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Posted by joel rosenthal on 18:27:08 02/02/08
In Reply to: Re: Focal length posted by John Boyd
The difference between cropping oneself, in an enlarger or on a computer, and what a dslr crop camera does is that the crop camera gives you no choice--so your 500 mm in a Canon 40 D or 10 D or 20D-is the effective equivalent of a full frame 800mm . Because the camera does it for you, I think you can legitimately say you're using the equivalent of the larger lens--cropping further in the darkroom or computer, becomes comparing apples and oranges--at least this lawyer would make that distinction.
And some would say that the quality of the optics are just as important to image quality in a DSLR as pixel density(which I also understands affects noise as much as ISO setting).
And unless you are being modest about your camera, or they sold you a cheap Chinese imitation, or you misspoke, your Canon 40D has a 1.6 crop...
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