Optolong L-Ultimate Filter 3nm 2 inch

Optolong L-Ultimate Filter 3nm 2 inch: 3 nm dual-band, the pinnacle of the L-series

The L-Ultimate is Optolong's narrowest and most advanced dual-band filter: 3 nm passband on both the H-alpha line (656.3 nm) and the OIII line (500.7 nm). Virtually all other light, from streetlights to moonlight and skyglow, is blocked.

Met deze bandbreedte fotografeer je emissienevels met maximaal contrast en signaal-ruisverhouding, zelfs vanuit de binnenstad. Het filter is bovendien geoptimaliseerd tegen halo’s: ook rond heldere sterren blijft het beeld schoon. De 2 inch uitvoering (M48) voorkomt vignettering op grote sensoren en past in 2 inch filterhouders en fotoadapters.

For the discerning image creator

Those who want to take their dual-band work to the highest level will arrive at 3 nm. However, the dark background and fine nebula structure that this filter delivers require precise focusing and a stable mount.

Technology

The optical glass is 1.85 mm thin, planoptically polished, and features multi-layer ion-assisted coatings for high transmission, temperature stability, and scratch resistance.

Featured accessories

A clear focus filter is practically indispensable at 3 nm for fast focusing; we are happy to provide that.

For whom yes and for whom no

• ✓ Gevorderde nevelfotografen met kleurencamera’s
• ✓ Those photographing under Bortle 8 or 9 or in moonlight
• ✗ Beginners in nebelfotografie: de L-eNhance of L-eXtreme is toleranter en voordeliger
• ✗ Fast optics around f/2: consider the L-Para, which is optimized for this

Specifications

You can find more accessories for this merk at the Optolong merk page.