Description
For all astrophotography enthusiasts, filters are one of the indispensable accessories to achieve perfect deep-sky imaging. The dedicated astronomy filters for deep-sky imaging can effectively eliminate the influence from the background light and enhance the contract of your photographs and make the targets displayed more clearly and delicately. Askar’s newly-launched 3nm deep-sky Color Magic narrowband filter is a professional astrophotography tool specifically designed for deep-sky imaging.
Compared with the previous Askar 5nm deep-sky filters, this filter set has a narrower bandwidth. Therefore, even if your are at an area affected by the urban light pollution, night glow and other undesired light, you can capture high-quality deep-sky pictures with the help of Askar 3nm narrowband filters. The narrower bandwidth and efficient light transmission considerably enhance the contrast of your pictures, making it easier to display the details of the stars that otherwise are fairly difficult to spot.
At the same time, the Color Magic 3nm deep-sky narrowband filter has very good halation control, providing more contribution to your astrophotography.
The Askar OIII narrowband filter is very suitable for shooting nebulae and supernova remnants that release OIII particles.
The Askar OIII narrowband filter has a center wavelength of 500.7nm, where it has an ultra-high transmittance over 90%. The highly narrow 3nm bandwidth ensures this filter effectively blocks out light pollution or other distracting lights such as night glow. Even in areas where there is severe light pollution can it ensure the imaging quality. And when shooting at some dark places, Askar OIII can effectively enhance the contrast of images.
What’ s more, the specific design of 3nm OIII filter gives it very good halation control, making the stars sharper and rounder.
Specifications:
- Name: 3nm OIII 2"
- Male filter thread: M48x0.75
- FWHM: 3nm
- CWL：500.7nm
- Peak transmittance：90%
- Barrier property：≥OD5 @ 200-1100nm
- Thickness：1.85 ± 0.05mm
- Surface finish：60/40
- Parallelism：30"