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Amazon.com : PENTAX DA 10-17mm f/3.5-4.5 ED (IF) Fish-Eye Lens for Pentax Digital SLR : Camera Lenses : Electronics
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SMC Pentax 67 / S-M-C Takumar 6x7 / Takumar 6x7 35mm F4.5 Fish Eye Reviews - 67 Wide-Angle Primes - Pentax Lens Reviews & Lens Database
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Pentax 17mm f/4 Fish-eye-Takumar Manual Focus Lens for M42 Screw Mount {Built-In Filters: Y48(Y2), L39(UV), 056(02)} at KEH Camera
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