F100 AF not working

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abhijitsarkar
abhijitsarkar Regular Member • Posts: 290
F100 AF not working

I purchased a F100 last year, took it out a few times, and put it in storage. Took it out today, put in batteries and film, but the camera won't auto focus. I've changed the batteries, changed the lens, to no avail. My settings are as follows:

Focus mode C. Also tried with S.

CSM 4-1 (release priority). Changing this to 0 makes no difference to focussing, but the camera won't take a photo since it can't achieve focus.

AF area mode: Dynamic AF

The focus indicator lights up when the press the AF-ON button. However the lens doesn't auto focus.

I suspected that I might need new batteries, but the battery indicator shows full charge. I've put in some used batteries, and the indicator dropped, so it appears to be working.

What could be the issue?

 abhijitsarkar's gear list:abhijitsarkar's gear list
Nikon D780 Nikon AF-S Nikkor 16-35mm F4G ED VR Nikon AF-S Nikkor 85mm F1.4G Nikon AF-S Nikkor 24-120mm F4G ED VR Nikon AF-S Nikkor 28-300mm f/3.5-5.6G ED VR +3 more
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