DODGY D300 AUTOFOCUS

merv

merv

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Mervyn
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I was photographing at a friends wedding yesterday and most unnerving thing was happening. When I raised the camera to frame the shot. the camera beeped and the green autofocus light came on by its-self without me touching the shutter release button. At least once the camera fired by itself without me pushing the button.
I had to shoot assuming that the focus had worked even thought the focus ready light had come on by itself. However, I had quite a few out of focus shots and now have lost confidence that the camera is doing things right.
Any opinions or advice?
 
Have you got a grip and did you possibly catch the vertical release?
 
I had this with my Canon! Turned out to be somone else playing with a compatable remote and was pressing all the buttons. Once I turned of my sensor (with the 10 second timer) everything was OK! Just a thought!!




I have a photographic memory that was never developed
 
Yes I do have a grip and anythings possible. Its the autofocus going off on its own is bothering me and it happens at different places. yes at a wedding everyone pushing buttons but it happened at church as the first guests arrived and later on
 
I've got a battery grip on my D300 and the shutter release on it is ridiculously sensitive. You only have to look at it and it fires. I've taken loads of photos I didn't know I had. I'm tempted to speak to Nikon and see if they'll do something about it.
 
If you have it set to continuous focus then the light should stay on!
Same thing with my grip too, very, very sensetive. That button can be turned off though.
 
Glad to see someone else has the problem. I was on single servo, not continuous. If you have any joy with nikon Welly let me know. Where would you get in touch with Nikon>
 
Puddleduck you have a good memory. At the time a few weeks ago I got the sigma 30mm f1.4 and this problem started occurring at the same time. Ken Rockwell did an article on this lens where the focusing system on his nikon misbehaved with this lens and I thought it might be the same problem.
Alas it is now occurring with other lenses and maybe the sigma is blameless and its the camera!! Its now back with jessops!!!!!!!
When i hold the camera up to frame the shot it sometimes autofocuses before I touch the shutter button as I said
 
merv said:
When i hold the camera up to frame the shot it sometimes autofocuses before I touch the shutter button as I said
Click to expand...

Most likely caused as your lifting the camera up to your eye, some how your putting pressure on the grips vertical shutter release.

Let me guess that 'phenomenon' is only occurring when your shooting in horizontal orientation?

I know this because I've done it a gazillion times myself, just turn the vert shutter release button off and Bob's your Dad's brother.
 
Yes i agree i think it may be the vertical button, funnily enough it happened to me on Saturday, i normally keep it turned off but obviously forgot till it went off when i lifted it up to take a shot, if not check the continuous focus button, which has already been mentioned.
 
Can only reiterate what has been said, my grip also has a very very sensitive button. Theres a lock switch on it, try locking it and see if it still does it.
 
Yes I think you're right it always happens in horizontal mode. The autofocus doing its own thing, do you think I'm accidentally touching the AF button on the grip also or possibly the shutter release? certainly not aware of doing this but it is a sensible explanation. Have now locked the shutter release on the grip which I didnt know existed. Thanks all of you four hints:clap:
 
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