D300 need help with non-AI metering

Started 11 months ago | Discussions thread
ForumParentFirstPrevious
Flat view
bjn70 Senior Member • Posts: 1,290
D300 need help with non-AI metering

I'm using a Nikkor 105mm micro lens with cheap extension tubes and having trouble getting reliable exposure metering. The cheap extension tubes have no AI coupling or anything, just a plain mount. (This is the first time I've tried a non-current lens on the D300.)

When I first got the lens I tried a quick test with it on the camera without the extension tube and the camera on "A" mode. Some photos were good while some were a couple of stops underexposed.

On the front of the lens I've rigged up a tube and holder for slide copying. I tried this with a cheaper macro lens and got reasonable results but with varying exposures so I did some research and with the Nikkor lens I set the data of focal length and maximum aperture in the settings menu. Now I can go though a stack of slides and I still get varying exposures. I will pick up a slide that looks good and the camera will show a shutter speed on the LCD. I'll pick up the next slide which looks darker than normal and the camera might register a higher shutter speed on the LCD when it should register a lower speed. So its metering is all over the place.

Am I missing something in the settings? Is it sufficient just to select the lens number in the settings menu?

This image is from the Nikkor on my copy rig, from a Kodachrome over 30 years old. (Grand Tetons National Park)

<img src="http://i15.photobucket.com/albums/a370/bjd70/Misc/DSC_4212b_zpslbicflnz.jpg">

Nikon D300
If you believe there are incorrect tags, please send us this post using our feedback form.
ForumParentFirstPrevious
Flat view
ForumParentFirstPrevious
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow