Baader UBVRI Bessel U-Filter 36mm

Baader UBVRI-U bandpass filter, suitable from f/15 to f/1.8;
Classic photometric filter with passband according to Bessel ?
parfocal with all Baader filters of the same size;
Manufactured with state-of-the-art ion beam quenching and tempering technology /
Daylight-Proof;
Reflex blocker hard-coated and planotically polished ? with sealed
Coating edges (Life-Coat);
Blackened edges all around, with filter front indicator in shape
a black outer rim on the telescope side;
Equally suitable for modern CMOS cameras as well as for older CCD cameras.
Suitable for camera technologies