Enhance your deep sky viewing with the latest in multi-layer coating technology in filters from Thousand Oaks Optical. Their filters transmit desired wave-lengths in a very steep slope vs. gentle transition slopes in competitive brands. This means better contrast and overall performance.
The Minus Violet filter is designed to help eliminate color fringing in refractor telescopes.
Sep 5, 2014
Don't buy this filterPros:
Poor Lens Quality,Not Removing Purple FringComments:
The item was purchased for removing the achromatic aberration of a 120mm achromat refractor. Even though I didn't expect it to remove all the abberation, I was very much surprised to see that the aberration was not affected at all by the presence of this filter.
This review was provided courtesy of AgenaAstro.comSep 17, 2013
Thousand Oaks Optical Minus Violet FilterPros:
Compact,Strong Construction,Quality Lenses,Accurate,Easy to Use,LightweightCons: Comments:
Works as it is supposed to. I got it several months ago and just got a chance to use it on a bright star. I found it to work perfect.
This review was provided courtesy of AgenaAstro.comSort by