500mm / 1000mm f/8 Manual Focus Lens is a classic mirror-style T-mount lens that is a welcomed addition to any sports or wildlife photographer's kit bag. It's lightweight and compact and it focuses as...
The Opteka High Definition 500mm preset telephoto lens incorporates not only computer optical design, but also the latest optical multi-coating techniques. The process of multi-coating assures virtual...
Advantageslovely to write with, reliable
AdvantagesEasy and quick to use, pen doesn't dry out quickly
DisadvantagesNot infallible method of detection