Can I collimate with a DSLR?

[Johnboy2011]

Do I have to use an eyepiece or can I use the live view on the DSLR? When it is connected the light path would be C9.25 - FR6.3 - OAG - DSLR. When I try it I can take the star out of focus and collimate zoomed in at x200 but when I go to the other side of focus the collimation will be out. If I adjust this and check again the other way I find that I am just chasing it and can't seem to get both sides of focus collimated. Should I just be using and eyepiece?

John

[Stephen]

Would having the OAG in the way when collimating not interfere with the results? (You aren't seeing all the light.)

[Johnboy2011]

That sounds sensible as the pick up prism would make the star look uneven?

[Psychobilly]

Yes you can... I found the easiest way to collimate an SCT is to use Metaguide..

MetaGuide

I use my DMK 21AU04AS running at 60 fps .. and let metaguide "guide" the mount to keep the star centered during collimation...

Peter...

[Space Bat]

Peter - that looks good, will give that a go see how it works...

I tend not to fiddle with collimation - as happy with setting up..when got the scope..did tweak it the other week.

But would be good to see some technology in play to see if my eyes are pulling in the scope properly