I have been asked about a good focal reducer to use with the 6SE SCT, with the ASI224MC camera.
I was trying to think of reasonably priced reducers available in Aus, but hit a brick wall. - The x0.5 (1.25") that came with the original revolution imager I always found really good on my SCT with the 224MC. But what brand is it ? Its not the same as the one from Bintel as I've got one of those - it looks different and produces a lot of coma (I suppose because it needs a smaller camera-reducer distance ??) - On CN they talk about the antares 0.5, but that's expensive to ship to Aus. - There's the Celestron F6.3, its on special at bintel, but its still $199.
As for Focal Reducers, I have several. The ones that seems to work best for me are the ones I made myself.
I have the Revolution 0.5x, Mallincm MFR5 combo kit, and even a bloody expensive 2.7 inch AstroPhysics 0.7x, but the two I made myself out-perform them all in all the scopes I use. I don't have any scientific reason why. They just work well. I have used the MFR5 in all combinations, with and without the spacers, on their own separately, etc. and yet the cheap little Revolution 0.5x gives a nicer result.
It's hard to tell with FR's because there's so many things to take into consideration: Scope focal length, camera sensor size, object being observed, blah blah blah
__________________________________________ Ken James - Snake Valley Australia CAMERAS: Samsung SCB-4000, Mallincam Xtreme & Xterminator, 3 different Revolution Imagers, 2 ToUcams, SX-5c, Canon 350d, 2 different IMX224's (an RI & RT) and an RT178. Broadcaster on NSN as 'Snake Valley Australia' HERE --> www.nightskiesnetwork.com/ - Video Astronomy Website: ballaratman.wix.com/videoastronomy