ngc253+M8 with LX200+EOS300D

[FOOTPRINT]

Hi All,
Still cloudy weather, so herewith some pics. taken a few months ago using the Canon EOS300D on the LX200 10" at F-6.3 (guided with the ED80+MX7C) ngc 253 Exp. 12 Min.-DF removed, M8-6 Min. Exp. DF removed, the big cmos chip in the Canon helps, but still not a very wide FOV with the LX200.

cheers....Jim

[h0ughy]

they are fantastic shots. M8 is fabulous

[rumples riot]

Good stuff, nice to see some LX200 work here.

[RB]

Top Shots there Jim.

I wonder could you use the Meade 3.3 reducer with the Canon or is it only suitable with the main line CCDs not DSLR's?

Cheers

[Striker]

I think the DSLR chip is way to big for a Meade 3.3FR.

From my understanding the 3.3 can only be used with small CCD chips.

I could be wrong though.

[Itchy]

You are absolutely right Striker. I've seen an attempt at using it. The very centre of the frame is OK, but everything is wacko!:P

Cheers

[RB]

Thanks Tony and Itchy regarding the Meade FR 3.3

:drink:

Cheers

[atalas]

Nice work Jim !

[Brad Moore]

Hay Jim,

Nice work with the 300D. Good job on the guiding! The stars look nice and round.


Andrew,

The 3.3 FR will cover a 1.5 to 2MP CCD. Then vignetting will become more of a problem. You'll need to take good flats to get rid of it.

Another important aspect is to maintain the correct back focus distance from the CCD/CMOS to the FR3.3. It should be 53mm from the optical centre of the FR3.3 otherwise it will introduce serious aberrations into your image. (Also the back focus distance of the Meade FR 6.3 is 87mm). This usually means you'll have to get custom spacers made.

Also your focus zone will be a lot harder to achieve as it’s now the 1/10 of the size of F10. E.g. 0.22mm for F10, 0.08mm for F6.3 and 0.02mm for F3.3.

Hope this helps,
Brad Moore