Optolong Filtre L-Pro 2"
Le filtre L-Pro CCD améliore le contraste des objets du ciel profond et réduit l’arrière-plan du ciel.
- bloque les rayons UV et IR (700 - 1100 nm)
- transmission élevée en bande passante
- amélioration de la balance des couleurs pour les reflex numériques et les caméras astro couleur uniques, p. ex. Caméras couleur ASI refroidies ou non par ZWO.
- haute qualité optique
- dans une cellule filtrante de 2 "
- Le filtre L-Pro Nebula permet des durées d'exposition environ 3 fois plus longues que sans filtre et améliore donc considérablement le contraste.
These filters allow for astrophotography close to a city and deliver optimal results. Optolong L-Pro nebula filters cause a significant contrast enhancement and therefore enable longer exposure times with DSLRs, color and mono astro cameras.
The exposure time can be multiplied by a factor of 3. This means, that you are able to expose three times as long than without a filter, before the sky background becomes visible. On the contrary, the light which the nebula emits passes unhindered. This results in a significant contrast enhancement and makes nebula photography possible, where it otherwise would not, even close to cities. Galaxy and cluster photography also greatly benefits from the L-Pro.
Substrate: | High-quality optical glass |
Thickness: | 1.85 mm |
Surface Treatment: | Fine-optically polished |
Surface Polish Quality: | 60/40 (Refer to MIL-O-13830) |
Surface Quality: | 1/4 wavefront |
Transmission: | approx. 95% at passband |
Cell: | Filter cell 2", black anodized, laser engraved |
Clear Aperture: | 45 mm |