I have the ASI 178MM (for Solar) with my Daystar Ha.
The Mono camera has no IR filter (unless I am mistaken) and I removed the IR cut filter from my NexImage 5 camera understanding that imaging the Sun was better without them.
Therefore why would you add an IR blocking filter (other than to reduce heat) to a diagonal, surely that defeats the puropse of not having a filter in the camera ???, and under 80mm it is not needed anyway in the scope
Thanks
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Celestron 8" Edge HD Evolution, Esprit 120mm triplet, 72mm APO, Sky Tee 2, 6" reflecting scope, William Optics Binoviewer, Quark Daystar Ha Chromosphere on 72mm ED, LVW8mm eyepiece and Celestron 19mm Axiom, matched W.O 10 and 20mm, and a few others, D4s, D810,
For info, I am Autistic, Aspergers, ADHD, therefore if I come over as a little "short" on occasions it is not intended, thank you
I can only guess that the filter is there to protect the diagonal from the full heat energy of the Sun's light? I see it is described as an "energy-rejection filter" in your diagram,
regards,
Brian 52.3N 0.6W
Wellingborough UK. 254mm LX90 on Superwedge, WO ZS66SD, Helios 102mm f5 on EQ1, Hunter 11x80, Pentax 10x50
ASI120MC Toucam Pros 740k/840k/900nc mono, Pentax K110D
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