Pentax K20D Lenses
The Pentax K20D incorporates the Pentax KAF2 mount and has a APS-C sized sensor. Currently, we have information on 17 lenses that will work with the K20D.
The K20D offers a crop factor of 1.5 so you have to multiply the lens focal length with 1.5 to see it's full frame equivalence. The details below are divided by categories of lenses and you can just click the 
symbol to see how the lens fits the K20D.
We have also developed an Advanced Lens Search so you can easily find your ideal lens.
Macro Prime lenses for Pentax K20D
We have 3 Macro Prime lenses in our database. Complete List is available here.
Venus Laowa 100mm F2.8 2X Ultra Macro APO100mmf/2.8638g
Samsung D-Xenon 100mm F2.8 macro100mmf/2.8 345g
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Venus Laowa 25mm F2.8 2.5-5X Ultra Macro25mmf/2.8400gTelephoto Prime lenses for Pentax K20D
We have 2 Telephoto Prime lenses in our database. Complete List is available here.
Venus Laowa 105mm F2 Smooth Trans Focus105mmf/2745g
Pentax smc DA 300mm F4.0 ED IF SDM300mmf/4.0 1070g
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We have 2 Standard Prime lenses in our database. Complete List is available here.
Samsung D-Xenon 35mm F2 AL35mmf/2.0 195g
Irix 45mm F1.445mmf/1.4925g
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We have 4 Telephoto Zoom lenses in our database. Complete List is available here.
Pentax smc DA 50-135mm F2.8 ED IF SDM50-135mmf/2.8 685g
Samsung D-Xenon 50-200 F4-5.6 ED50-200mmf/4.0-5.6 255g
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HD Pentax DA 55-300mm F4.0-5.8 ED WR55-300mmf/4.0-5.8 466g
Pentax smc DA 60-250mm F4.0 ED IF SDM60-250mmf/4.0 1040gStandard Zoom lenses for Pentax K20D
We have 3 Standard Zoom lenses in our database. Complete List is available here.
Pentax smc DA 16-50mm F2.8 ED AL IF SDM16-50mmf/2.8 565g
Samsung D-Xenon 18-55mm F3.5-5.618-55mmf/3.5-5.6 225g
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Samsung D-Xenon 16-45mm F416-45mmf/4.0 365gSuperZoom lenses for Pentax K20D
We have 1 SuperZoom lenses in our database. Complete List is available here.
Samsung D-Xenon 18-250mm F3.5-6.318-250mmf/3.5-6.3 455gWideangle Zoom lenses for Pentax K20D
We have 2 Wideangle Zoom lenses in our database. Complete List is available here.
Samsung D-Xenon 12-24mm F4 ED12-24mmf/4.0 430g
Samsung D-Xenon 10-17mm F3.5-4.5 Fisheye10-17mmf/3.5-4.5 320g
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