Ah ha! As I was reading the July 2000 Sky and Telescope article Double-Star Measurement Made Easy by Thomas Teague. He said you need to use a Barlow. Confirms what I felt at the CAO a couple of weekends back. You need to get the binary stars much further apart to effectively use the scales in the etched reticule. He explains it differently: you need to increase the focal length of the telescope. He recommends getting it over 3 metres.
Wednesday, June 17, 2009
use Barlow with Micro Guide
Ah ha! As I was reading the July 2000 Sky and Telescope article Double-Star Measurement Made Easy by Thomas Teague. He said you need to use a Barlow. Confirms what I felt at the CAO a couple of weekends back. You need to get the binary stars much further apart to effectively use the scales in the etched reticule. He explains it differently: you need to increase the focal length of the telescope. He recommends getting it over 3 metres.
Subscribe to:
Post Comments (Atom)
No comments:
Post a Comment