Skyglow Filter Optolong 1.25"

Name: Skyglow Filter Optolong 1.25"
Brand: Optolong
SKU: OTLOG-SKYGLOW-125
Price: 26.41 EUR
Availability: PreOrder

Reference OTLOG-SKYGLOW-125

Stock at Supplier

26.41 34.67 -8.26

VAT excluded Shipping 5/7d

SKYGLOW Optolong interference filters designed to enhance deep sky observation in moderate light pollution conditions, blocking most wavelengths (skyglow and artificial light) that cause light pollution. In contrast, their transmission is maximal for H α and β, significantly increasing the contrast of nebulae, galaxies and star clusters.

Buy it now and receive it between on Tuesday, 7 January and Tuesday, 14 January with Home delivery - International

Delivery Options

Carrier		Description	Estimated Delivery
	Home delivery - International	Home delivery - International	Tuesday, 7 January - Tuesday, 14 January

Home delivery - International

Estimated delivery:
Tuesday, 7 January - Tuesday, 14 January

✖

Description
Product Details

Skyglow Filter Optolong 1,25"

SKYGLOW Optolong filters are interference filters designed to enhance deep sky observation in moderate light pollution conditions. They are designed to darken the background sky by blocking skyglow light (589nm); likewise, they also block most wavelengths of artificial light that cause light pollution, mainly those produced by mercury or sodium vapor lamps. In contrast, their maximum transmission corresponds to the hydrogen alpha and beta wavelengths. The background of the polluted sky, generally milky, appears darker and the contrast increases significantly, especially in the case of diffuse nebulae, such as Orion or the Lagoon. The improvement is also noticeable in galaxies and star clusters and even increases the contrast of the Moon.

Although this is an extremely versatile filter, its ideal use is for visual observation and astrophotography of planetary nebulae

Technical Specifications

Thickness: 2.0mm
Surface quality: 60/40 (refer to MIL-O-13830)
Optically polished to ensure a precision λ /4 wavefront and parallelism of λ /4
Multi-layer anti-reflective coating
Non-cementitious optical substrate coating
Its outermost coating with ion-assisted electron beam evaporation deposition technology gives it enhanced durability and scratch resistance, as well as CWL (center wavelength) stability unaffected by temperature changes.
The planetary rotation system provides precision and homogeneity of coatings, ensuring high value in through-band transmission and out-of-band optical density
The aluminum cell is manufactured by CNC machines requiring extreme manufacturing precision. The cell is of high fineness, the total aperture is 26 mm for the 1.25" (31.75 mm) size.

Skyglow Filter Optolong 1.25" (31.75 mm)

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