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DGM NPB narrowband nebula filter 2",23nm bandwidth provides superb contrast on emission features, red transmission enhances visual use.
- *2" size
*23nm narrow bandwidth for superb contrast
*red transmission enhances visual and imaging uses
*small case takes up less room in case
*hard, durable coatings
The NPB is the ONE filter to have if you have just one, and now regarded as the top narrowband (UHC type) filter in the world. Judged by renown astro-equipment author Phil Harrington as the best of nine leading competitors in the Astronomy Magazine review "Secret Weapons" (August 2005). With the NPB more objects show enhancement, than any other filter in it`s class, and is also a useful Imaging filter. Visually bright nebula seem to be "switched on" with this top shelf filter designed by Dan McShane, Optical Thin Film expert and founder of DGM Optics. One observer described the NPB as a "UHC on steroids"! And, with ultra durable Ion Assisted Plasma Coating Technology used to produce your NPB Filter, it will provide decades of flawless performance.
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filter
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H-II Gas cloud
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planetary nebula
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Wolf-Rayet Excitation
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Dark
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Reflection
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Faint H emitting
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planets
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Baader
UHC-S
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x
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x
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x
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x
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Astronomik
UHC
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x
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x
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x
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Astronomik
O-III
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x
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x
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Astronomik
H-ß
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x
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TeleVue
Nebustar
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x
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x
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x
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TeleVue
O-III
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x
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x
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TeleVue
H-ß
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x
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DGM
NPB
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x
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x
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x
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Baader
Contrast Booster
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x
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Baader
Moon & Sky Glow
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x
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Lumicon
UHC
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x
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x
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x
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Lumicon
O-III
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x
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x
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Features
- *2" size
*23nm narrow bandwidth for superb contrast
*red transmission enhances visual and imaging uses
*small case takes up less room in case
*hard, durable coatings
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DGM NPB Filter 
