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Full Disc

PostPosted: Wed Feb 01, 2012 11:15 pm
by gizmo
Hi

I'm using the Philip SPC900NC 1/4" Type which has 659 pixels horizontal x 494 pixels vertical.

Sensor Type CCD Color (Sony ICX098BQ)
Sensor Size / Pixel Size 1/4" (5.6 x 5.6 um)
Min. Illumination 0.9 lux
Max. Resolution 640 x 480 px.

and a LS 8" Meade telescope, my question is about focal reducers, how do I get a full pic of the sun or the moon with this equipment, which focal reducer would suffice?

Thanks for any advice..

Re: Full Disc

PostPosted: Thu Feb 02, 2012 9:20 am
by smerral
Nice shot of the spot Gizmo. :) With that combination you really need to be looking at a mosaic to do a full disc. An Antares 0.5x focal reducer will help, but white light solar can be difficult when it comes to mosaics. probably the best program to use is Imerge. Also it's worth downoading CCDCalc (together with the extra reference images) as this shows you what FOV you get with each scope-camera combo. Hope this helps! :)

Re: Full Disc

PostPosted: Fri Feb 03, 2012 4:56 pm
by gizmo
Thanks for the advice I will get a 0.5 reducer watch this space :)

Re: Full Disc

PostPosted: Fri Feb 03, 2012 6:20 pm
by Bizibilder
A quick look at the price of reducers makes me think that you may be better off buying a refractor specifically for solar imaging?

Re: Full Disc

PostPosted: Sat Feb 04, 2012 8:04 pm
by Richard
For about £90 you can get a ST80...which has a tmount thread built in, so a DSLR with a tmount screw direct onto it, full disc easy then, and quality is very good for the price, some of my moon shots are with the ST80.... :applause:

Re: Full Disc

PostPosted: Mon Feb 06, 2012 9:16 pm
by gizmo
0.5 reducer only cost £14 so I will give it a try. But hanks for the advice I'am also trying to usethe web cam as I don't have a DSLR.