The Nikkor 500mm f4 P IF-ED AI-P & the Nikkor 600mm f4 IF-ED New AI-S are both sharp wide open and do well on digital bodies.
There are also few 400mm Nikkors that have excellent performance on digital bodies.
The Nikkor 400mm f2.8 IF-ED AI-S and the 400mm f5.6 ED or P.C. versions.
Third party lens builder Koburi built a very solid 120-600mm f5.6 that does fairly decent...these were usually sold by Vivitar and Soligor gmbH (Germany)...the Vivitar 120-600mm f5.6 version can usually be found on ebay cheap.These are fairly sharp at the long end. http://www.pentaxforums.com/userreviews/vivitar-120-600mm-f-5-6-8-zoom-lens.html
Koburi built Vivitar 120-600mm 5.6 racked out to 350mm
Pentacon 5.6/500 can usually be found on German ebay site...the Pentacons are fairly sharp with decent contrast...but they are a monster of a lens.
Novoflex made some sharp super telephoto lens from 400mm to 680mm...tried a few of these,they are indeed sharp
Century PrecisionOptics also made a 500/3.8 & a 5.6 version,a 600/4.5,a 800/4.7,a 1000/8 and a 1200/6.8...tired a few of these,they do surprisingly well. http://web.archive.org/web/20061118181648/medfmt.8k.com/third/cult.html
The Nikkor 500mm f4 P IF-ED AI-P & the Nikkor 600mm f4 IF-ED New AI-S are both sharp wide open and do well on digital bodies.
There are also few 400mm Nikkors that have excellent performance on digital bodies.
The Nikkor 400mm f2.8 IF-ED AI-S and the 400mm f5.6 ED or P.C. versions.
Third party lens builder Koburi built a very solid 120-600mm f5.6 that does fairly decent...these were usually sold by Vivitar and Soligor gmbH (Germany)...the Vivitar 120-600mm f5.6 version can usually be found on ebay cheap.These are fairly sharp at the long end. http://www.pentaxforums.com/userreviews/vivitar-120-600mm-f-5-6-8-zoom-lens.html
Koburi built Vivitar 120-600mm 5.6 racked out to 350mm
Pentacon 5.6/500 can usually be found on German ebay site...the Pentacons are fairly sharp with decent contrast...but they are a monster of a lens.
Novoflex made some sharp super telephoto lens from 400mm to 680mm...tried a few of these,they are indeed sharp
Century PrecisionOptics also made a 500/3.8 & a 5.6 version,a 600/4.5,a 800/4.7,a 1000/8 and a 1200/6.8...tired a few of these,they do surprisingly well. http://web.archive.org/web/20061118181648/medfmt.8k.com/third/cult.html
The Nikkor 500mm f4 P IF-ED AI-P & the Nikkor 600mm f4 IF-ED New AI-S are both sharp wide open and do well on digital bodies.
There are also few 400mm Nikkors that have excellent performance on digital bodies.
The Nikkor 400mm f2.8 IF-ED AI-S and the 400mm f5.6 ED or P.C. versions.
Third party lens builder Koburi built a very solid 120-600mm f5.6 that does fairly decent...these were usually sold by Vivitar and Soligor gmbH (Germany)...the Vivitar 120-600mm f5.6 version can usually be found on ebay cheap.These are fairly sharp at the long end. http://www.pentaxforums.com/userreviews/vivitar-120-600mm-f-5-6-8-zoom-lens.html
Koburi built Vivitar 120-600mm 5.6 racked out to 350mm
Pentacon 5.6/500 can usually be found on German ebay site...the Pentacons are fairly sharp with decent contrast...but they are a monster of a lens.
