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I bought this filter about one year ago with the aim to protect both my Tak-100 DF and a Quark eyepiece which eventually I never bought. Therefore, I am selling it, hoping that it will go to a good home and be used as it deserves.
It is a top quality Baader ERF for solar viewing with Quarks. It is in excellent condition and comes complete with housing measuring 146mm. The previous owner used to fit it on an Altair 115mm F7 refractor. With some minor modification (essentially adding some padding to the internal side of the housing) it can be fitted on many other telescopes.
It cost £550 but selling for £320 including postage. I will accept PayPal (pay as a friend) or direct bank transfer.
Also advertised on ABS.
Thank you for looking,
I have a question about filterwheels; SBIG filter wheels specifically. As far as I know they are the only ones that really use the 8 position filter wheels. So I have it loaded with L, R, G, B, Ha, OIII, and SII. So that is seven filters, what goes in the 8th slot???
Thank you for your insight,
as suggested by Hughsie, here's my pastel sketch my contribution to the solar imaging challenge.
Telescope: Lunt LS50THaB600PT
Eyepiece: Celestron X-Cel 10mm
Date & Time: May 29th, 2019 / 1630-1700 CEST
Location: home terrace, Dusseldorf region, Germany
Technique: reddish Koh-i-Noor Toison d'Or pastels and pastel pens on greyish Canson Mi-Teintes pastel paper
Like all of my astronomical sketches , I did this one directly at the eyepiece. The picture of the sketch is taken with my smartphone and just cropped.
Clear (and sunny) skies!
Size: 24 x 32 cm
Not many chances of Solar Imaging this year so far but caught this one.
AR2741 from the 12th late afternoon
152mm Technosky Refractor @ f5.9
135mm Baader D-ERF
Daystar Quark Chromosphere + Eliminator
5862 Frames, 4Ms 30 second capture @ 195Fps 1024 x 768 Mono16
Best 45% Frames stacked in AS!3, ImPPG then tweaked in PS