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The TeleVue 1.25" OIII filter provides a large increase in contrast with planetary nebulae.
Bandmate filters yield bright, sharp and contrasty images — even in the optically sensitive position in front of the diagonal. Optical quality ground and polished BK-7 substrate means no loss of sharpness - even when used in front of mirror diagonals.
As part of our 100% quality control, every single filter is checked optically and cosmetically to assure performance. Every filter is individually serialized.
