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Old 20-05-2016, 11:21 PM
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Atmos (Colin)
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Is this tilt?

I have a feeling that this may be tilt but I just wanted a second (third and fourth!) opinion. It runs from the north east to south west but doesn't effect the north west nor south east.
If it hit everything equally I'd say field curvature but it doesn't.

Thoughts?
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  #2  
Old 21-05-2016, 06:30 AM
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Shiraz (Ray)
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looks like tilt to me. Does the QHY22 have the adjusting ring?
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Old 21-05-2016, 06:43 AM
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Slawomir (Suavi)
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IMO it is a combination of a tilt and some field curvature. Are you using a flattener Colin? I found that my ED f/7 doublet needs a flattener even with small Sony sensor.
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Old 21-05-2016, 06:46 AM
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Atmos (Colin)
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Thanks Ray. The camera doesn't but the focuser does, something I haven't touched yet! Sounds like a good full moon exercise to play with
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Old 21-05-2016, 06:47 AM
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Atmos (Colin)
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Quote:
Originally Posted by Slawomir View Post
IMO it is a combination of a tilt and some field curvature. Are you using a flattener Colin? I found that my ED f/7 doublet needs a flattener even with small Sony sensor.
It has an inbuilt flattener Suavi
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Old 21-05-2016, 08:16 AM
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Slawomir (Suavi)
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Then it must be tilt
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