|
Not an easy subject. It depends severely on seeing, and a little luck.
I did it easily a couple of nights ago with my MN76, using an 8mm ortho. Once you do it, you can then back off the power a little and continue to split it, but again seeing plays the big part.
I have done it with the 10" f5 newt.
I have done it with my ED80/840 refractor as well. In fact I am looking to try this again, and also the AS63/840 refractor.
I don't really believe scope types are that big an influence, although for some reason the ED80/840 splits well.
One trick is to use an OIII type filter, and this evidently serves to reduce the glare of the primary, but allo some of the secondary to shine through (the primary and secondary are different colours).
I like to try when it is directly overhead.
Lastly remember that the secondary "leads" the primary, so if you watch the star(s) drift across the field, the secondary will lead.
Go for it.
|