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Observing Basics: Filters

Not seeing enough detail on planets? Light pollution getting you down? In each case, the solution may be a small piece of glass.
RELATED TOPICS: FILTER | OBSERVING

How much light gets through?
This list show the most common color filters along with the percentage of light they transmit.

Color filter
 Transmission (percent)
Color filter
Transmission (percent)
#3 Light Yellow
88 #32 Magenta
13
#8 Yellow
83
#38A Dark Blue
17
#11 Yellow-Green
40
#44 Light Blue-Green
16
#12 Yellow (minus Blue)
74
#47 Violet
03
#15 Deep Yellow
66
#56 Light Green
53
#16 Yellow-Orange
58
#58 Green
24
#21 Orange
46
#80A Blue
28
#22 Deep Orange
36
#81A Light Orange
82
#23A Light Red
25
#82A Light Blue
73
#25 Red
14
#85 Amber
63
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StarDome

Check out Astronomy.com's interactive StarDome to see an accurate of your sky. This tool will help you locate this week's targets.

Intro to the Sky: Get to know the night sky
Learn how to use star charts, find constellations, and observe the brightest objects in your night sky with in this handy reference section.

The Sky this Week
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ObservingforBeginners_MedRec
Observing the night sky is a fun and easy activity that anyone can do, but getting started can be daunting for beginners.
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