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  • Optolong LRGB Filter Testing and Comparison with Baader LRGB Filters . . .
    Their products include Astronomical Filters, Band pass Filters, Fluorescence Filters, Edge filters, Long pass Short pass Filters, Beam spliters, Anti-reflective Coating and Optical Mirrors They are Quality assurance certified ISO9001 Optolong literature states: LRGB Filters Optolong German Shott glass 2mm thick enabling parfocal performance
  • Optolong filter test results - Cloudy Nights
    Page 1 of 2 - Optolong filter test results - posted in Electronically Assisted Astronomy (No Post-Processing): Im not sure if you all are familiar with Optolong brand filters They are a Chinese company called Yulong Optics Co Ltd that has just recently started selling their products in North America I was contacted out of the blue last summer by Yulong with the request that I test some of
  • SHO - Antlia or new Optolong? 3nm for OIII? - Cloudy Nights
    Id like to use 3nm filters and Im heading towards ASI 2600MM, which requires 36mm filters I was considering Antlia but it looks like the Ha of the 3nm set is not available right now Theres a new SHO 3nm set from Optolong https: agenaastro c -unmounted html Id like to ask if anyone has tried these new 3nm Optolong SHO filters (ra
  • Optolong L-eXtreme filter comparison - Cloudy Nights
    Page 1 of 4 - Optolong L-eXtreme filter comparison - posted in Electronically Assisted Astronomy (No Post-Processing): Hi Group, Optolong released a new filter this past June called the L-eXtreme It is a dual narrowband filter, passing the O-III and Halpha emission lines from nebulae I purchased a sample to test against a range of other light pollution filters sold by Optolong The results
  • Narrowband Filters: Astronomik vs Optolong - Cloudy Nights
    Page 1 of 2 - Narrowband Filters: Astronomik vs Optolong - posted in Beginning Deep Sky Imaging: Although it seems like both are fairly good, and of course neither is Astrodon, I was wondering what everyone thought of these two brands and how they would compare Ive tried doing some research on my own, however it gets a little muddy because it seems like a year or two ago Optolong underwent
  • First light: test the new 3nm Optolong SHO filters
    First light: test the new 3nm Optolong SHO filters - posted in Experienced Deep Sky Imaging: Hi folks, I just received my 3nm Optolong SHO filters These filters were just released, I guess many of you are curious about the performance I took the gamble I hope this post helps you decide if you want to get them I shot both Orion Nebula and Horse Head Nebula Alnitak is a very bright star, I
  • Which Optolong filter to start with? - Cloudy Nights
    With respect to some filters having halos, that can be true but I believe Optolong has continued to improve their filters and may have fixed defects that were present 1-2 years ago Neither of my filters have any halos Edited by smiller, 20 December 2023 - 04:25 PM
  • Testing Optolong and Baader Narrow Band Ha SII Filter
    Page 1 of 10 - Testing Optolong and Baader Narrow Band Ha SII Filter - posted in Experienced Deep Sky Imaging: Hi, Two of my friends have recently bought a set of Optolong narrowband filters: Ha (7nm), SII (6 5nm), and OIII (6 5nm) When one of them tested by taking pictures around his house using a modified DSLR (IR-cut filter removed) mounted with either Ha or SII filter, he noticed that
  • Optolong UHC filters - Light Pollution - Cloudy Nights
    In my observing notes from viewing the Helix nebula this past October with my 12" Dob, I compared the two filters ES 18mm 82º, 83x w Optolong UHC ES 20mm 68º, 75x w DGM NPB 18mm and Optolong UHC displayed good contrast 20mm and DGM NPB showed better overal contrast and inner detail The Optolong UHC is a definite improvement over
  • Dualband Filter Shootout! Optolong L-eXtreme vs Askar Colour Magic 6nm . . .
    The Optolong L-eXtreme was the worst, and the Optolong L-Ultimate actually has spikes coming from the star The Askar Colour Magic 6nm’s halos were large but clean Perhaps this was too brutal a challenge, and no astrophotographer would actually image Vega in this way, but I wanted to really stress-test these filters so that potential buyers





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