Products

Optolong Clear Focusing Filter Optolong Clear focusing filter is designed to highly pass the visible spectral region 420-680nm at 98.5% transmissio...

Optolong Clear Sky Filter Screw on Lens 1. Optolong Clear Sky Filter Introduction A screw on filter with the easiest installation way like UV fi...

Optolong CLS (City Light Suppression) Broadband Filter 1.  Optolong CLS Introduction The CLS (City Light Suppression) broadband filter is designed ...

Optolong CLS CCD (City Light Suppression) Broadband Filter The CLS (City Light Suppression) broadband filter is designed to improve the visibility ...

Optolong H-Alpha 7nm Narrowband Filter Optolong improved version of H-Alpha 7nm filter is the popular narrowband filter allowing 7nm bandwidth of l...

Optolong Improved OIII 6.5nm Narrowband Filter Optolong improved extra Narrowband OIII-CCD 6.5nm filter is designed for nebula observation allowing...

Optolong IR Pass685 Planetary Filter Optolong IR Pass 685nm filter is designed to block wavelengths below 670nm and can be used in IR-LRGB imaging ...

Optolong L-eNhance Duo Band Filter The relentless spread or urbanization and its associated light pollution have become a growing problem for all a...

Optolong L-Extreme Dual-Band Astronomy NarrowBand Filter The advantage of the L-eXtreme filter is that there is no transmission between the H-beta ...

Optolong L-eXtreme F2 Fast Optics Dual Narrowband 2" Optolong L-eXtreme F2 is a dual-band (500.7 nm and 656.28 nm, FWHM=7 nm) narrowband pass filt...

Optolong L-Pro Filter The Optolong L-Pro Filter is designed to improve the visibility of various deepsky objects. By selectively reducing the trans...

Optolong L-Quad Enhance Filter L-Quad Enhance Filter (L-QEF) is a quad bandpass light pollution suppression filter for colour cameras. It effective...

Optolong L-Ultimate Filter It’s about a 3nm dual band designed to drastically reduce the effect of light pollution, the 3nm isolates the nebulae’s ...

Optolong LRGB Filter Set The Optolong LRGB Filter Set is designed for maximum contrast and with extremely high gradients for clear differentiation ...

Optolong Moon & Skyglow Filter Optolong Moon & Skyglow filter is designed to darken the background sky by blocking light transmission from ...

Optolong Narrowband H-Beta filter Opotlong narrowband H-beta filter is designed for nebula observation allowing 12nm bandwidth of light centered on...

Optolong Night Sky H-Alpha filter Night Sky H-Alpha filter (IR Pass 650nm) with 50% transition from blocking to passing at about 640nm and 95% or a...

Optolong SHO 3nm Narrowband Filters Kit Optolong SHO-3nm Narrowband Filters Introduction Optolong SHO-3nm filter kit includes SII 3nm, H-Alpha 3nm,...

Optolong SII 6.5nm Imaging Narrowband Filter Optolongimproved narrowband SII6.5nm filter (Sulful II for CCD) is designed for nebula observation all...

Optolong UV/IR CUT Optolong UV/IR Cut filter is designed for ultraviolet and infrared wavelength blocking to improve sharpness of the image as most...