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maybe this is not such a good idea
Hi all, most regrettably I have developed quite an interest in the Golden Era of Visual Astronomy, in particular Sir John Herschel and his time in South Africa.
I am developing my skills and my knowledge so that in time I can do the ultimate Herschel list.
My problem is what scope do I use for this project. He used an 18" metal mirror with 67% reflectivity and a focal length of 20 FEET. Yup it was a long sucker.
How practical would it be to try to build an honest replica?
The support structure is certainly doable but is there a mirror maker that could or would grind an 18" silver coated mirror that has 67% reflectivity?
Maybe I go with store bought and simply accept that the view will be different?
Brian
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