I dropped my daughters Nikon d3000 and now all pictures taken are coming out with just stripes. Does anyone know if this is the camera or the lense

if only one of that lens that have problem, probably that lens is malfunction coz the quality of 70-300mm (low end) is not as good as mid-high end lens.

I think you're in for a repair that could be expensive.

Check Nikon tech support at www.nikon.com and see what they advise. I don't think abuse such as dropping the camera is covered under the warranty but Nikon may be able to suggest something that might help you avoid having to send the camera in for repair.

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

If this is a new camera, it should still be under warranty. I suggest you contact Nikon before doing anything else to determine if the repair would be covered under warranty. Nikon also would be in a position to advise you as to what the problem might be so that in the event that the repair is not covered under warranty, you don't replace the wrong thing.

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?

Vivitar makes lenses with a variety of mounts. Assuming the lens in question has a Nikon mount then it will fit perfectly well on a D3000. If the lens has a Canon mount, for example, then it will not fit at all.The lens is a manual focus lens, so autofocus will not work. You'll have to focus by yourself.The lens also lacks the electronics to communicate with the camera. You will have to shoot in the Manual exposure mode, setting the shutter speed and aperture yourself, without any help from the camera's light meter.

The Nikon lens, absolutely.

Quantaray makes their lenses with a variety of mounts. A lens with a Canon mount, for example, will not fit on the D3000. Assuming the lens has a Nikon mount, then yes, it will work with the D3000.

The Nikon D3000 does not have a focusing motor built-in, relying on the lens to have a motor. The Tamron AF 55-200mm does not have the necessary motor; it only auto-focuses with Nikon cameras that have the motor in the camera body.

For Nikon lenses, you need lenses designated AF-S. For Tamron, you need lenses designated USD and/or BIM.

That probably wasn't the answer you wanted to see, but there it is.

ALL Nikon AFS branded lenses are compatible with the D3000. The AF lenses are usable in manual mode. Sigma, Tokina and Tamron lenses without the built-in motor are manual mode as well.
To be sure, check the manufacturer;s websites.
Hope this helps,
Andrew

See my answer to your other post.

One more addition for the D3000. Older autofocus lenses without a built-in motor will not autofocus on the D3000. Only AF-S and AF-I lenses will autofocus on the D3000.