by ʇolɐǝz ǝɥʇ qoq

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I purchased an older 50mm prime lens to use on my Nikon D3100. I know it will not meter or focus (and I can handle manual focus and exposure etc.) but I cannot get it to fire the on-camera flash. Any ideas?

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I don't know Nikons, so I'm posting as a comment, but is there a way to put the flash in a manual mode? Without metering, TTL isn't going to work, so you'd have to manually set flash power too. – AJ Henderson Oct 4 '13 at 17:55

I use a Nikon D3000 which should be similar.

In the camera menu (shooting menu, I think) you can control the power of the flash manually. Change the flash to manual rather than TTL, then set the power you would like (e.g. 1/2, 1/4, etc.).

It's slow, and I can't think of a quicker way for the on-camera flash, but it will at least allow you to use it.

Please let me know if that works. Good luck.

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