svbony filter with package

Svbony CLS

Formats

  • 1.25″ Mounted
  • 2″ Mounted (48mm thread)
  • Canon EOS APS-C Clip-in

Spectral Transmission

Yellow line is published transmission. Color fill is my independent verification with the filter I tested. Note: I used a Quartz Tungsten-Halogen bulb which is broad spectrum, but does not have good throughput in the blues hence I only vouch for the accuracy of my independent verification from 500-900nm.

Physical Characteristics of 2″ filter

  • Filter mount thickness: above threads: 4.94mm; including threads: 6.72mm
  • 48mm threads
  • Minimal knurling only on top
  • Highly reflective interference filter
  • Inner retaining ring does have notches for easy filter disassembly with a spanner

Real world tests

Bortle 4, Canon 5D mk iii (stock), AT60ED at f/6, ISO1600, 15 min integration (6*150s)
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Bortle 4, QHY168C, Cooled to -10C, AT60ED at f/6, Unity gain, 18 min integration (6*180s)
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Bortle 9, Canon 5D mk iii (stock), AT60ED at f/6, ISO1600, 10.5 min integration (7*90s)
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Bortle 9, QHY168C, Cooled to -10C, AT60ED at f/6, Unity gain, 15 min integration (5*180s)
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Reader Rating5 Votes
87
Pros
Low cost
Easy to disassemble for DIY mods
Cons
Poor star color with DSLR
Limited formats
CLS concept outdated with move to LED streetlights
82
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