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Raymo
Couldn’t agree more about focal length and galaxy imaging, especially the dim ones
In regards to galaxies I like to push my 6” to the limits with good collimation, tight focus , clean optics , hours and hours of 5 minute subs , dithering, darks , stacking and good processing using Startools.
Carlton
Attached image of NGC 6744 Pavo galaxy a 9.2 magnitude object ( not exactly a bright object ) taken with my 6”
Cheers
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