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Well done Barry- the triffid is just a joy
I just noticed that you are using the same gear as I am at the moment and you have far less coma than I am getting - I have a big question over optical alignment on mine with the Orion camera - my 2 inch extension tube has only one screw (GSO extension tube) while the camera nose piece is set up for a compression ring - i suspect the holding screw is sitting just near the edge of the compression ring recess - slightly kicking the camera out of optical alignment.
Are you using a one screw extension tube or a compression ring type tube?
The other alternative is I replaced the focuser with a moonlite motor focus and that may be the problem - at least I can collimate that but I think I will have to invest in CCD Inspector.
Anyway bottom line is that it is a very nice image mate - well done
MB
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