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11-14-2009, 09:14 AM   #1
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AF-540FGZ zoom stuck at 16mm??

Anyway to reset the AF-540FGZ? In P-TTL (or any mode for that matter), auto zoom is stuck at 16mm (and it is flashing). No way to change it. When this flash works, it is awesome, but I have had too many issues with it.

11-14-2009, 09:25 AM   #2
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so do you mean even you are using a 50mm lens it doesn't auto zoom the flash when you half press the shutter button?
11-14-2009, 09:45 AM   #3
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QuoteOriginally posted by vizjerei Quote
so do you mean even you are using a 50mm lens it doesn't auto zoom the flash when you half press the shutter button?
Right, it doesn't matter what lens is on the camera. Auto Zoom is 16mm, regardless. I cannot even engage manual zoom.
11-14-2009, 09:59 AM   #4
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Interesting... I read some others with similar problems - sometimes caused by the wide angle panel not being in the proper position. Now, after playing with that, its stuck on manual zoom - 13mm.

11-14-2009, 10:12 AM   #5
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oh no.. time to send it to fix.
11-14-2009, 01:11 PM   #6
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I am having a similar problem with my AF-360-FGZ. When I turn it on, it makes a high pitched humming noise for a few seconds. Then it won't zoom (both auto when the focal length is changed on the camera and when pressing the zoom button).

I tried changing the batteries, but no luck.
11-14-2009, 01:19 PM   #7
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QuoteOriginally posted by vizjerei Quote
oh no.. time to send it to fix.
I bought this used from B&H. I think I need a refund. Hopefully they can work with me and get this resolved.
11-14-2009, 02:02 PM   #8
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The contacts in the wide-angle panel think the panel is out.

Pulling the wide-angle panel out and pushing it back in several times may fix the problem.

I think it's pretty simple to fix because the cause is just mechanical, not electronic. If you want to give it a try, this thread may help: Linky

you can see the switch in one of the photos.

11-14-2009, 05:27 PM   #9
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QuoteOriginally posted by SOldBear Quote
The contacts in the wide-angle panel think the panel is out.

Pulling the wide-angle panel out and pushing it back in several times may fix the problem.

I think it's pretty simple to fix because the cause is just mechanical, not electronic. If you want to give it a try, this thread may help: Linky

you can see the switch in one of the photos.
I really appreciate the response and the link. I *may* give it a shot. I am going to spend some time tonight trying to get this resolved, if not hopefully I can return it.
04-03-2012, 05:08 PM   #10
Brooke Meyer
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Fixed Pentax 540 that wouldn't zoom

Tonight, found one my Pentax 540's stuck at "16mm", would not Zoom. Read this old thread, cycled the Diffuser panel a few times with no change. Powered down flash and tapped the flash head a few times with a plastic handled screwdriver. Turned on flash and it worked! Must have been a stuck or dirty switch. This old thread led the way.
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