Sunday, January 24, 2010

Wratten #12 yellow filter

Just recieved an ASTRONZ #12 Wratten to try this season on the C14. We are going to also use the Ted Argos focal reducer this season. We are hoping to get improved FWHM with the optics working at their designed spacing and also the reduced scpectrum will help as well. Testing as soon as we get a fine evening.

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