Precise details:
Introduction:
UV/IR Cut filters are IR and UV cut-off filters for astronomical photography, which can effectively prevent interference from IR and UV rays and provide focus and dust protection. UV-IR filters are used in all digital cameras, CCD cameras and webcams for photo processing technology. High transmittance visual band (420 nm ~ 680 nm), including H-Alpha (656 nm), S-II (672 nm) and NII lights. They are used to concentrate light and protect against dust.
Specifications:
Brand | OPTOLONG |
Size | 2" |
Metal Frame Material | Aviation Aluminum |
Thread | M48*0.75 |
Peak transmittance | Tmax>95% @ 420nm-680nm |
Blocking Area | >OD3(0.1%) @ 300-1100nm |
Filter glass thickness | 1.85mm to ensure high flatness of 1/4λ during optical processing. |
Glass material | B270 |
Surface finish | 60/40 |
ROHS | Pass |
The main uses and real shot effect diagram (uses):
1, suitable for use with DSLR and CCD, can effectively inhibit the interference of UV and IR
2, for astronomy photography inside with monochrome CCD use
3ã€For DSLR conversion for astrophotography
Manufacture:
- Optical high precision double-sided polishing to ensure parallelism greater than 30" and high flatness 1/4λ to avoid halos.
- Precision double-sided optical coating, not a two-piece bonding type, effectively increases transmittance and cut-off depth.
- Electron Evaporation Technology
- Ion Source Assisted Coating (IAD) technology, which increases the density of the film layer and ensures that the temperature drift of the filter wavelength due to temperature is minimized.
-High uniformity planetary wheel coating fixture to improve filter wavelength uniformity.
Metal frame:
Thread: M48*0.75
High quality aircraft aluminum
Precision CNC one-piece molding
Optical instruments professional fine sandblasting and anodic treatment, matte finish inside the frame to prevent reflections.
Font laser engraving - no fading, color fading
Packaging:
Plastic box material: PP material
Plastic box lining: high pressure white EVA material
Paper box: 340g silver cardboard
Carton liner: high density foam
Optical curves:
This filter cuts off the visible part of the 400-700nm band and ensures high transmission of the nebula emission line. The transmittance is up to 95%, while effectively cutting out interference in the UV and IR bands.
Package included:
1 * OPTOLONG UV/IR Cut Blocker Astronomical Telescope Filter