Tip & How-To about Nikon DSLR D90 Digital Camera

How to manually adjust the aperture in video mode on the Nikon D90

When working with a AF-D type lens mounted on the D90, you can manually adjust the aperture during video production. In order to do this, lock the aperture at f/22. Turn on live view. Once in Live-View mode, you may unlock the aperture and adjust it during video-taking. You may NOT take a still image when doing this. This feature creates very pleasing videos with out-of-focus backgrounds, and is a very useful tool.

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Message: Lock lens aperture ring at minimum aperture (largest f-number) I think I'm doing this but the message won't go away and the camera won't work.


You must lock the aperture ring to f/22, so the camera can engage the aperture adjustment lever on the lens. Then, you can change the aperture with the command wheel.

When you change the aperture with the command wheel the aperture ring on the lens doesn't move when the camera actually adjusts the lens aperture.

Take the lens off and locate the aperture adjustment lever on the lens mount.

Unfortunately, this won't work with older AF lenses. So if you are using an older lens, the only thing you can do is change the camera setting to M (Manual) to adjust the aperture on the lens yourself.

May 16, 2011 | Nikon D60 Digital Camera

1 Answer

Does the Nikon - Nikkor 50 mm F/1.8 AF lens work with a D90? Sorry, Im a newbie, but I am looking at buying this lens, and would really like it to auto focus. I think it should, I just want to be sure before I spend the money.


Yes. I have one and it works perfectly on my D90. If you get the version with an aperture ring, be sure to set the aperture to its smallest setting (f/22) and lock it. You control the aperture from the camera, the same way as on a lens without an aperture ring. If you get the version without an aperture ring, don't worry about it.

Feb 13, 2011 | Nikon Cameras

1 Answer

I have a D90 Nikon, I mounted my Nikkor 50mm 1.8d


Make sure you set the aperture ring on the lens to its smallest setting (largest f/number) and lock it. Without doing so, the lens will not communicate properly with the camera and thus you will not get the autofocusing.

May 30, 2010 | Nikon Normal AF Nikkor 50mm f/1.8D...

1 Answer

Error message shows F -- with lens attached. Lens was cleaned with compressed air, now willnot work. Lens type Nikon 28-80 AF


Check to see that the lens aperture ring is set to the smallest (largest numerical) aperture setting (usually f22 or such). Nikon AF cameras have to have their lenses set at the smallest aperture for most of their program modes to work. Nikon AF lenses have a small slide or twist lock adjacent to the aperture ring to lock it in place at the smallest aperture. This may have been unlocked during the cleaning.
Another possibility is that the lens's electrical contacts were damaged during cleaning, so the body is not "seeing" the lens. Do you have another lens you could attach to the body to test this theory?

Aug 06, 2009 | Nikon N50 35mm SLR Camera

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