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my 35mm is real old school. none of this posh AF stuff all manual. It's a Praktica but i can't remember the model it's about 20+ years old now.
If i went for body only then looked at lenses am I right in thinking that on a 60D a you should multiply the focal length by 1.5 if it's a full frame lens ? So if I went for Sigma 24-70mm f/2.8 IF EX DG HSM I really be getting 36-105mm (ish) or is it not quite that simple?
Also is that lens worth the extra over the kit 15-85mm ?
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