12" Lightbridge focal reduction

[Escortitis]

Hello all,

Quick post to see if anyone is using focal reduction on their lightbridge? I'm using a sc1 toucam on a mogg adapter with a 12" lightbridge, with great results on planets, but would like a larger F.O.V. I understand newtonian/dobs (espeacially fast f/l) aren't the preferred option for DSI but just wondering if anyone has tried. I have been lent a mogg 0.63x reducer, and it's 0.3x extention tube, but have had no joy.

I'm thinking low profile focuser.

Is there a better reducer option for fast dob's?

Thanks agian all,

George

[rmcpb (Rob)]

Infocus seems to be the problem with these on newts but that would not be such a problem on a Lightbridge as you could make a shorter set of trusses easily. Much easier than moving your mirror up the tube in a solid OTA.

Have a look in Bunners for tubing and try some shorter ones but make the changes slowly as you cannot add length easily.

[Escortitis]

Thanks Rob,
Have looked at many options, will try my whole webcam in a 2" tube with the ability to slide all the way through the focuser. The 900spc can be fit into a tube with a 50mm OD very easy, and focal reduction adapted to the webcam as normal. Sounds easy, will let all know how it goes.
George.

[rmcpb (Rob)]

George,

A good discussion on the matter of infocus here.

Cheers