Yes. Make sure you purchase your sigma lens with the F-bayonet. Here is their lens finder: see related link
Yes but older AF lenses that do not have an autofocus motor in them will not autofocus with the D5000.
It depends on the brand of camera and the type of lens. Most Nikon film SLR lenses will work (in manual mode) on their digital SLR cameras. Many Canon lenses will work on new Canon SLR cameras, but you have to check compatability between the camera model and the type of lens. Sony purhcased the Minolta digital camera division, so all Sony Alpha DSLRs will use Minolta lenses.
Generally, no. Each manufacturer has proprietary mounts for their lenses and, for example, Nikon lenses will not fit a Canon and so on. There are aftermarket lenses made to fit various cameras, but you need to specify the make and even sometimes the model of the camera in order to get a mount that fits.
It just works!
Actually no they won't. I don't konw alot about canon cameras. but one thing I do know is that it prabably won't work. Just get a Canon flash or a Sigma flash.
They are not.The exposure meter won't work with the ais lenses. They will work fine if you get the exposure right from trial and error, use a light meter, use experience or meter with another lens first though.
DX type lenses are made specifically for Nikons digital SLR cameras. The optics are designed for use on their APS-C digital sensor which is smaller than 35mm film frames. FX type lenses are "Full Frame" lenses meant to go on 35mm film cameras as well as Nikon's line of full frame digital SLRs like the D700 and D3Xs. DX lenses cannot be used on full frame cameras without vignetting of the frame (darkening of the corners to varying degrees), even though they have the same mount and can be attached and function properly. This is particularly noticeable with wide angle lenses. FX lenses will work just fine on DX bodies but the magnification of the lens will need to be multiplied by a factor of 1.5 to give you a true indication of the lenses magnification. (A 50mm FX type lens, on a DX camera, yields a magnification equivalent to a 75mm lens on a regular full frame body.)
The AF 'A' Mount Minolta lenses work on the Sony, also sigma and tamron do a range of lenses to fit Sony Alpha models.
A Nikon EM has a standard Nikon mount, so you can use any lens that'll fit on a Nikon, except for a Nikon Series G lens, on an EM. A Series G will fit but it won't work because there's no aperture ring.
All EF series lenses will work with the film Rebel or any other EOS film body. EF-S lenses are not compatible with film cameras or full-frame digitals.
Yes, it will fit. However, you will still need to see if the lens you have has or does not have features like autofocus or CPU connectors that will carry all the info that your camera needs... If it is a Nikon Lens it will work fine. So will others like Sigma, Tamron and Tokina. Carl Zeiss may not give you all the functions but will work in manual mode.
The Canon Rebel film bodies use the EF mount lenses. All modern Canon EOS cameras, including all digital EOS cameras will also accept EF mount lense. The EF and EF-S lenses are compatible with the Rebel series. However, the lenses that typically come with a Rebel (EF-S) are compatible only with Canon cameras that have a 1.6 crop factor. Cameras with the 1.3 or no crop feature will not accept the EF-S lenses. The lens mounts deeper than the mirror will tolerate.