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Daniel Mounsey
Vendor - Woodland Hils
Reged: 06/12/02
Posts: 3200
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Re: FET-300/EM-3700
08/12/08 11:21 AM
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Tamiji,
I'm guessing about a million dollar spread there. It's interesting you mention this scope. A customer just took delivery on one of these in Korea according to sources. I would expect this to be the finest refractor in the world period and at the limit of how big these kinds of scopes can be, due to spherical issues. About the closest I've gotten to this is with the 10" F-16 Ziess which houses a doublet up front and a 4" color corrector made by Roland Christen at the rear for a total of three elements. Saturn on a good night looks like a 50 cent piece but the 300 Tak here is in a completely different catigory using the latest technology like glass, coatings, design etc.
A scope as big as the 300 you presented here needs an observatory with a properly designed air conditioning system to keep the spherical correction in place, otherwise it will remain in a highly under corrected state. Just to put this matter into perspective, my friends 8" triplet TMB at sea level can take about two hours before it reaches perfect spherical correction and up to three hours at certain locations at higher altitudes. Just a tip for you. When you set up your 6" triplet, take the cover off the lens and remove the cap on the rear so the optical tube can settle down faster.
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