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Amazon.com : Pentax DA 50mm f1.8 lens for Pentax DSLR Cameras : Digital Slr Camera Lenses : Electronics
Re: Pentax-A 50mm f/1.7 SMC Vs Pentax SMCP-DA 50mm f/1.8: Pentax SLR Talk Forum: Digital Photography Review
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Amazon.com : Pentax DA 50mm f1.8 lens for Pentax DSLR Cameras : Digital Slr Camera Lenses : Electronics
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