Le filtre CCD L-Pro améliore le contraste des objets du ciel profond et réduit l'arrière-plan du ciel
- blocks UV and IR (700 - 1100 nm)
- high transmission at passband
- high optical quality
- The L-Pro Nebula filter permits roughly 3x longer exposure times than without a filter and therefore improves contrast significantly.
- in cell for insertion into Sony cameras with full-frame sensor
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 |
| 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: | Cell for insertion into Sony cameras with full-frame sensor |