Dropped my d3000 camera and now when i turn it on info screen says lens is not attached, changed lens but still get the same message

Yes. Just lock the lens aperture ring at its smallest setting (largest f/number). If you need to change the aperture, change it from the camera body by turning the command dial, the same way as with a lens without an aperture ring.

If you remove the back cover, there is a flexible circuit on the bottom left that attaches to the rear circuit board. Check to make sure that there are not cuts in the lands caused by impact pressing the flex into the back board components. This is a common problem with this model.

Note: replacing this calls for removal of the mirror box. Nikon stopped selling parts on July 13, 2012. You may be able to find it on Ebay.

did you try a different lens if you did send your camera in for repair . the lens gets damaged easy

Promaster makes many different lenses. Some of their older lenses do not have the electronics to communicate with newer digital cameras, and you have to shoot in Manual mode. Could you tell us which lens you're asking about?

If the lens you're using has an aperture ring, turn it to its smallest setting (largest f/number). You can control the aperture from the camera body, the same way as on a lens without an aperture ring.
If the lens does not have an aperture ring, try cleaning the electrical contacts, both on the back of the lens and in the lens mount on the camera body.

Yes. Since the lens does not have the electronics necessary for focusing and metering, you just have to do everything manually. Set the camera's mode dial to M for manual. You can then set the aperture and shutter speed.

No. The converter is intended for certain point&shoot cameras. It is designed to fit in front of the much smaller lenses. The D3000 has interchangeable lenses, so you can simply remove whatever lens you have on it and attach a wide-angle lens.

Lets get you going on this camera. For the lens thing, the 18-55 Nikon lens is a good one. I'm going to assume the lens was loaded while the camera was turned on (not a good idea). What I'm going to suggest is that you make sure the battery has been charged, the camera is off remove the lens briefly and then reinstall it. I know sounds lame but humor me on this one as i don't think the lens totally locked in position, then remove the battery for a few seconds and reinstall it, sort of a hard boot to the camera, turn the camera on. Did you format the memory card always formatted when new and after you have downloaded the pictures to a computer. The language of photography is difficult at times and different manufactures used different terms for the same darn thing. "Formatting" in any language is cleaning the memory card some may call this initializing. Formatting cleans the card and makes it fully compatible with your D3000. You would do this my going to menu, wrench, format memory card select yes then select ok. Takes a few seconds and the card is clean and ready to accept pictures from your camera. To get you going this morning select "P" which is program and the camera does most of the settings for you while you are getting use to it. I would also like to suggest you look into your manual and see how to check the ISO which is an old (from film days) setting for sensor speed, personally I use ISO 100 but until you get use to this camera let me suggest Auto ISO to get there got to MENU > ISO sensitivity settings > Auto ISO sensitivity > ON. the range of the sensor is set by default but can be tuned to your specifications (I'd suggest later) just watch in the viewfinder the shutter speed and if it starts to drop below 1/60 you may need a tripod because the speed has dropped due to not enough light. have fun, have a great day

Clean the contacts on the camera body and the lens where they meet with a cotton swab lightly dampened with rubbing alcohol.

1.the lens is not suitable for newer Nikon DSLR, e.g AI-Nikkor or PC
2.try to clean the mount part at the camera and at the lens with clean-dry cloth
3.probably there`s some malfuntions inside the camera, please refer to your Nikon retailer