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Canon EF 11-24mm f/4L USM Verdict. Those simply looking for a high quality wide angle lens, may be looking a this optic with great interest, and the high levels of sharpness, reasonable distortion
Any lens you mount on a crop camera needs to 1.6 multiplication to find it's equivalent focal length compared to the 24mm x 36mm Full Frame format. You said the 24mm 2.8 and 28mm 1.8 are "wildly different". They are not. On a crop camera the EF-S 24mm is equivalent to 38.4mm and the 28mm is equivalent to 44.8mm.
Canon calls this the CANON MACRO LENS EF 100mm f/2.8 USM: MACRO: Focuses to just a few inches. EF: "Electronic Focus," meaning that there is an autofocus motor in the lens itself. All Canon lenses since 1987 have been EF. USM: Ultra-Sonic Motor, meaning AF is almost silent. Optics specifications top
EF 11-24mm f/4L USM: EF 16-35mm f/2.8L USM: EF 16-35mm f/2.8L II USM: The Digital Lens Optimizer is also available for images shot with an extender attached to a
Released back in 1988 the Canon EF 24mm f/2.8 is one of the oldest Canon EF lenses but it is still part of the current line-up. On APS-C DSLRs such as the EOS 350D/Digital RebelXT (as usual used for testing) the moderate ultra wide-angle lens is transformed into a moderate wide-angle equivalent to about 38mm.
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canon ef 24mm f 2.8 is usm lens review
