anothe... (show quote)

Good advice But also clean the contacts on the Lens and Camera with a contact cleaner you will be surprised at all the crud that accumulates in the contacts and mounting surfaces

wingclui44 Loc: CT USA

reindeer wrote:

I have a D 750 fitted with Nikon 24-120f4 lens. In AF mode I encounter a lot of "hunting" and the shutter does not release. I have tried various permutations e.g. Release priority, disabling fine focus, changing the mode. Nothing works evening during broad daylight. I am forced occasionally to revert to manual focus with the result that many shots are lost.
Suggestions and thoughts would be appreciated. Thanks.

Your camera may be on AFc (continues focus mode that you didn't know), if so set it back to AFs, and use single point focus.

camerapapi Loc: Miami, Fl.

I would check with Nikon. Many AF errors by the way are operator's errors.