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Player One AHP-HO-2 Anti-Halo PRO 2" Ha+OIII Filter Dual Band Filter for Advanced Deep Sky Imaging
Description:
In recent years, not only the single narrowband filters are chasing narrower band width, but also the dual band filters. From 7nm to 3nm, manufacturing process has been improved so fast!
But one thing is missing. That is halo control! The halo around stars is like a nightmare when you are taking photos of some famous deep sky objects.
Why only chasing super narrow bandwidth, but not deal with the halos? The reason is that halo control is the hardest part in manufacturing. Most people get used of it! Until now!
Specifications:
- Item name: Anti-Halo PRO Dual-Band 2" Ha+OIII Filter
- Frame thickness: body 5mm+ thread 2.5mm, a total of 7.5mm
- Filter glass thickness: 1.85mm
- Ha CWL: 656.3nm and band width: 3.7±0.5nm
- OIII CWL: 500.7nm and band width: 3.2±0.5nm
- Transmittance: >85%
- Blocking depth: OD5 (200-1100nm)
Package Included:
- 1 x Filter
- 1 x Plastic case
Packaging Details:
- G.W.: 0.35kg
Vega Testing of Halo Control:
Luke use his 8" F4 Newtonian and 700D for Canon to test the Anti-Halo Pro dual-band filter. The target is Vega (Zero magnitude star) and exposure 120sec. We can see there is no halo around Vega, and the off axis big halo is the reflection of the lens in coma corrector.
Users Work:
NGC7822, Luke Newbould, Esprit120APO + Anti-Halo Pro Ha+OIII filter + Poseidon-C Pro
NGC7000, Luke Newbould, Redcat 51APO + Anti-Halo Pro Ha+OIII filter + 700D for Canon
