.what do the designations mean? I'm just starting with Canon and need clarification
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.what do the designations mean? I'm just starting with Canon and need clarification
IS = image stabilization
II, III, etc. = successive versions of that lens
DO = diffractive optics
USM = ultrasonic motor for autofocus
And...
L = luxury, Canon's professional series of lenses
Thanks for the info
EF-S means a lens designed to be used only on the crop bodies, excluding the 10D. So XT, XS, T3, XTI, XSI, T1i, T2i, T3i, 20D, 30D, 40D, 50D, 60D, and 7D.
"S" (as in EF-S) are lenes that are designed for 1.6X crop body (also sometimes designated as digital only). That would be any rebel or the semi-pro bodies starting with 7D and higher numbers (e.g., 20D, 30D, 40D, 50D, and 60D). The EF-S lenses are not designed for the 5D and 1D cameras.
If I got any of that wrong, then someone please correct me.
I'd brought up the white squares or red circles denoting compatibility.
I think that's all of them for Canon lenses.
Now just don't ask anyone to decode a Tamron lens name...
Good luck, it feels like they add 14 abbreviations at the end of every lens just to make things interesting! Just one more reason to buy Canon!:pQuote:
Originally Posted by Dr Croubie
Canon EF 70-200mm f/2.8L IS II USM
EF: Electro-Focus (I think)
L: Luxury (I don't see anything luxurious about owning a lens)
IS: Image Stabilzation
II: version two, second generation
USM: Ultra Sonic Motor, your lens autofocus motor