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My guiding graph from PHD

swag72

By swag72
in Imaging - Discussion

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swag72

swag72

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I hope that this has helped someone!!

Regarding the graph though, just a word of caution really. This was obtained using a finderscope, which I think is 9x50 - When I tried this on a much longer FL it was going nowhere fast! It may look good, but I'm not sure how obtainable such a flat graph would be with a longer focal length. When I was struggling with it, I was using it on a 900mm scope!

I'm just working on a very basic, idiots workflow and routine for set up at the moment - I will include the PA checking in PHD - Don't know whether it would be of use to anyone once I've done it.

I have come to appreciate what a massive advantage I have here in Spain, the last 4 nights have been clear, so I have achieved in 4 nights what it could easily take 1-2 months in UK. Also means that I am able to cement the routines pretty quickly too.

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Psychobilly

Psychobilly

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I use a 500mm f8 M42 tele for my guidescope.... its a nice compromise FL as I tend to image between 340mm (Megrez 72 + FFIII) and 2032mm (CPC800 @ f10) FL with the scopes... I have also got an OAG but havent really used it in anger yet....

Leaving aside the coma the other stars look pretty good Sara...

Peter...

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martin_h

martin_h

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Leaving aside the coma the other stars look pretty good Sara...

Peter...

I would go with Peter, look at the image. If the stars look good and round (ignoring the edges) then the guiding is working. I only look at the graph if there is something wrong with the image.:)

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msinclairinork

msinclairinork

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Would I have to use a reducer on all scopes or just the 120ED? I ask as there's really little point in having 900mm if you can't use it!!

Mmm, food for thought for tonight - Longer subs me thinks!!

pritty sure you can get a field flattener that is not a focal reducer. They are usualy much cheaper too.

HTH

Michael

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jgs001

jgs001

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Sara, that's working well... nice graph, and the image, apart from those stars at the edges (I get them all the time with the 80, I don't have a flattener) looks good with sharp stars...

As for a flattener alone... there's Reducers/Flatteners - Skywatcher Field Flattener I don't know if it's suitable at f/7.5... I don't know if anyone has ever used it for that focal ratio.

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