Name: L-eXtreme
Brand: Optolong
SKU: 1e0b83ac-6f53-41a1-a634-c90b13b2bbce
Price: 6800 ZAR
Availability: BackOrder

Optolong L-eXtreme is a dual-narrowband filter (OIII-7nm & Ha-7nm) designed to exclusively transmit the key nebula emission lines of OIII (500.7nm) and Hα (656.3nm). By effectively blocking all other light pollution emission lines, it ensures that only the signals from OIII and Hα elements are captured during imaging, achieving maximum effective transmission to deliver clean, high-contrast OSC nebula data under light pollution and even with some moonlight.

Key features

Dual 7 nm windows centred at OIII (~500.7 nm) and H-α (~656.28 nm) for tight nebula contrast.
Strong out-of-band blocking – OD4 from 300–1000 nm to suppress LP glow and stray light.
Durable coatings – multi-layer AR with ion-assisted deposition for stability and scratch resistance.
Format – 2″ mounted (M48×0.75); 1.85 mm optical glass substrate.

Key features

Dual 7 nm windows centred at OIII (~500.7 nm) and H-α (~656.28 nm) for tight nebula contrast.
Strong out-of-band blocking – OD4 from 300–1000 nm to suppress LP glow and stray light.
Durable coatings – multi-layer AR with ion-assisted deposition for stability and scratch resistance.
Format – 2″ mounted (M48×0.75); 1.85 mm optical glass substrate.