SKU:94530756721
Optolong Hydrogen-Alpha 7nm Narrowband Filter 1.25" Mounted (OPT-H-ALPHA-7NM-125)
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Ships within 48 hours · Estimated delivery Jul 15 - Jul 20
Description
Optolong Hydrogen-Alpha 7nm Narrowband Filter 1.25" Mounted (OPT-H-ALPHA-7NM-125)Optolong improved version of Hydrogen Alpha 7nm filter is the popular narrowband filter allowing 7nm bandwidth of light centered on a wavelength of 656nm through, and reducing the transmission of certain wavelengths of light, specifically those produced by artificial light including mercury vapour, and both high and low pressure sodium vapour lights and the unwanted natural light caused by neutral oxygen emission in our atmosphere (i. e. skyglow).
5 Length with diagonal (inch) 36
The finderscope will likely have to be removed when storing the telescope
tapped for the connection to the 94EDPH’s reducer and at the other end the reducer
6 Tripod Weight (lbs) 7
Sony has developed the approx
and Oxygen III nebula emission lines and achieves a maximum transmission of up to 90%
25") Magnification w/ Included Eyepieces 26x (25mm)/65x (10mm) Included Case No
These models stand less than 3" out of your focuser and both are threaded for 1
60") Field Stop Diameter: 19
perfect for the Moon
4mm*5mm Diagonal 8
2 m) Interpupillary Distance (max): 72mm (2
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Exchange/Return Notes
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