This **0mm Manual ultra-telephoto,
multi-coated mirror lens is ideally suited for sports and wildlife
photography.
It has a fixed aperture of f/8.0 which is faster than most other
**0mm lenses.
6 Elements in 6 groups.
This combination provides the user with an extremely sharp picture
with minimum color aberration.
Manual Focus, Fixed Circular Aperture.
Compatible with Most SLRs and DSLRs.