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ASTRODON SET FILTRI LRGB SERIE E quadrati da 50 mm di lato non montati in cella Visualizza ingrandito

Set Astrodon Filters Lrgb Series Square By 50 mm Side Not Mounted In Cell




"Set Filter Lrgb Generation 2 Square With Sides 50mm Unmounted

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1 813,00 €

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"SET FILTER LRGB Generation 2 square with sides 50mm unmounted ideal for large-format sensors as KAF16803 and KAF9000.

All filters are parfocal Astrodon:
most frustration in 'astrophotography with CCD is that of having to find the correct firing position with the H-alpha filter: the narrow band filters keep out much light so you must use a very bright star to perfect focus. All the filters Astrodon Tru-Balance L, C, R, G, B, H-Alfa, OIII and SII are parfocal on optics with focal ratio less than f / 4. Login This means you can adjust the focus by using a filter or C G, install a filter H-Alpha and immediately proceed with the acquisition of the image. This is one of the key advantages of the Tru-Balance filters Astrodon that made them so popular in a short time. The thickness of the filter determines
As it can be parfocal: Tru-Balance filters are dichroic filters with very resistant treatments deposited on a single glass substrate of high quality. The reduced thickness (3mm) of this substrate is controlled accurately with error +/- 0.05mm. The change from lot to lot is less than 0.1mm, measuring slightly less than the critical areas of focus of a system f / 5. On request it is possible to select within various batches filters with less variation and then get a set of filters that have the exact same thickness (prices on request).


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