Kenko 2x Teleplus Pro 300 DGX for Canon EF Teleconverter 5 EL-Omegar is an enlarging

5 EL-Omegar is an enlarging lens for medium format

Covers 4x5 without breaking a sweat

2 lens for Canon EF mount

which seems to be A Thing with these lenses

ISO settings to 25600

Kenko 2x Teleplus Pro 300 DGX for Canon EF Teleconverter 5 EL-Omegar is an enlargingThe Kenko 2x Teleplus Pro 300 DGX is a modern, high quality teleconverter for Canon EF cameras and lenses. Compatible with many (but not all!) EF mount telephoto lenses: compatibility is broader than Canon's own teleconverters, but not universal. Kenko has some compatibility information here: https: kenkoglobal. com support teleplus . In excellent condition, with original box. General reminder: most DSLRs will only autofocus lenses with an f5. 6