Why Purchase from All-Star Telescope?
Free Expert Support
Whether you are a first timer needing help with setting up or an enthusiast that can't quite make that one thing work, our expert staff are ready to support your needs. With decades of knowledge and first hand experience we've been there and we can help you through it!
Stress Free, Secure Transactions
You can trust purchasing and delivery with All-Star Telescope. All of our transactions are 100% secure and Level 1 PCI DSS compliant thanks to Shopify's ShopPay platform. For additional protection, we insure 100% of the value of every shipment we make. If it get's lost during shipment, we replace it. If it gets damaged during shipment, we replace it. We make sure your product arrives exactly as you would expect it to; we promise.
We also ensure privacy protection. We never keep any of your credit card information on file and any of your personal data is stored according to our policies.
30 Day Return Policy
Buy with confidence knowing that we accept returns up to 30 days after purchase. We want you to have something you will actually use and we are confident that we keep good quality products in our store with No Junk.
Price Match Promise
Shipping around for the best price is tough, we make it easier by offering the best pricing in the market. But if you find a better price on an in-store item somewhere else we will match it!
Description du produit
L-Para is a brand new dual narrowband 10nm light pollution filter. The FWHM of L-Para is 10nm for OIII (500.7nm) and H-Alpha (656.3nm) respectively. The transmittance of nebulae emission lines at are both greater than 85% in system with focal ratios of F2 and above. It effectively filters out mercury lamps, sodium lamps, and LED light pollution emission lines.
At the same time, it has excellent contrast and anti-halo characteristics, allowing you to capture detailed and vivid nebula images. L-Para is suitable for both normal optical systems and fast optical systems, such as RASA and Hyperstar systems.
Even when light is incident at an oblique angle, it can still maintain high transmission rates to provide you with a clear and precise shooting experience
Features
- Broad Compatibility: A dual narrowband filter suitable for all telescope systems, adaptable to fast optics (focal ratios of F2, F2.8, F3.2, F4) as well as various standard/normal focal ratio telescopes.
- Light Pollution Reduction: Effectively cuts off emission lines from mercury lamps, sodium lamps, LEDs, and other light pollution sources, making it applicable to Bortle Scale1- 7 dark skies.
- High Transmission: In systems with a focal ratio of F2 and above, nebula emission lines OIII and Ha transmittance exceeds 85%, resulting in higher imaging efficiency.
- Excellent Contrast: The high transmittance of nebula emission lines (OIII & Ha) combined with a deep cut-off of light pollution bands significantly improves image contrast and detail richness.
- Anti-Halo Characteristics: The design has undergone several rounds of optimisation and repeated testing, resulting in a marked improvement in anti-halo performance, enhancing the capture of bright stars.
Specifications
| Substrate | Optical Glass |
| Thickness | 1.85mm |
| FWHM | OIII: 10±0.5nm | Ha: 10±0.5nm |
| Transmittance | T>85% @ 500.7nm & 656.3nm |
| Blocking Range | 300-1000nm |
| Blocking | OD ave>4 |
| Surface quality | 60/40 |
Articles, vidéos et liens supplémentaires
Astrophotographie pour les débutants Étape 4 : Prendre des images du ciel profond
Prendre des photos du ciel profond peut être intimidant, heureusement, il existe un processus simple à suivre pour vous permettre d'obtenir de superbes photos ! Voici le processus typique pour pren...
Astrophotographie pour les débutants Étape 3 : Choisir l'équipement pour l'imagerie du ciel profond
L'utilisation d'un capteur d'étoiles vous permet d'acquérir de l'expérience avec les principes fondamentaux de l'imagerie du ciel profond. Tirer sur la Lune vous permet d'acquérir de l'expérience ...
Astrophotographie pour les débutants - Commencer ici : Entrer dans l'astrophotographie étape par étape
Photographier le ciel nocturne n'a jamais été aussi populaire, ni aussi facile. Le choix d'équipement n'a jamais été aussi meilleur, ni plus abordable. Cependant, selon les conseils donnés par Dick...
Astrophotographie pour les débutants Étape 1 : Utilisation du Star Adventurer Tracker
Le moyen de loin le plus économique et le plus simple de capturer de belles images de la Voie lactée et de grands objets du ciel profond comme la galaxie d'Andromède (illustré ici) est d'utiliser u...
Astrophotographie pour les débutants Étape 2 : Comment photographier la Lune
Les gros plans de la Lune sont gratifiants et constituent un moyen facile d'apprendre à photographier à travers votre télescope. Bien que de bons résultats soient possibles avec un appareil photo d...