Ok, I've tried two different methods of determining the size and placement of baffles for a refractor. Each method puts the baffle in a slighly different location, and of different diameters of course. Both like like they would work.
So what is the best method to determine baffle placement?
And should the rear baffle ever be any smaller than the focuser I.D? - Or should it be the diameter of the lens of my lowest power eyepiece? - and no smaller than that? (68mm Russell with 40mm lens) - Then I would think in a properly baffled refrator that the end of the focuser drawtube should not be visible from the objective end but rather hidden behind the rear baffle - right? :S
It is surprising to see that there is only two baffles needed - I was thinking it would be more.
I'm kinda hoping this will open up a can of worms - I'd like to see what methods you all would suggest. And try them out on paper to see the difference.
I've attached a pic of full scale drawing - don't know if you'll be able to make it out.
Thanks for your help
Tim
So what is the best method to determine baffle placement?
And should the rear baffle ever be any smaller than the focuser I.D? - Or should it be the diameter of the lens of my lowest power eyepiece? - and no smaller than that? (68mm Russell with 40mm lens) - Then I would think in a properly baffled refrator that the end of the focuser drawtube should not be visible from the objective end but rather hidden behind the rear baffle - right? :S
It is surprising to see that there is only two baffles needed - I was thinking it would be more.
I'm kinda hoping this will open up a can of worms - I'd like to see what methods you all would suggest. And try them out on paper to see the difference.
I've attached a pic of full scale drawing - don't know if you'll be able to make it out.
Thanks for your help
Tim
Attached Image:
