Astrodon 31mm Unmounted LRGB - E Series Gen 2 Imaging Filters

  • Astrodon 31mm Unmounted LRGB - E Series Gen 2 Imaging Filters
A good quality set of filters with nice clean glass!

details from web below:

Astrodon Tru-Balance RGB filters have revolutionized CCD imaging. Their popularity is due to ease-of-use, high optical throughput and great resulting color for galaxies, star clusters and nebulae. There are two varieties of Tru-Balance filters - E-Series and I-Series.

I-Series filters are designed to approximately equalize the flux of Kodak's Interline CCD detectors, including compensation for the solar photon flux. This means that your RGB color combine weights will be approximately 1:1:1 within perhaps 10%. This can never be perfect, but it does allow you to take equal time exposures for your RGB data and also just one corresponding dark exposure time.

Introducing Generation 2 True-Balance filters (LRGB2) in April, 2008 in all sizes. This is the first change in Astrodon filter design and fabrication since their inception. We listened to your requests.

Technical Specs:

•1.25" mounted and 49.7 mm diameter
•~1:1:1 color combine weights for G2V white-point for Kodak Interline detectors
•Equal RGB exposures and one dark time
•Better color separation (spectra)
•Better color rendition of galaxies based upon color theory
•Significant reflection and star halo reduction (see Alnitak image)
•Enhanced contrast for HII regions in galaxies
•Small spectral "gap" to minimize effect of light pollution
•Highest efficiency blue filter with less UV
•Correct "teal" OIII color for planetary nebula
•More parfocal - thickness 3+/-0.025 mm*
•Parfocal with Astrodon's high-performance narrowband filters
•Striae-free 1/4 wave fused silica substrates
•30 arcsec parallelism
•Ultra-hard and durable sputtered coatings
•Proudly made in the U.S.A.



 
Please note:
Only accessories listed in the photograph's are included with the purchase unless otherwise stated.

Photographs are taken by ENS and aren't manufacturer stock images unless otherwise stated.

For any specific enquiries then please use our contact form and quote the product id.

Product Info

  • Brand: Astrodon
  • Product Code: 11618
  • Weight: 1.20 kg
  • Current Stock: 1
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  • £500.00