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A bit of history about Canon and catadioptric (mirror) lenses
There's a Nikon 2000mm f/11 on eBay, Complete with a Lens Cap and Carrying Case | PetaPixel
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Canon 800mm f3.8 and 2000mm f11 CAT Lenses
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I found the equivalent of the P900 2000mm in DSLR form.: Nikon Coolpix Talk Forum: Digital Photography Review
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2000 mm: Canon PowerShot Talk Forum: Digital Photography Review
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Amazon.com : Canon EF 70-200mm f/2.8L USM Telephoto Zoom Lens for SLR Cameras : Camera Lenses : Electronics
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This Rare Reflex-Nikkor 2000mm f/11 is the Largest Nikon Lens Ever Made
A bit of history about Canon and catadioptric (mirror) lenses
Canon 800mm f3.8 and 2000mm f11
Canon Might Be Planning Super Cheap Super Telephoto Lenses | PetaPixel
A bit of history about Canon and catadioptric (mirror) lenses
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The Canon TV 2000 mm f/ 11 Lens. Specs. MTF Charts. User Reviews.
Canon EF 200-400mm f/4L IS USM Extender 1.4x Lens Review
Canon announces $17K 800mm F5.6, $20K 1200mm F8 lenses for RF mount: Digital Photography Review
Recommended Ultra-Telephoto Lenses | B&H eXplora
