Review on 📷 Opteka 500mm f/6.3 Telephoto Mirror Lens with 2X- 1000mm for Canon EF-Mount Cameras by Nate Mims

Replaces an old Opteka 500mm catadioptric lens that was lost in a flood. Small cosmetic and functional improvements have been made in recent years, so Opteka has not neglected this lens. While it produces decent images, no one would mistake the results for a $1,500 lens. But its compact size (and doubling the focal length) make it a realistic candidate for casual shooting, particularly of wildlife where a large lens mass can be a disadvantage. It's often criticized in reviews for its f/6.3 aperture, but with digital cameras it can be used at ISO 12,500 and above, it's an empty handle. Fossils like me remember ISO 100 and ASA 25 days.