Quote:
Originally Posted by Brian W
To answer the questions and comments, intel is not high on my list but Orion's only 14" truss is an Intel.
Buying is still a way off yet as first I need to build the observatory and finish the H-400 (239 caught as of last night)
I find many people agree that the larger LB's are not so good. I have had no complaints with either construction or optics of my 8' LB but it seems to be the one they borrow parts from for the bigger ones.
Again though let me emphasize what I am looking for is a modern scope that will get me close to what Sir John Herschel was able to see with his 18" metal mirror with a 20 foot f/l.
Brian
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Brian, there is no modern mass produced scope that will go within a bulls roar of comparing with Sir John Herschels 18" creation. No doubt you will be able to purchase a scope of comparable apertures but it will have nothing like the focal ratio. Herschels scope you talk about was approx F13. the performance of it would be nothing like an F 4.5. The FOV would have been nothing like a modern F 4.5 and the images would not have been as bright as a modern scope of similar dia but faster focal ratio.
Cheers
Trevor.