Dual-Band Filters

Optolong L-Ultimate Dual 3nm Filter 2" (48mm) + FREE Shipping + FREE LensPen HK$3,050.00 HK$2,750.00

Special introductory price offer $40 off, grab yours~ L-Ultimate Introduction The L-Ultimate is a 3nm dual band designed to drastically reduce the effect of light pollution, the dual 3nm bandpass isolate the nebulae's...

NEW Antlia ALP-T Dual Band 5nm Filter 2" (48mm) Mounted + Free Lens Pen + International Free Shipping HK$2,980.00

The Antlia ALP-T dual band 5nm filter is a dual line-pass filter which was designed to be used primarily with one-shot color (OSC) cameras such as DSLR's or astronomical OSC cameras. It can also be used as a narrowband...