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Amazon.com : Opteka 500mm f/6.3 (with 2X- 1000mm) Telephoto Mirror Lens for Canon EF-Mount EOS 90D, 80D, 77D, 70D, 60D, 50D, 7D, 6D, 5D, 5DS, 1DS, T8, T8i, T7i, T7s, T7, T6s,
![Amazon.com : Lightdow 500mm f/8 Telephoto Mirror Lens for Nikon D850, D810, D800, D750, D700, D610, D3100, D3200, D3300, D3400, D5100, D5200, D5300, D5500, D5600, D7000, D7100, D7200, D7500, D50, D60, D90 : Amazon.com : Lightdow 500mm f/8 Telephoto Mirror Lens for Nikon D850, D810, D800, D750, D700, D610, D3100, D3200, D3300, D3400, D5100, D5200, D5300, D5500, D5600, D7000, D7100, D7200, D7500, D50, D60, D90 :](https://m.media-amazon.com/images/I/617TC3evG7L._AC_UF894,1000_QL80_.jpg)
Amazon.com : Lightdow 500mm f/8 Telephoto Mirror Lens for Nikon D850, D810, D800, D750, D700, D610, D3100, D3200, D3300, D3400, D5100, D5200, D5300, D5500, D5600, D7000, D7100, D7200, D7500, D50, D60, D90 :
![Amazon.com : Lightdow 500mm f/8 Telephoto Mirror Lens for Nikon D850, D810, D800, D750, D700, D610, D3100, D3200, D3300, D3400, D5100, D5200, D5300, D5500, D5600, D7000, D7100, D7200, D7500, D50, D60, D90 : Amazon.com : Lightdow 500mm f/8 Telephoto Mirror Lens for Nikon D850, D810, D800, D750, D700, D610, D3100, D3200, D3300, D3400, D5100, D5200, D5300, D5500, D5600, D7000, D7100, D7200, D7500, D50, D60, D90 :](https://m.media-amazon.com/images/I/61TtM+Qv2LL._AC_UF894,1000_QL80_.jpg)
Amazon.com : Lightdow 500mm f/8 Telephoto Mirror Lens for Nikon D850, D810, D800, D750, D700, D610, D3100, D3200, D3300, D3400, D5100, D5200, D5300, D5500, D5600, D7000, D7100, D7200, D7500, D50, D60, D90 :
![Mirror…Mirror… A guide to choosing and using mirror lenses Part 1 – Wayne John Grundy's PhotoTech Blog Mirror…Mirror… A guide to choosing and using mirror lenses Part 1 – Wayne John Grundy's PhotoTech Blog](https://advancedphototech.files.wordpress.com/2010/05/mirror-lenses-19.jpg)