Summary: Rokinon 500 mm telephone lens, overall works great, pictures are sharp and clear. I was surprised with the clarity of the lens. I have two cameras that I use on a regular basis, Olympus E-3 and Olympus E-620, the lens worked great on the E-3 but not so well on the E-620. On the E-3 if you have a fairly steady hand you can hand hold the lens and get crisp clear pictures.
Excerpt: Recommend a tripod for sure ...You can get up close and enjoy one-on-one with some of nature's best kept secretsUsed on Olympus E5 with the adaptor (recommended separate purchase), and it works perfectly.