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I agree with Mike for the optimal image production of high rez imagery.
I shudder to think what Paul Haese and his 18" mirror and larger focal length is going to be able to produce.
At then end of the day, this is continually evolving
-bigger mirrors
-active cooling of mirrors
-faster and bigger resolution cameras
-faster pipes to record the info on computer or hard disk
-automated focus points for filters and automatic filter changing
-self correcting collimation?
like computers,I think you simply have to budger $1500+ every year to keep up with the latest technology with this particuliar part of the hobby
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