I have the ASI 178MM (for Solar)

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skyhawk
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I have the ASI 178MM (for Solar)

Post by skyhawk »

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
Brian
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Re: I have the ASI 178MM (for Solar)

Post by Brian »

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
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Wellingborough UK.

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smerral
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Re: I have the ASI 178MM (for Solar)

Post by smerral »

Yes, it's to filter out the heat energy.
BRIAN
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