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Shutter speed "changes"
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Jul 28, 2023 11:19:38   #
kb6kgx Loc: Simi Valley, CA
 
srt101fan wrote:
Full Manual?

Or did you have Auto ISO on?


Full. Auto ISO was turned off.

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Jul 28, 2023 11:27:21   #
gwilliams6
 
mikeroetex wrote:
. The ker-chunk is probably VR turning off. As for shutter speed, sounds like you are in (P) program mode. Or (A) Aperture mode and SS is changing when you point at a differently lighted scene.


Exactly my thoughts also.


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Jul 28, 2023 11:34:54   #
kb6kgx Loc: Simi Valley, CA
 
riderxlx wrote:
What happens when you raise the camera back up to the position that you were shooting the moon it did it switch back or did it change and adjust to the new light setting. Just curious that’s what I would do.
Bruce.


No, stays at the speed it changed to. For example, I set it at 1/500, it'll change to 1/2000.

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Jul 28, 2023 11:35:26   #
kb6kgx Loc: Simi Valley, CA
 
Longshadow wrote:
Ahhh, yea.
Gonna be lotsa guesses with so little information...


What more information do you want?

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Jul 28, 2023 11:36:37   #
kb6kgx Loc: Simi Valley, CA
 
mikeroetex wrote:
. The ker-chunk is probably VR turning off. As for shutter speed, sounds like you are in (P) program mode. Or (A) Aperture mode and SS is changing when you point at a differently lighted scene.


Didn't think of that. The VR most like WAS left on. Definitely NOT in "P", "A" or any other mode. Everything is totally in Manual.

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Jul 28, 2023 11:38:33   #
BebuLamar
 
srt101fan wrote:
Full Manual?

Or did you have Auto ISO on?


If the camera is in Manual and auto ISO it only changes the ISO and not the shutter speed.

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Jul 28, 2023 11:40:35   #
kb6kgx Loc: Simi Valley, CA
 
BebuLamar wrote:
If the camera is in Manual and auto ISO it only changes the ISO and not the shutter speed.


NOTHING was in Auto. I definitely turned Auto ISO off.

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Jul 28, 2023 11:59:49   #
BebuLamar
 
kb6kgx wrote:
NOTHING was in Auto. I definitely turned Auto ISO off.


I said even if it's in Auto ISO the shutter speed doesn't change. I am not sure if auto bracketing can change shutter speed in manual mode as I never use it. Otherwise in M shutter speed doesn't change. So unless you accidently touched something the camera is defective I would say.

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Jul 28, 2023 13:16:20   #
mikeroetex Loc: Lafayette, LA
 
BebuLamar wrote:
I said even if it's in Auto ISO the shutter speed doesn't change. I am not sure if auto bracketing can change shutter speed in manual mode as I never use it. Otherwise in M shutter speed doesn't change. So unless you accidently touched something the camera is defective I would say.

There are only three factors you can control on that camera. Shutter speed, aperture, ISO. If auto ISO is turned off, you must be in aperture mode or auto mode or program mode for the shutter speed to change when the camera points to a brighter or darker area. It is always possible that your wheel is loose and that A is very close to M you could possibly be encroaching on the A instead of M for Manuel.

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Jul 28, 2023 13:38:08   #
User ID
 
gwilliams6 wrote:
Exactly my thoughts also.



Think your "exact" thoughts, but do read what the OP has told us, which is manual exposure & iso.

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Jul 28, 2023 14:50:43   #
kb6kgx Loc: Simi Valley, CA
 
BebuLamar wrote:
I said even if it's in Auto ISO the shutter speed doesn't change. I am not sure if auto bracketing can change shutter speed in manual mode as I never use it. Otherwise in M shutter speed doesn't change. So unless you accidently touched something the camera is defective I would say.


We’ll see what camera shop guy has to say.

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Jul 28, 2023 17:41:14   #
wdross Loc: Castle Rock, Colorado
 
kb6kgx wrote:
We’ll see what camera shop guy has to say.


With total manual setting and auto ISO off, there is either an unknown firmware instruction that would override what most of us would expect to stay put or your firmware / camera now has a "bug" of some sort. A call to Nikon's tech people or the "camera shop guy" is called for. Also remember that the camera shop guy may not have an answer for you while the Nikon tech guys may have seen this "problem" before.

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Jul 28, 2023 18:53:43   #
BebuLamar
 
There is one thing the OP should be careful because I believe the problem doesn't happen often. With the intermittent problem a lot of time the repair shop guy simply sends the camera back and not fixing the problem.

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Jul 28, 2023 23:48:49   #
kb6kgx Loc: Simi Valley, CA
 
wdross wrote:
With total manual setting and auto ISO off, there is either an unknown firmware instruction that would override what most of us would expect to stay put or your firmware / camera now has a "bug" of some sort. A call to Nikon's tech people or the "camera shop guy" is called for. Also remember that the camera shop guy may not have an answer for you while the Nikon tech guys may have seen this "problem" before.


Good point. I'll try calling on Monday.

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Jul 28, 2023 23:52:47   #
JD750 Loc: SoCal
 
kb6kgx wrote:
I was outside the other night trying to photograph the Moon. I would take my shot, and then lower the camera down to check the image on the screen. As I'm lowering the camera, I hear and feel a "kerchunk". Probably something in the lens which, I hope, is normal? I then noticed that the shutter speed had changed from what I had it set at. This happened multiple times, sometimes to a higher speed, sometimes to a lower speed. I definitely did NOT rotate the control wheel.

Camera is a Nikon D7100 and the lens is the Nikon 70-300mm f4.5-5.6G ED-IF (the FX version).

Is this something I should be sending in to Nikon to have them look at or is this a normal thing?
I was outside the other night trying to photograph... (show quote)

I am not a Canon expert. But I have used many cameras in my life, including Canon. The "kerchunk" sound could be the lens exiting IS and parking. There are "lots of knobs" on modern cameras. That can be frustrating. What you describe could be a knob in the wrong setting. Do you have a camera store near you that sells Canon? If so I recommend you make a trip there and discuss this issue with them.

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