Images captured via Prime Focus technique
Oct 29, 2012 16:30:32 #
mark.r
Loc: Port Talbot South Wales
Hi' These pictures were done at prime focus.Mark
Planet Jupiter (?)
Pleiades constellation
Oct 29, 2012 17:11:51 #
mark.r wrote:
Hi' These pictures were done at prime focus.Mark
Thank you Mark for sharing these, they're great photos, especially the Pleiades. What camera scope combination were you using?
Oct 29, 2012 17:21:07 #
mark.r
Loc: Port Talbot South Wales
Thanks for your kind reply. The camera is a Canon 300D, and the telescope is an 8-inch f/5 reflector type. The mount is a tracker, so it can follow a coordinate across the sky.
Oct 29, 2012 19:16:58 #
What is 'prime focus'?
What tracker was used for telescope?
What brand 8-inch, f/5 reflector telescope?
How was Canon 300D mounted to telescope?
What nebula in image #3?
What tracker was used for telescope?
What brand 8-inch, f/5 reflector telescope?
How was Canon 300D mounted to telescope?
What nebula in image #3?
Oct 29, 2012 22:08:58 #
Even just checking out this post was bad (good) enough but you guy really have the WOW factor.
Excellant pictures, beyond my comprehension.
Baz
Excellant pictures, beyond my comprehension.
Baz
Oct 30, 2012 07:24:58 #
Nikonian72 wrote:
I believe that is the Orion nebula.What nebula in image #3?
Oct 30, 2012 21:00:14 #
The point of "Prime Focus" is located at the top end of the telescope. Light from a celestial object enters the telescope through the top, and bounces off the primary mirror at the bottom then back up to the prime focus (see diagram below). Originally, astronomers observed directly through an eyepiece at prime focus. http://www.ucolick.org/public/telescopes/shane.html#3foci
Second image: http://en.wikipedia.org/wiki/Reflecting_telescope#Prime_focus
Second image: http://en.wikipedia.org/wiki/Reflecting_telescope#Prime_focus
A prime focus telescope design. The observer/camera is at the focal point (shown as a red X).
Nov 17, 2012 14:27:19 #
great images Mark! I have an Orion 10" reflector with Atlas EQ-G mount , been trying to use my canon 5d mk III with it and seem to have a great deal of trouble with focus,,, by prime focus do you mean camera adapter on focuser without eyepiece ? how long was your exposure of orion nebula? Stunning!!
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