Chroma LoGlow Broadband Light Pollution Reduction Filter - 1.25" Mounted
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This Chroma 1.25" round mounted LoGlow Light Pollution Reduction Filter has a standard male filter thread (M28.5x0.6 thread specification) and can be attached to any astronomy accessory that has a standard 1.25” female filter thread. The cell height is 7mm so it will fit inside virtually all filter drawers/holders and filter wheels on the market. However, please verify this with your accessory before purchase.
LoGlow Imaging
The LoGlow filter blocks common spectral lines from lighting sources. This filter provides balanced color for the visible spectrum while blocking most emission from metal-halide and vapor lamp sources which together contribute to sky glow.
About Chroma Filters
Chroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission. Highly precise and accurate, the passbands of Chroma filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with focal ratios of f/4 or slower.
Cleaning, Handling, and Orientation
Handle Chroma filters by the edges only. Clean gently only if necessary. Loose particles should be removed with a bulb puffer or filtered, pressurized air cleaner. If necessary, gently wipe surface using anhydrous alcohol and lint-free lab towels. Use new surface of towel with each wipe.
- AVOID TOUCHING OR WIPING A/R COATED OR METAL MIRROR SURFACES
- AVOID HANDLING EXPOSED COATINGS WITH BARE FINGERS
Proper orientation of the filter is recommended for maximize performance. These filters should be mounted with the coated surface toward the light source and the AR-coated side towards the camera sensor. The AR-coated side can be easily identified because you can look right through the AR side into the filter. The front side, on the other hand, is highly reflective to prevent unwanted light from passing through.
Useful Resources
Filter Cell Specifications
D = Filter Cell Diameter = 31.0 mm / 1.22 in
T = Total Filter Height = 7 mm / 0.28 in
C = Filter Cell Height (Excluding Male Thread) = 5.25 mm / 0.21 in
M = Male Thread Length = 1.75 mm / 0.07 in
F = USABLE Female Filter Thread Length = Not threaded, so you cannot stack additional filters
S = Glass Substrate Thickness = 3 mm / 0.12 in for all Chroma filters, except LoGlow filters which are 1.1 mm / 0.04 in thick
CA = Clear Aperture = 26.5 mm / 1.04 in
Other Information
- Country of Manufacture: United States
This Chroma 1.25" round mounted LoGlow Light Pollution Reduction Filter has a standard male filter thread (M28.5x0.6 thread specification) and can be attached to any astronomy accessory that has a standard 1.25” female filter thread. The cell height is 7mm so it will fit inside virtually all filter drawers/holders and filter wheels on the market. However, please verify this with your accessory before purchase.
LoGlow Imaging
The LoGlow filter blocks common spectral lines from lighting sources. This filter provides balanced color for the visible spectrum while blocking most emission from metal-halide and vapor lamp sources which together contribute to sky glow.
About Chroma Filters
Chroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission. Highly precise and accurate, the passbands of Chroma filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with focal ratios of f/4 or slower.
Cleaning, Handling, and Orientation
Handle Chroma filters by the edges only. Clean gently only if necessary. Loose particles should be removed with a bulb puffer or filtered, pressurized air cleaner. If necessary, gently wipe surface using anhydrous alcohol and lint-free lab towels. Use new surface of towel with each wipe.
- AVOID TOUCHING OR WIPING A/R COATED OR METAL MIRROR SURFACES
- AVOID HANDLING EXPOSED COATINGS WITH BARE FINGERS
Proper orientation of the filter is recommended for maximize performance. These filters should be mounted with the coated surface toward the light source and the AR-coated side towards the camera sensor. The AR-coated side can be easily identified because you can look right through the AR side into the filter. The front side, on the other hand, is highly reflective to prevent unwanted light from passing through.
This Chroma 1.25" round mounted LoGlow Light Pollution Reduction Filter has a standard male filter thread (M28.5x0.6 thread specification) and can be attached to any astronomy accessory that has a standard 1.25” female filter thread. The cell height is 7mm so it will fit inside virtually all filter drawers/holders and filter wheels on the market. However, please verify this with your accessory before purchase.
LoGlow Imaging
The LoGlow filter blocks common spectral lines from lighting sources. This filter provides balanced color for the visible spectrum while blocking most emission from metal-halide and vapor lamp sources which together contribute to sky glow.
About Chroma Filters
Chroma manufactures the highest quality astronomy filters with durable, sputtered hard coatings using single substrates of the best glass, eliminating the need for laminations. All primary filter coatings are applied on the front surface and anti-reflection coatings on the rear surface to prevent ghosting and to maximize transmission. Highly precise and accurate, the passbands of Chroma filters remain spectrally stable and do not drift in response to extreme temperature fluctuations or changes in humidity. All filters may be used with focal ratios of f/4 or slower.
Cleaning, Handling, and Orientation
Handle Chroma filters by the edges only. Clean gently only if necessary. Loose particles should be removed with a bulb puffer or filtered, pressurized air cleaner. If necessary, gently wipe surface using anhydrous alcohol and lint-free lab towels. Use new surface of towel with each wipe.
- AVOID TOUCHING OR WIPING A/R COATED OR METAL MIRROR SURFACES
- AVOID HANDLING EXPOSED COATINGS WITH BARE FINGERS
Proper orientation of the filter is recommended for maximize performance. These filters should be mounted with the coated surface toward the light source and the AR-coated side towards the camera sensor. The AR-coated side can be easily identified because you can look right through the AR side into the filter. The front side, on the other hand, is highly reflective to prevent unwanted light from passing through.
Useful Resources
Filter Cell Specifications
D = Filter Cell Diameter = 31.0 mm / 1.22 in
T = Total Filter Height = 7 mm / 0.28 in
C = Filter Cell Height (Excluding Male Thread) = 5.25 mm / 0.21 in
M = Male Thread Length = 1.75 mm / 0.07 in
F = USABLE Female Filter Thread Length = Not threaded, so you cannot stack additional filters
S = Glass Substrate Thickness = 3 mm / 0.12 in for all Chroma filters, except LoGlow filters which are 1.1 mm / 0.04 in thick
CA = Clear Aperture = 26.5 mm / 1.04 in
Other Information
- Country of Manufacture: United States
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Chroma LoGlow Broadband Light Pollution Reduction Filter - 1.25" Mounted