Quote:
Originally Posted by Merlin66
JA,
Dunk,
Yes, the Astronomik UV-IR looked promising. I sent a message asking the transmission at 390nm but so far have received no reply.
Revisiting: The L1 version seems to cover the 390nm region. Which version did you order?
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Ken, I was referring to just this one…arrived today (7 calendar days after ordering, from a certain vendor in Exeter
)
https://www.astronomik.com/en/uv-und...ck-filter.html
At 390nm the plot suggests 90% transmission. I bought this to experiment with a #47 for Venus… might be a little too interesting on a multi-coated SCT, but was reasonably priced.