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Mystery Switch on D3100
Mar 21, 2013 20:55:15 #
I've found a tiny pressure switch on the front of my Nikon D3100, just outside the lens mounting flange. It is not depressed by gelded lenses or the body cap, but is depressed by a non-Ai lens. Does this maybe have something to do with deactivating the electronic aperture control?
This does not even show in the manual illustrations.
This does not even show in the manual illustrations.
Unidentified Switch
Mar 21, 2013 21:05:46 #
So what happens if you depress it manually with a lens that doesn't press it?
Mar 21, 2013 21:12:29 #
As far as I can tell, all settings seem to work the same in both manual and auto modes whether the switch is pushed in or not.
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Mar 21, 2013 21:37:32 #
It has to be telling the camera something. Any differences in menu items?
Mar 21, 2013 21:45:15 #
Looks to me like that switch tells the camera that a non-gelded lens (one with an aperture ring) is set to its smallest aperture. Both my D3100 and D50 have it, but my D7000 doesn't. The D7000 allows you to use a lens that has an aperture ring and use it rather than the command dial.
Mar 22, 2013 00:31:17 #
Mar 22, 2013 01:29:27 #
Nikonian72 wrote:
*
That's the same response I've gotten from Nikon so far.
Mar 22, 2013 04:34:20 #
Mar 22, 2013 10:06:47 #
Nikonfan70
Loc: Long Island
I just took a few shots with and without the switch depressed with a 55-200vr lens.55mm f 1/60 f4.2, ISO 1800, auto exposure. Nothing changed.
Mar 22, 2013 10:15:26 #
The switch will be depressed by the aperture ring of a non-G type lens being set to the smallest aperture, thus telling the camera that auto-aperture control is possible throughout the aperture range. Thus is would be possible to use P, A, Tv (S) or M with full auto-iris function.
Mar 22, 2013 10:33:15 #
Pushing a switch with no reason? LOL. I was a Army helicopter instructor pilot. I had a brand new student who flipped a switch to see what would happen. It activated "Boy, you're in trouble now" mode.
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Mar 22, 2013 11:04:15 #
Clif
Loc: Central Ca.
That little steel pin in on my old Nikon F from the mid 60's. It could deactivate the stop-down feature when you check depth of field. But I never felt the need to play with it to find out. I may need to now.
Mar 22, 2013 11:40:43 #
Nikonfan70
Loc: Long Island
Chopper driver.
I was a guidance officer in a Pershing nuclear ballistic missile battalion. I know what dangerous Buttons are. A camera button is not one of them
I was a guidance officer in a Pershing nuclear ballistic missile battalion. I know what dangerous Buttons are. A camera button is not one of them
Mar 22, 2013 12:04:26 #
Xtreme and Graham, I think it's coming to light. I'm limiting my thinking to what I have on hand. When you say non-G lenses, I'm assuming now that you're talking about newer non-G's that have both an aperture ring and electrical contacts? My only lenses are either gelded or really old non-AI, which would mean that switch would do nothing with either of those. Starting to make sense now. Thanks.
Mar 22, 2013 12:12:33 #
Bret.....ding, ding, you lose. What the h*ll is a range indicator switch?!
And you other guys, FOCUS! These threads can drift off-topic quicker than...
I knew a few chopper pilots I trusted to fly with. Considering a helicopter only has two propellers, a big one and a little one, I'm sure that half of those gazillion switches are just there to justify the amount of money they make.
And you other guys, FOCUS! These threads can drift off-topic quicker than...
I knew a few chopper pilots I trusted to fly with. Considering a helicopter only has two propellers, a big one and a little one, I'm sure that half of those gazillion switches are just there to justify the amount of money they make.
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