SECOND GO WITH SA200

[p1taylor]

Hi All.     Just got a small hole in clouds and got 20 x 6 seconds,  200 SA is mounted on a sx h9c at 47mm, scope is Meade RCX 10".   

 

peter

[robin_astro]

Hi Peter,

I think you need to work on your focusing to bring out the Balmer lines more clearly. Compare with this spectrum using the SA200 recently posted on cloudy nights for example

http://www.cloudynights.com/topic/569031-all-the-baby-stepsin-a-sprint/

If you have a focal reducer, use it with your 10 " SCT to reduce the size of the star image. Focus on  the zero order first then move the focuser in slightly until the H beta line is sharpest (The zero order will then be out of focus)

Cheers

Robin

[p1taylor]

Hi Robin     As you suggest I will try to get focus beater.

peter