Antlia Red+ Dark Filter - 2"
Antlia 2" Red+ Filter - 2"
Considering the high quantum efficiency (QE) of cameras in the near-infrared bands, Antlia has designed a Red+ 700-1000nm filter to capture valuable signals that can not be detected by regular LRGB filters alone. In post-processing, combine the R channel from your LRGB set and with the R+ channel to create a new R channel. The remaining steps for processing are identical to those used with regular LRGB filters.
Antlia Red+ Filter Highlights
- Enhances the sensitivity of imaging to both UV and IR light
- HWB Infrared transparent dark optical glass transmits 700nm to 1000nm
- More infrared signal to be found by combining Red+ filter with your LRGB filter set
- Out of band blocking specification is designed to OD4.5 (0.005%) to block interference from other wavelengths and minimize halos around bright stars
- Identical filter thickness to existing standards and double-sided fine polishing , with utmost care for parfocality
- All Antlia filters are coated to the edge of the substrate and unmounted sizes are edge blackened to eliminate internal reflections from stray light
- 2" mounted in ultra thin M48*0.75 filter cell
Technical Specifications:
- Transmission Range - Red+: 700nm - 1000nm
- Peak Transmission: 95%
- Filter Thickness: 2mm+/-0.05mm
- Substrate: HWB
- Blocking: +/-OD 4.5 (0.005%)
- Filter Size: 2" Mounted
Please note that transmission chart in Images shows the Red+ transmission range on the far right. The rest of the transmission ranges shown are for the Dark Series LRGB filters, which are not included with this purchase. Thanks.