Filters




Manufacturer Product Image Item Name Price+
GSO Neutral Density 13%T Density 0.9

Neutral Density 13%T Density 0.9

Eyepiece filters are an invaluable aid in lunar and planetary observing. They reduce glare and light scattering, increase contrast through selective...
R212

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GSO Neutral Density 25%T Density 0.6

Neutral Density 25%T Density 0.6

Eyepiece filters are an invaluable aid in lunar and planetary observing. They reduce glare and light scattering, increase contrast through selective...
R212

Add:

GSO Neutral Density 50%T Density 0.3

Neutral Density 50%T Density 0.3

Eyepiece filters are an invaluable aid in lunar and planetary observing. They reduce glare and light scattering, increase contrast through selective...
R212

Add:

GSO Orange filter #21

Orange filter #21

Eyepiece filters are an invaluable aid in lunar and planetary observing. They reduce glare and light scattering, increase contrast through selective...
R212

Add:

GSO Red filter #25

Red filter #25

Eyepiece filters are an invaluable aid in lunar and planetary observing. They reduce glare and light scattering, increase contrast through selective...
R212

Add:

GSO Violet filter #47

Violet filter #47

Eyepiece filters are an invaluable aid in lunar and planetary observing. They reduce glare and light scattering, increase contrast through selective...
R212

Add:

GSO Yellow filter #12

Yellow filter #12

Eyepiece filters are an invaluable aid in lunar and planetary observing. They reduce glare and light scattering, increase contrast through selective...
R212

Add:

GSO Yellow-Green Filter #11

Yellow-Green Filter #11

Eyepiece filters are an invaluable aid in lunar and planetary observing. They reduce glare and light scattering, increase contrast through selective...
R212

Add:

GSO IR Blocking Filter 1.25"

IR Blocking Filter 1.25"

This filter has an extremely sharp cutoff at 690nm yet leaves all the visible red, including the important 656nm H-alpha emission line, preventing IR...
R222

... more info
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GSO UHC Filter

UHC Filter

The original Ultra-High-Contrast narrow bandpass filter (24nm) isolates just the two doubly-ionized oxygen lines (496 and 501nm lines) and H-beta...
R261

... more info
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