Schneider Tele-Variogon F4 80-240mm M42 Pentax Screw Mount Zoom Lens
The Perfect VINTAGE Fish-Eye Lens | Zenitar MC 16mm - YouTube
1pc 52mm 0.35x Hd Super Wide Angle Panoramic Macro Fisheye Lens For Nikon D5,d4,df,d850,d810,d750,d610,d500,d7500,d7200,d5600 - Camera Lenses - AliExpress
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
Fisheye-Takumar 17mm f4 in M42 Mount. | eBay
Zenitar 16mm Fisheye
Wholesale M42 Fixed Focus Fisheye Lens for DSLR Camera From m.alibaba.com
ZWO 1/3″ 2.1mm 150 degree lens – ZWO ASI
Amazon.com : MEKE Meike 6.5mm f/2.0 Ultra Wide Circular Fisheye Lens for Fujifilm X Mount Mirrorless APS-C Camera X-Pro2 X-E3 X-T1 X-T2 X-T10 X-T20 X-A2 X-E2 X-E2s X-E1 X30 X70 X-M1 X-A1
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Best M42 prime lenses for $150-350. From Fisheye to Telephoto vintage lenses. - YouTube