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William Optics has yet again revolutionized the after market diagonal! The William Optics 2" Dura Bright Diagonal has a 15mm thick mirror and dielectric mirror coatings for 99% reflectivity which provides higher contrast and resolution during critical planetary, lunar and binary star observations. Wave mirror accuracy has been further enhanced to 1/15th. Overall this diagonal is a significant enhancement over previous versions.
The 2" Dura Bright Dielectric Diagonal from William Optics is strikingly beautiful and will look great in any telescope. More impressive is its optical integrity and performance. If you are looking for a 2" Dielectric Diagonal this is a no brainer.