> To fill the frame vertically with the moon (1/2 degree) using a 4/3
> sensor (13mm) will require a 1500mm (actual) focal length lens. My
> 2000mm Celestron 8 is unable to do it on full frame (24mm vertical)
> using only prime focus. Air currents, haze and vibration are serious
> problems with any telescope. Fortunately, the moon is bright and usege
> can use a pretty high shutter speed.
Depends on apogee vs. perigee.
All of my moon-subject shots are taken with 300mm on 4/3. This works
out pretty well. There are times when i crop down to an equivalent of
600mm, but most of the time my compositions benefit from having a
little bit of air around it. When you get beyond 600mm on 4/3, it's
almost impossible to track the moon and frame it without a proper
telescope mount. The moon is really scooting along and you've got only
seconds for it to traverse the entire image area.
These moon shots are actually selling. I have no idea who is buying
them for what purposes, but I've gotten a few stock image sales out of
them.
--
Ken Norton
ken@xxxxxxxxxxx
http://www.zone-10.com
--
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