ToupTek PureSight A1 2-inch 5NM F/3.2 Dual Narrowband Filters Ha+OIII Astronomical Filter for Deepsky Photography
Impossible de charger la disponibilité du service de retrait
ToupTek PureSight A1 2-inch 5NM F/3.2 Dual Narrowband Filters Ha+OIII Astronomical Filter for Deepsky Photography
Description:
- Specially designed for color astronomical photography in high light hazardous environments.
- 5nm ultra narrow full width at half maximum (FWHM), accurately passing through the Hα (656.3nm) and OII (500.7nm) core emission lines, penetrating the photodamage barrier.
- Cut off depth of average OD5+, transmittance 0.001%; Effectively blocking 99.999% of non target spectral areas, effectively filtering out urban light pollution interference such as streetlights and neon lights.
- The high-purity fused silica substrate and IAD ion assisted deposition coating process make the film compact and even, leaving the halo ghost behind.
- The anti reflective film layer significantly reduces internal reflection and suppresses halo. The imaging background is pure and the star points are sharp.
- 90%+ high transmittance, ≤30" high parallelism, 60/40 surface finish; balanced light control and transparency, clear presentation of nebula shadows and details. City balconies can also shoot pure deep space image quality.
- Aluminum alloy matte black filter frame, solid and wear-resistant, effectively reduces stray light reflection.
- For deep optimization of fast optical systems with F/3.2 and above, stable performance can still be achieved at F/2.8.
- 2-inch size suitable for full frame and below color cameras. M48x0.75 standard thread easily connects to 2-inch 7-hole or 5-hole filter wheels and 2-inch filter drawers.
Specification:
- Target spectral lines: Ha 656.3nm & OIII 500.7nm
- FWHM (full width at half maximum): 5.0nm±1.2/5.0nm±1
- Peak transmittance: >90%
- Cut off depth: better than average OD5 at 200-1100nm
- Base material type: fused silica
- Thickness: 2.00mm±0.1
- Parallelism: ≤30”
- Surface smoothness: 60/40
- Adaptive optical system: ≥F/3.2
- Coating process: IAD ion assisted deposition technology
- Size: 2 inches (with filter frame, frame height 5mm, thread height 2mm)
- Filter installation thread: M48 x 0.75
- Filter frame material: aluminum alloy
- Effective aperture: 43.9mm
- Installation direction: thread side facing sensor
Package Included:
- 1 x Dual Narrowband Filter
- Businesses may need to employ various types of legal pages on their websites or mobile apps. Some, like Privacy Policies, are required by law, while others, such as a Terms and Conditions agreement (T&C), are not. Regardless of legal demands, you may find that your company needs one or more legal pages for compliance and optimal operation.
- In this article, we will go over the most common legal pages, walk you through a summary of what each requires, and explain why you may need it. In addition, you'll find a sample template for each type of legal page so you can quickly get started writing your own.
If you have any questions about this product, please let us know by filling out the form below, and we will contact you as soon as possible.