Questions tagged [autofocus]

Autofocus is the ability of a camera/lens system to automatically adjust the focus of the lens via a motor attached to the focus group of the lens. Contrast with manual focus.

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What part of Canon 50mm f1.4 is responsible for failure to autofocus?

I have the Canon 50mm f1.4 which had the common focus issue due to deformed inner focus ring. I have straightened the ring and the lens now had full range of manual focus, but Autofocus cannot find a ...
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0answers
475 views

Panasonic lens autofocus does not work with Olympus bodies?

I just got a Panasonic Lumix Nocticron 42.5mm lens and the autofocus does not appear to work with my OM-D E-M1 M2 body. Is autofocus supposed to work on non-Panasonic bodies for this lens, or no? Is ...
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435 views

What are the different types of auto-focus motor and how do they compare?

What is the difference of ultrasonic motor, stepper motor, and electromagnetic drive? Which one of these are lens-based or screwdrive? What are the advantages of lens-based servo over screwdrive and ...
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184 views

Canon 6D Auto Focus Erratic Behavior

I have a 2 year old Canon 6D which I use primarily for landscape photography and taking shots of my grandkids. It exhibits a strange behavior at times when I lift it to my eye to compose a shot. ...
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1answer
58 views

Polaroid Sun 660 problem

I need help with one Polaroid sun 660. It seems that auto focus is not working at all. After investigation on internet i noticed that this camera has a 4 disc lens , so every time that you press the ...
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1answer
57 views

Autofocus glitches in Nikon menu for Sigma 18-50 f2.8-4.5 lens

I have sold a Sigma 18-50 f2.8-4.5 OS HSM to an internet buyer. The lens worked fine, but after receiving it today, he said that whenever he turns on autofocus on the lens the camera has a glitch in ...
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2answers
186 views

What to do with a Nikon D750 body that when switching lenses won't autofocus?

There was another similar question out there and one of the responders commented there was and he got his camera body replaced. I've been having the same issue with my new nikon just bought in January....
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0answers
37 views

Menu/Picture Preview NA, Automatic Focus not working

I have a Canon Rebel XSI. It is from 2008. Original everything except lense. I cannot get the menu option to display in any mode, pushing the button does nothing. I cannot get any pictures I recently ...
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1answer
366 views

Autofocus issue in liveview for Tamron 70-300mm

I have been facing autofocus issue with Tamron 70-300mm VC USM lens on Nikon D5300. The camera autofocuses fine through viewfinder but it is not able to autofocus at all in liveview, the lens just ...
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0answers
49 views

Nikon D5600 will not autofocus AF VR ED 80-400mm f4.5-5.6D lens

I think this is actually (sadly) to be expected. Is that correct (manual focus is required)? What modern Nikon cameras will be able to focus this lens? Thanks!
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1answer
89 views

Does the autofocus work only if we touched an AF point on the camera's touchscreen?

As in here, if we touched the area outside that is covered by squares, nothing would happen or what?