Sirius Colour Filter No. 25 Red

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Sirius Colour Filter No. 25 Red
AUD $19.00

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#25 Red – The red filter blocks blue and green light nearly in total, which means you get a very strong contrast, for instance, between bluish toned structures and the brighter details on Jupiter's and Saturne's clouded surface. However, this filter is mainly used to observe Martian polar caps.

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