|
Subscribe
RSS
Recent Posts
Revisiting the Triangulum Galaxy
Deep Sky Astrophotography with your Camera and Lens Part 2
Deep Sky Astrophotography with your Camera and Lens Part 1
A Golden Horeshoe Collaboration: M31 Andromeda Galaxy
IC 1805: Gnarly Creatures In Space
The Power of Image Stacking
Comet Processing for Non Trailing Stars and Comet
Focal Reducer test: Celestron SCT f6.3 and 80mm refractor (2008 article)
Adventures in Astrophotography: How I got started (2008 article)
Welcome to Weather and Sky Photography's Blog
Archive
January
February
March
April
May
June
July
August
September
October
November
December
|
Focal Reducer test: Celestron SCT f6.3 and 80mm refractor (2008 article)&layout=none&ref=https://www.weatherandsky.com/blog/2013/5/focal-reducer-test)
Focal Reducer Test (2008)
Using the Celestron SCT f6.3 focal reducer on the Sky-Watcher Equinox 80mm refractor
80mm no reducer = 500mm lens @f6.3
80mm with the reducer = 333mm lens @f4
Connection: Unscrewed Orion 2in prime focus adaptor and put the Celestron f6.3 reducer in between.
Flat field (increased contrast)
 FlatsComparison
Field of view comparisons
 FOVComparison
Toronto Skyline 33 miles away (poor and variable viewing conditions)
80mm with no focal reducer ISO 250 @ 10 seconds
(click for larger image)
 TO_Skyline_80mm
Toronto Skyline 33 miles away (poor and variable viewing conditions)
80mm with Celestron SCT f6.3 focal reducer ISO 250 @ 5 seconds
(click for larger image)
 TO_Skyline_80mm_f63
80mm no focal reducer (exceptional conditions back in July 2007)
(click for larger image)
 33 Miles Away
Keywords:
Astrophotography,
review
|
© Kerry-Ann Lecky Hepburn