from my tumblr blog
via Flickr http://flic.kr/p/C2TS8Z
In 1992, I gave in to curiosity and lens lust and purchased the 600mm mirror lens from Sigma. The front element has a mirror (in reverse) at its center, forcing the light to travel three times through the lens and thereby allowing for a compact and relatively inexpensive design. 117 more words
Great tit with a grain of wild sesame in its mouth.
Have a nice weekend, my friends ! via Tumblr http://ift.tt/1MVs9Ox
600mm Rod is huge, and to get a high quality Acetal Copolymer rod that is 600mm diameter is huge. That is over 24 inches, yes, 24 inches. 18 more words