Hi all,
I am new to all this & to beging i have bought a Nikon D3200 HDSLR, which i have read has DX format sensor. i am thinking of buying a Nikon AF Nikkor 50mm f/1.8D Lens but as i read that it is FX format i thought i'd better ask on the forum before buying. are FX format lenses compatible with DX format Camera.
Since the D3200 does not have its own focus motor, it will only autofocus with lenses that include a focus motor in the lens. Any Nikon lens that is designated as “AF-S” or “AF-I” meets this requirement, and is in every way, fully-functional with the D3200.
FX lenses will work just fine on a DX camera. The issue that arises there comes from going the other way, putting a DX lens on an FX camera. A DX lens is only designed to cover the smaller DX sensor, and if used on an FX camera, will result, at least, in vignetting, and even rounding off of the corners and sides of the image. The only reason you should care about the distinction between DX and FX lenses is if you anticipate ever upgrading to an FX camera, in which case, you'll want to buy FX lenses n order to be able to fully use them on the FX camera.
There's another issue about which you ought to be aware. Perhaps you are looking at the 50mm lens, because you are under the impression that it is a “normal lens”, that will give an angle of view that approximates that of the human eye. That's only true if it is mounted on an FX camera. On a DX camera, is is a bit more of a mild telephoto lens. Remember that with a smaller sensor, you have to proportional scale down the lens focal length, to get the same angle of view. The “normal lens” for a DX camera would be around 28mm to 35mm.
and one more thing what is a UV lens filter as i am getting an offer of a free UV lens buy paying little more money
any help would be appriciated [sic]
Ostensibly, it is a filter to cut out ultraviolet light, which, in film cameras, could otherwise adversely affect the sharpness of the image. I don't know if that was ever really a significant issue with film cameras, and I understand it to not be an issue at all with digital cameras.
The real reason I had UV filters on all my lenses, back in the film days with my F2, and now with my D3200, is to protect the lens from damage. Should something happen that would otherwise damage the front element of my lens, it will instead damage a filter that is much cheaper and easier to replace than the lens.