Optolong
Optolong 1.25"/2" Venus U Planetary Filter... from $244.99
Optolong Venus-U filter makes it possible to obtain photographs, CCD or video images in the UV-A (320-400nm) and observe Venus’ cloud structures. Main Use Use with monochrome CCD cameras and you need to remove the cover glass of sensor and internal UV-IR blocker in order to pass UV light. The same holds true for mono DSLRs that its built-in low pass filter needs to be removed. What’s more, you need a special UV lens together with camera body. The sensor of CCD or CMOS cameras is capable of detecting light in the 350-1100nm range. Other Uses: Act as an outstanding...
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Optolong
Optolong CF (Clear Focusing) Broadband Fil... $39.95
The Optolong Clear Focusing Filter is designed to pass the visible spectral region (420nm-680nm) with 98.5% transmission Use of astrophotography filters, especially narrowband filters, often results in dim images which can be difficult to focus. Clear focusing filters can be used first to clearly focus the image. Acts as an outstanding dust shield, which prevents the possibility of dust settling on the lens during long time exposure. WARNING: The filters of Optolong are not designed for sun observation. DO NOT LOOK AT THE SUN WITH OPTOLONG FILTER. You would be BLIND if you fail to observe the warning.
Optolong
Optolong CLS (City Light Suppression) Broa... $67.95
The CLS (City Light Suppression) broadband filter is designed to improve the visibility of various deep sky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapour lamps, both high & low pressure sodium vapour lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm), H-alpha(656nm) as well as SII(672nm), the filter is suitable for enhancing the contrast and details for both visual and photographic...
Optolong
Optolong CLS (City Light Suppression) Broa... $109.95
The CLS (City Light Suppression) broadband filter is designed to improve the visibility of various deep sky objects. By selectively reducing the transmission of wavelengths of light pollutants, specifically those produced by artificial lightings including mercury vapour lamps, both high & low pressure sodium vapour lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Together with the highly transparent in main nebula emission lines at OIII(496nm and 500nm), H-beta (486nm), NII(654nm and 658nm), H-alpha(656nm) as well as SII(672nm), the filter is suitable for enhancing the contrast and details for both visual and photographic...
Optolong
Optolong H-Alpha 7nm Narrowband Filter 36m... $249.95
Optolong improved version of H-Alpha 7nm filter is the popular narrowband filter allowing 7nm bandwidth of light centered on a wavelength of 656nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapour, and both high and low pressure sodium vapour lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Better choice of narrowband H-alpha astrophotography filter for highest contrast and revealing subtle nebula details. Description Suitable for viewing on faint emission nebula of H-Alpha line in full moonlight or in severe light pollution....
Optolong
Optolong Hydrogen-Alpha 7nm Narrowband Fil... $224.95
Optolong improved version of Hydrogen-Alpha 7nm filter is the popular narrowband filter allowing 7nm bandwidth of light centered on a wavelength of 656nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapour, and both high and low pressure sodium vapour lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Better choice of narrowband H-alpha astrophotography filter for highest contrast and revealing subtle nebula details. Description Suitable for viewing on faint emission nebula of Hydrogen-Alpha line in full moonlight or in severe light pollution....
Optolong
Optolong Hydrogen-Alpha 7nm Narrowband Fil... $331.95
Optolong improved version of Hydrogen-Alpha 7nm filter is the popular narrowband filter allowing 7nm bandwidth of light centered on a wavelength of 656nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapour, and both high and low pressure sodium vapour lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i.e. skyglow). Better choice of narrowband H-alpha astrophotography filter for highest contrast and revealing subtle nebula details. Description Suitable for viewing on faint emission nebula of Hydrogen-Alpha line in full moonlight or in severe light pollution....
Optolong
Optolong IR Pass685 Planetary Filter 1.25"... $99.95
Optolong IR Pass 685nm filter is designed to block wavelengths below 670nm and can be used in IR-LRGB imaging to produce a sharper luminance image for the best planetary contrast as atmospheric seeing and distortion is much reduced at longer IR wavelengths. Description The sensor of CCD or CMOS cameras is capable of detecting light in the 350-1100nm range including infrared wavelengths. Thus RGB planetary images taken with IR as the luminance channel have visible-enhanced contrast and surface detail than standard LRGB images. Spectrum and Characteristic Substrate: B270 Thickness: 1.85mm Tave: T>90% Blocking range: 350-1050nm Blocking depth: light pollution line...
Optolong
Optolong L-eNhance Light Pollution Filter ... $239.95
The relentless spread or urbanization and its associated light pollution have become a growing problem for all amateur astro photographers. The current solutions to the problem can be expensive and might include the purchase of a monochrome camera, several types of narrowband filters and a filter wheel. Description Optolong L-eNhance provides an economical and practical solution for amateurs. It is a dual-band pass filter which has been designed for DSLR (digital SLR), colour CMOS and monochrome CCD cameras. The convenience and cost effectiveness of this filter allows amateurs to image a rich selection of astronomical images, even in bright, heavily...
Optolong
Optolong L-eNhance Light Pollution Filter ... $294.95
The relentless spread or urbanization and its associated light pollution have become a growing problem for all amateur astro photographers. The current solutions to the problem can be expensive and might include the purchase of a monochrome camera, several types of narrowband filters and a filter wheel. Description Optolong L-eNhance provides an economical and practical solution for amateurs. It is a dual-band pass filter which has been designed for DSLR (digital SLR), colour CMOS and monochrome CCD cameras. The convenience and cost effectiveness of this filter allows amateurs to image a rich selection of astronomical images, even in bright, heavily...
Optolong
Optolong L-eXtreme Dual-Band Narrow Band F... $304.95
L-eXtreme is a two 7nm bandpass filter which can be used with one-shot colour cameras like DSLR's (digital SLR), and monochrome CCD cameras, it is also more suited for fast systems. The convenience and cost effectiveness of this filter allows amateurs to image a rich emission nebulas, even in bright, light pollution skies. Optolong believes the design of L-eXtreme filter would be better choice for fast systems in competitive price. It isolates the H-Alpha, and Oxygen III nebula emission lines so that the contrast and signal-to-noise ratio between nebulae were maximized. For people who is living in very light polluted...
Optolong
Optolong L-eXtreme Dual-Band Narrow Band F... $379.95
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 for fast systems. The convenience and cost effectiveness of this filter allows amateurs to image a rich emission nebulas, even in bright, light pollution skies. Optolong believes the design of L-eXtreme filter would be better choice for fast systems in competitive price. It isolates the H-Alpha, and Oxygen III nebula emission lines so that the contrast and signal-to-noise ratio between nebulae were maximized. For people who is living in very light polluted...

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