Re: Nikon Lens suggestions

KevinM Wrote:
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> Those who have the components can try it easily.
> Take a DX body and put the 18-200mm DX lens on
> the camera at 200mm. Shoot a picture. Now
> switch to the 70-300mm FX lens, set it to 200mm
> and shoot the same scene. For a given, marked
> focal length, that FX lens has more reach.....1.5x
> more.....than a DX lens.
>
> /Kevin

But that's just not true.

Ken Rockwell's article on crop factor.

From his article:

Digital and film SLR lenses are the focal length as marked. They will see a narrower range on a digital camera, and you can estimate the focal length required on a 35mm film camera to see this same, smaller range by multiplying the focal length by a crop factor, usually about 1.5, which depends on the exact sensor size.

I had an old 50mm 1.4 AI lens that had the same field of view as the 50mm mark on my zoom lens, which is roughly equivalent to a 75mm lens on 35mm film.

- Ryan



Edited 2 time(s). Last edit at 11/20/2015 08:48PM by Ryan Masecar.