Celestron MPCC test

[MikeD]

I managed to get hold of a Celestron coma corrector second hand.

So last night I went around my friends house ( he has a lathe in is garrage) and set about working out a way to get the MPCC 55mm from the CCD chip on my camera and reach focus on my 10" f 4.8 Newt.

With a mish mash of bits from old SLR lenses and after cutting a shed load off the Skywatcher 2" focus adaptor we got it to 55mm.

So back home and it was clear so I decided to give it a go..........Bu**er it was short of inwards focus with just a touch needed I guess about 0.25mm short.

So a quick adjustment I was able to put it together 52.5mm from the CDD this left me with 2mm of inwards focus travel left after reaching focus.

Below is the test shot and a crop of the top right corner of the test shot from last night and an image from before.

with the bodge I did to get it set @ 52.5mm the ccd is not quite square to the mpcc but it's still a great improvement.

I now have to decide weather to move the primary up the tube or cut a touch more off the 2" adaptor to reach focus @ 55mm

Mike.

[MikeD]

And a shot of the MPCC/filer wheel and CCD attaching to the modded 2" focus adaptor,

Note the bodged spacer made from Plexiglas to help get me to 52.5mm for the test

Mike.

[anthony]

Good stuff Mike.

Take another bit off the adapter. Move onto shifting the mirror if that does not do it!

Once you have sorted the coma it would be wholly approriate to restart the heart nebula epic!

Anthony

[steppenwolf]

Interesting report and it confirms my opinion that I am heading in the right direction by making an adapter for my 250 SPX to allow me to use one of these MPCC adapters and SXVF-M25C and still get focus.

[Psychobilly]

Ah so thats what your upto

Billy...

[steppenwolf]

Ah so thats what your upto

Billy...

The project is well on the way now, Billy.