BAADER CMOS S-II NARROWBAND FILTER Size:2" 3 for wider views and

3 for wider views and with an image circle of 30mm

As with all Prima Luce Lab products

The adapter fits into the body of the ESATTO 2" and so doesn't add any optical length

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69 mm (minor axis)

BAADER CMOS S-II NARROWBAND FILTER Size:2" 3 for wider views andThe new Baader CMOS optimized S II 4nm 6. 5nm filter is a precision grade ultra narrowband filter with a high transmission at the Sulphur II line at 671. 7nm. It is designed to work very well with modern highly sensitive astronomy cameras and telescopes with focal ratios between f 15 to f 3. 4. The ultra narrow 4nm bandpass make these ideal for imaging under light polluted skies. The 6. 5nm versions are recommended for most cases where there is not a