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Pentax Screw Mount

Posted on Wednesday, November 18, 2009 in Photography






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Pentax Screw Mount 2
pentax 50/1.4?

I'm looking for a fast pentax lens to use for portraits. I have an *ist dl with only the kit lens right now. I've seen many 50/1.4 lenses on ebay for a reasonable price, but I'm new to digital photography and am somewhat confused by the focal lengths. Will the 50mm actually be a 75mm on my *ist? Does the FA 50/1.4 that pentax makes for digital cameras have a focal length of 50mm and is it the same focal length as the older 50/1.4 with the M42 screw mount?

You're right on both counts.
The *ist DL has a 1.5 field of view crop, so a 50mm lens will effectively be 75mm.
And all (d)SLR lenses state the focal length as though used on a film body - even lenses made specifically for digital bodies.

Whats On My YouTube Today?

Using Pentax m42 mount lenses on Canon EOS system DSLR cameras

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Fotodiox Lens Mount Adapter, Black M42 (42mm x1 thread Mount) Lens to Canon EOS DSLR Adapter, fits Canon EOS 1d,1ds,Mark II, III, IV, 5D, MarK II, 7D, 10D, 20D, 30D, 40D, 50D, 60D, Digital Rebel xt, xti, xs, xsi, t1i, t2i, 300D, 350D, 400D, 450D, 500D, 550D, 1000D
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