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194493 OPTOLONG H-ALPHA 7NM CLIP-ON FILTER FOR CANON EOS APS-C CHIP

$289.95
SKU:
194493
Weight:
0.5000 LBS
Shipping:
Calculated at checkout
Quantity:

Product Description

Size

  • 1.25"
  • 2"
  • 31mm(unmounted)
  • 36mm(unmounted)
  • EOS-C (clip mount)
  • Customized size's available, please inquire by email 

 

Specifications

  • CWL(centre wavelength): 656.3nm
  • Fwhm: 7nm
  • Tpeak: <85%
  • Coating Wavelength: 300-1100nm
  • Optical Denisity: OD3
  • Surface Quality: 60/40
  • Transmitted Wavefront RMS: λ/4
  • Parallelism (arcsec): 30s 

 

Reference Spectrum

 

 

 

 

 

Manufactruring Technique

  • Optically polished on both sides to ensure accurate λ/4 wavefront and <30 seconds parallalism over both surfaces
  • Ultrasonic wave cleaning substrate with purified water—— cleanup by purified water to remove inpurities and dust effectively

  • Iro source assisted coating for durability and resistance to scratching, as well as stability on CWL (central wavelength) assuring no deviation created by temperature change.

  • Consistently stringent quality testing processes—— each filter is tested by spectrophotometer and laser interferometer, testing spectrum and wavefront to ensure filters quality 

  • Optolong spares no effort to assure quality products and service!

  

 

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