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Old 01-07-2021, 10:22 PM
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Peter Ward
Galaxy hitchhiking guide

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Join Date: Dec 2007
Location: The Shire
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Quote:
Originally Posted by Hans Tucker View Post
Any owner of a AP130GTX imaged, without any reducer, at the native f6.3. Does the scope need the Prime Focus Field Flattener or do people opt to go faster and use the QUADTCC?
I have both the FFC and QUAD reducer. The faster f-ratio is moot, it's more a case of wider field.

As for edge correction, in native format at F6.3 neither of will 35mm or APS_C cut it.

In either case stars look like small comets at the edges.

A hairy eyeball won't notice. Royal Greenwich might. The Malin's certainly will.
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