Optolong

Optolong IR Pass 1.25in Filter Atmospheric seeing and distortion is much reduced at longer IR wavelengths and as such, the IR Pass 685nm filter is designed to block wavelengths below 670nm and can be...

Optolong IR Pass 2in Filter Atmospheric seeing and distortion is much reduced at longer IR wavelengths and as such, the IR Pass 685nm filter is designed to block wavelengths below 670nm and can be...

Optolong L-eNhance 1.25in Filter Designed for DSLR (digital SLR), color CMOS and monochrome CCD cameras. Isolates the H-Alpha, H-Beta, and Oxygen III nebula emission lines and achieves a maximum...

Optolong L-eNhance 2in Filter Designed for DSLR (digital SLR), color CMOS and monochrome CCD cameras. Isolates the H-Alpha, H-Beta, and Oxygen III nebula emission lines and achieves a maximum...

Optolong L-eNhance EOS-C Filter Designed for DSLR (digital SLR), color CMOS and monochrome CCD cameras. Isolates the H-Alpha, H-Beta, and Oxygen III nebula emission lines and achieves a maximum...

Optolong L-eXtreme 2in Filter   L-eXtreme is a two 7nm bandpass filter which can be used with one-shot color cameras like DSLR's (digital SLR), and monochrome CCD cameras, it is also more suited...

Optolong L-Pro 1.25in Filter L-Pro is a multi-bandpass filter offering better color balance by maximizing the transmission band.  A good choice for light pollution suppression.

Optolong L-Pro 2in Filter L-Pro is a multi-bandpass filter offering better color balance by maximizing the transmission band.  A good choice for light pollution suppression.

Optolong L-Pro EOS-C Filter L-Pro is a multi-bandpass filter offering better color balance by maximizing the transmission band.  A good choice for light pollution suppression.

Optolong L-Pro EOS-FF Filter L-Pro is a multi-bandpass filter offering better color balance by maximizing the transmission band.  A good choice for light pollution suppression.

Optolong L-Pro NIK-FF Filter L-Pro is a multi-bandpass filter offering better color balance by maximizing the transmission band.  A good choice for light pollution suppression.

Optolong L-Pro SONY-FF Filter L-Pro is a multi-bandpass filter offering better color balance by maximizing the transmission band.  A good choice for light pollution suppression.

Optolong Moon and SkyGlow 1.25in Filter Designed to darken the background sky by blocking light transmission from skyglow 589nm and many street light emissions from artificial light. 

Optolong Moon and SkyGlow 2in Filter Designed to darken the background sky by blocking light transmission from skyglow 589nm and many street light emissions from artificial light. 

Optolong OIII 6.5nm 1.25in Filter Designed for nebula observation allowing 6.5nm bandwidth of light centered on a wavelength of 500nm through. which corresponds to OIII emission lines. Reduces the...

Optolong OIII 6.5nm 2in Filter Designed for nebula observation allowing 6.5nm bandwidth of light centered on a wavelength of 500nm through. which corresponds to OIII emission lines. Reduces the...

Optolong OIII 6.5nm 31.2mm Filter

Optolong OIII 6.5nm 36.2mm Filter Designed for nebula observation allowing 6.5nm bandwidth of light centered on a wavelength of 500nm through. which corresponds to OIII emission lines. Reduces the...

Optolong Variable Polarizer 1.25in Filter

Optolong Variable Polarizer 2in Filter   Adjust the brightness level of the Moon, Venus, and other bright objects with the Optolong Variable Polarizer. A standard Moon Filter is like a pair of...

Optolong Venus U 1.25in Filter Image Venus in the UV-A (320-400nm) and observe Venus’ cloud structures.

Optolong Venus U 2in Filter Image Venus in the UV-A (320-400nm) and observe Venus’ cloud structures.