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About betelgeuse91

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  1. Hmm.... I see. TS one does indeed emphasize about its lanthanum glass. Maybe it could be a TS-exclusive thing. I will keep looking into those. Thanks a lot everyone!
  2. I see. There is some price difference, so if that's the case, I will consider going with TS one. Thank you for your comment John!
  3. Hi, I am wondering what are the differences between those two doublet telescopes: https://www.teleskop-express.de/shop/product_info.php/language/en/info/p9868_TS-Optics-PhotoLine-102mm-f-7-FPL-53-Doublet-Apo-with-2-5--Focuser.html https://www.altairastro.com/starwave-102ed-r-fpl53-refractor-459-p.asp Thanks so much
  4. This is absolutely beautiful. Can't believe this stunning image was taken with only 2 hr exposure with a OSC! I am planning to take this bicolor with a DSLR and this really inspires me. Thank you for sharing.
  5. This is one of the most beautiful NGC7000 I have seen! Thanks for the inspiration, I am convinced to try your method for HaRGB.
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