Tele Vue Bandmate OIII Filter - 1.25" Round Mounted
Tele Vue Bandmate OIII Filter - 1.25"
Thanks to ion beam technology and high quality optical glass the TeleVue BandMate OIII filter produces low scatter in a hard stable coating to reduce changes due to temperature and humidity. The optical quality ground and polished BK7 glass yields sharp star images ƒ??????????? even when filter is placed in front of diagonal. When you buy Tele Vue, you're assured of 100% quality control: Every filter is checked optically and cosmetically to assure performance and individually serialized.
Televue Product Number: BFO-0125
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Description says for large telescopes. Does it block too much light to be useful for small apertures? What is the smallest aperture recommended to use this filter with? Thx.
Generally speaking, OIII filters work best on telescopes with 8" or larger aperture. Below 8", a UHC filter is recommended to allow a little more light through.