Question about Nikon D300 Body Only Digital Camera

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Shutter drag problems

Recently I noticed that my shutter is releasing slowly regardless of my shutter speed. I have not done anything new and different except load the new firmware as recommended by Nikon. Any thoughts?

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Check to see if somehow the "noise reduction" setting is on. This in effect takes two separate exposures on each shutter release, so it (sometimes) doubles the time the mirror is up. I'm not sure where it is in the menus on a D300.

Also, just a terminology point, but the "shutter" in this camera is a combination of the mirror (what we usually call the shutter) and the electronics which samples the sensor for a limited time. It's a little like the mechanical shutter on a film camera that was behind the mirror....back in the day when they made them from titanium.

The "so what" of this is that even if it sounds like it's not releasing as fast as it used to, the exposure can still be accurate if the electronics are sampling correctly. It's only when moving to slow exposures that the mirror speed/up time makes a difference.

Posted on Sep 28, 2009

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Set the aperture at F5.6 and the shutter speed at the lenses fastest speed **** it and fire. Move the shutter speed to the next slowest **** and fire and again and again until you get to say 1/100 then start going back up the speeds again fire it again move to the next speed fire it and so on.

After the buyer has gone through the sequence at least three times there should be an improvement in the shutter sound if there is continue the sequence another three time. Then the ultimate test is to set the shutter for its 1 second time **** and fire it if it drags and hangs up then the grease inside has dried and there is no other way then to send the beauty to a competent repair person for a clean lube and adjust. Best of luck with that, I'm still using some old Kodak lenses from the Graflex Speed Graphic era and producing beautiful 4x5 chromes. People these days just don't understand everything has got to be digital. Okay well the very best

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By "stayed up", do you mean that the mirror remained in the up position so that you could not see anything in the viewfinder or do you mean that the shutter actually remained open? I do not remember the exact features on your camera, but in general, this is what I would do.

1) Remove the film from the camera and take a picture. Note if you see anything in the viewfinder. If you see nothing, the mirror is in the up position. Verify this by removing the lens and opening the door on the camera back. Look through the lens hole. If you can see through the rectangular hole at the film plane, the shutter is open. If instead you something is obstructing the hole, the shutter is closed. In any case DO NOT TOUCH THE SHUTTER! The shutter is what is covering the hole.

2) If the mirror is in the up position, check to see if your camera has a feature that allows locking the mirror in the up position. Some cameras have this feature to allow use of lenses with very short focal lengths. If this is the case, simply unlock the mirror.

3) If the shutter is the problem, your shutter speed may be set to "T", which stands for time. In the time exposure mode, you press the shutter release once to open the shutter and a second time to close the shutter. Cameras with a "T" setting also have a "B" setting, which stands for bulb. This is a throwback to the old days when it was common to use air-powered shutter releases rather then cable releases. The bulb was a rubber bulb that you squeezed to force air through a tube and push a pin to activate the shutter. The "B" setting keeps the shutter open as long as you hold the shutter release in, but as soon as you take your finger off the shutter release, the shutter closes. Both of these settings are used to make timed exposures. If you find that the problem was that the shutter was set to "T", set the shutter speed to 1/25th second or so and try again. The following sequence should occur; the mirror will flip up and the viewfinder image will disappear, the shutter will open for the prescribed time and close, the mirror will return to the down position and you will again see through the viewfinder.

If this does not work, you may need to take it in for repair.

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