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Optolong Venus U filter 1,25

Prijs: 123,00 EUR

 

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Product Details

Optolong Venus U filter1,25

Venus-U filter makes it possible to obtain photographs, CCD or video images in the UV-A (320-400nm) and observe Venus' cloud structures.

Main Use and Performance

  • Use with monochrome CCD cameras and you need to remove the cover glass of sensor and internal UV-IR blocker in order to pass UV light. The same holds true for mono DSLRs that its built-in low pass filter needs to be removed. What's more, you need a special UV lens together with camera body. The sensor of CCD or CMOS cameras is capable of detecting light in the 350-1100nm range.
  • Act as an outstanding dust shield, which prevents the possibility of dust settling on the lens during long time exposure.
  • Ultraviolet photography finds practical use in medicine, dermatology, botany, criminology and theatrical applications.
Product Specificaties

Technical Data

  • Schott substrate material
  • Thickness 2.0mm
  • Surface Quality: 60/40 (Refer to MIL-O-13830)
  • Fine-optically polished to ensure accurate 1/4 wavefront and <30 seconds parallelism over the both surfaces
  • 80% maximum transmission at spectral region 320-370nm
  • Precision off-band blocking on ultraviolet wavelength 200-280nm, visible and infrared spectral region

Coating Parameter

  • Multi-layers anti-reflection coating
  • Non-cementing optical substrate coating
  • Electron-beam gun evaporation with Ion-assisted deposition coating technology for durability and resistance to scratching, as well as stability on CWL(central wavelength) no deviation affected by temperature change
  • Planetary rotation system offers precision and homogeneity of coatings ensuring high value on transmission of pass-band and Optical density of off-band

Filter Cell

  • Ultra-thin filter cell minimize vignetting by maximize possible clear aperture (clear aperture is 26mm for 1.25"; 45mm for 2")
  • Aerometal Material | Precise CNC Machining | Sand Blasting Process | Black Anodized Finish | Extinction Treatment to Prevent Reflection | Laser Engraving No Fading

Package

  • Plastic PP Case | Imported High Pressure EVA Case Lining | Silver Cardboard Box | High Density Sponge Carton Lining

Size

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