sorry for asking such a newbie question, but what's the diff for digital lenses and normal lenses? i know using normal lenses on DSLRs give it a 1.5x magnification. right? (so eg. for nikon, sorry i know nuts bout canon, a non-DX 18-70mm on DSLR = effective 27-105mm. correct me if i'm wrong)

so a DX lens, say, the new 18-200mm on a DSLR will give effective range of 18-200mm issit? is that what DX means? then if u use on SLR what range it become?

thanks.

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