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Ships within 48 hours · Estimated delivery Aug 10 - Aug 15
93 arcsecond
This filter retains true color balance since all wavelengths are transmitted uniformly over the entire spectrum
and a built in post for the azimuth control
you'll like the elegant attached lens cap as well as the included hard carry case
TeleVue Product Number: ETH-13
William Optics Diffraction Spikes Bahtinov Focusing Mask - Dew Shield 243 mm to 308 mm - BM-DS-GR150 vendor-telegizmos 93 arcsecondWilliam Optics Diffraction Spikes Bahtinov Focusing Mask For Dew Shield 243 mm to 308 mm William Optics Diffraction Spikes Bahtinov Focusing Mask Fits dew shields with diameters of 243 mm to 308 mm Clear Acrylic Sheet design provides 92% light transmission Gives the Brightest diffraction spikes for focusing This is a William Optics Diffraction Spikes Bahtinov Focusing Mask made from Acrylic material, which is high in light transmission. This design
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