Sirius Minus Violet Eyepiece Filter MV20

The Sirius Minus Violet Eyepiece Filter MV20 is a specialised corrective filter that greatly reduces

Unbranded Sirius Minus Violet Eyepiece Filter MV20

The Sirius Minus Violet Eyepiece Filter MV20 is a specialised corrective filter that greatly reduces the false colour fringing of blue-violet light. This halo effect is most noticeable in relatively low cost achromatic refractor telescopes. The MV20 incorporates a formula that minimizes percieved colour shift. Unlike the MV1, the MV20 attenuates the yellow region more aggressively, while blocking most of the violet/blue region. Another difference between the MV1 and MV20 is that the MV20 does no

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