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Astronomy > Filters > Nebulae filters > Broadband Filters > Optolong > Optolong Filters L-Ultimate 2"
Product no.: 76371

Filters L-Ultimate 2"

RRP: $ 428.00 Our price:
$ 413.00 incl. VAT, plus shipping costs
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Product description

This filter is a 3nm dual band designed to drastically reduce the effect of light pollution and the 3nm isolate the nebulae's emissions into H-Alpha (red) and OIII (green-blue). It blocks light pollution, maximizes the signal from nebulae, and darkens the sky background. It also blocks artificial light from mercury vapor lamps, high and low pressure sodium vapor lights, and unwanted natural light caused by the emission of neutral oxygen in our atmosphere.

Specifications

Capacity

Connection ( to eyepiece)
2"
Frame
2"
passband (nm)
OIII (500.7), H-alpha (656.3)
Half-value width (nm)
3

General

Type
Filters
Type of build
line filter

Area of application

Useful for photographs
yes
Anti light-pollution
yes
H-alpha
yes
Planetary nebulae
yes
Supernova remains
-
Visually useful
-
Hydrogen nebulae
yes
Nebulae & galaxies
no
Optolong Filters L-Ultimate 2"
Optolong Filters L-Ultimate 2"
Optolong Filters L-Ultimate 2"
Optolong Filters L-Ultimate 2"

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