Pentax Screw Mount
Posted on Wednesday, November 18, 2009 in Photography
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.
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Using Pentax m42 mount lenses on Canon EOS system DSLR cameras
Here Are A Few Items From Amazon You Might Be Interested In.
 Pro Optic Screw Mount Lens To Pentax K Body Adapter Sale Price: $15.95  Eligible for free shipping!Availability: Usually ships in 1-2 business days  |
 Canon EOS Mount to M42 Screw Mount Adapter Plate List Price: Sale Price: $9.59 You save: $20.36 (68%) Eligible for free shipping!Availability: Usually ships in 24 hours |
 Fotodiox Chrome Lens Mount Adapter, M42 (42mm x1 thread Mount) Lens to Canon EOS Adapter, for Canon EOS 1d,1ds,Mark II, III, IV, 5D, Mark II, 10D, 20D, 30D, 40D, 50D, 60D, Digital Rebel xt, xti, xs, xsi, t1i, t2i,t3, t3i,300D, 350D, 400D, 450D, 500D, 550D,600D, 1100D, 1000D List Price: Sale Price: $9.95 You save: $29.95 (75%) Eligible for free shipping!Availability: Usually ships in 1-2 business days |
 Bower ABSPK Pentax K Mount to M42 Screw Mount Adapter Sale Price: $24.99 Eligible for free shipping!Availability: Usually ships in 24 hours |
 Fotodiox M42 Rear Lens Cap for 42mm thread lenses, 42mm x1 Screw Mount List Price: Sale Price: $0.91 You save: $6.04 (87%) Eligible for free shipping!Availability: Usually ships in 1-2 business days |
 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 List Price: Sale Price: $5.95 You save: $19.95 (77%) Eligible for free shipping!Availability: Usually ships in 24 hours |
 Mennon DC-s 77 Screw Mount 77mm Flower Lens Hood, Black List Price: Sale Price: $1.39 You save: $13.56 (91%) Eligible for free shipping!Availability: Usually ships in 1-2 business days |
 Mennon DC-s 72 Screw Mount 72mm Flower Lens Hood, Black List Price: Sale Price: $1.99 You save: $12.96 (87%) Eligible for free shipping!Availability: Usually ships in 1-2 business days |
 The Camera Hunter Pentax K Mount Camera to M42 Screwmount Lens Adapter Ring Sale Price: $6.60 Eligible for free shipping!Availability: Usually ships in 1-2 business days |
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