Loose part inside nikkor lens

The D40 is a low end camera, but before you discard it, I would contact the closest Nikon repair depot (see the Nikon website for the location) and ask them for a repair estimate. You will then be able to decide if it is better to have it repaired or replace it with a newer model.

Problem solved the green spots were from the sun use your lens hood thats what its for

these lenses are made with mostly plastic parts to reduce cost. if the lens was bumped on the front it is common to break the cams that move the lens in and out, unfortunately it is more cost to repair versus replace. there should be nothing "loose" inside the lens

the nikkor 18-55 lence is no longer u can chage the ed lence into vr lence is upcomming with nikon d3000 mout the coast of the lens is 200$

Hi!
Usually the diameter is written on the front of the lens. You can use lens with different diameters on this camera, it really depends on the lens, but it will most likely be a 58mm.

Tom

The small black tube piece is a sliding light baffle which has come loose. Zoom lenses are very complicated to disassemble, and you have to have both the knowledge, experience, and the right tools to disassemble a zoom lens.

The tube should never have come loose in the first place, so I would classify this as a product defect. Contact Nikon, fully describe the problem, and insist that they repair the lens at no charge (although you will have to pay to ship the lens to their repair center).

hi ! iam too a D40 holder,u can opt for AF-s versions or HSM sigma,both of them autofocus on d40,can go for 18-200 AFs VR or if u need still longer end go for 70-300 but it is costly than the sigms 70-300APO DG HSM MACRO..,its a much better reviewed lens and dont forget the cost..anyway do some research before considering..good luck

Yes, it will work just fine. I have this lens and my father has basically the same camera (D40) and it works just fine with this lens.

with your D40, you can old go on manual focus on the 70-300mm AF-G/D nikkor.

DON'T TRY TO FIX THIS YOURSELF! You will only add to the damage. If your lens is in warranty, contact Nikon for instructions to get it repaired. If it is out of warranty, I would either pay Nikon for the repair or take it to a camera repair man.