Re: Nikon Lens suggestions

Ryan Masecar Wrote:

> [url=http://www.kenrockwell.com/tech/crop-factor.h
> tm]Ken Rockwell's article on crop factor.[/url]
>
> From his article:
>
> [i]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]

A-firmative! That is true.

> 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, you may want to re-read what you just wrote. How could a "old" 50mm lens (presumably from from a 35mm film camera) be roughly equivalent to a 75mm lens on 35mm film?

To really see the difference, you need to try a longer focal length. The difference becomes more apparent as the focal length increases. Try a 200mm DX lens on your DX body and then try a 200mm FX lens on the same body. I've done it right here in my den. That 200mm FX lens still says 200mm, but it has more reach than the 200mm DX lens on that body. It does. Believe it or not!

/Kevin



Edited 1 time(s). Last edit at 11/20/2015 09:37PM by KevinM.