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Old 21-09-2014, 07:14 PM
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Shiraz (Ray)
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Location: ardrossan south australia
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Quote:
Originally Posted by PRejto View Post

I'm beginning to think that it might be due to the fact that TEC colour correction goes from 436 nm - 1000 nm, but the Baader transmits to ca 380 nm. Together with the ca 40% QE of the Sony chip at 380 nm might this be the reason?

Many thanks,

Peter
that would be my guess. The APO could be spraying out a fair bit of a halo in the violet and still be in spec. Since the FWHM are pretty consistent, it is not likely to be seeing or focus.

The Trius could have more violet sensitivity than the 8300 for a variety of reasons - window material, AR coatings etc. as well as the high QE. Might be worth trying a minus-violet filter or fringe killer in conjunction with LRGB, which is a bit of a pain.
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