GSO's new 1.25" dielectric diagonal continues their tradition of offering superb products at excellent prices. This beautiful1.25" mirror diagonal features a BK7 mirror that is precision ground to a flatness of 1/10th wave (minimum) and features dielectric 6-layer enhanced silver coatings with an over-coat protective layer for a light efficiency of over 99% reflectivity across the entire visual spectrum. The clear aperture is 27.9mm.
The mechanics of this diagonal are also top-notch. The robust aluminum body and attachment barrels are precision CNC machined to strict tolerances from solid stock throughout. The 1.25" nosepiece features a safety groove and is threaded to accept standard 1.25" astronomy filters. The 1.25" eyepiece holder does not have a brass compression ring, but it includes an internal safety stop to prevent long barrels on some eyepieces and barlows from hitting the diagonal mirror. The diagonal sports a handsome anodized finish.
The combined result is a superb diagonal offering excellent mechanical and optical quality at a great price. Dielectric coatings are more durable than regular or enhanced aluminum coatings, so you will enjoy years of excellent performance from this product.
The diagonal comes in a nice foam-fitted storage box and includes 2 end caps. Weight = 5.7oz.. Made in Taiwan.
rmscott59 New Member
- Skill Level
- Time with Product
Apr 7, 2014
- User Notes:
- Review by rms of San Francisco, CA.
A great value diagonal!Pros:
Quality Lenses,Easy to Use,Strong ConstructionCons: Comments:
This is a great diagonal. I have a GSO Quartz and an Astro Tech Dielectric and can see no difference visually between them and this GSO. I love this model because it has no brass compression ring. I personally don't like the brass compression ring as it tends to snag the eyepiece as you insert/ remove it. I refit the lock thumbscrew with a nylon one to prevent scratching my eyepieces. THIS IS A GREAT DIAGONAL FOR A GREAT PRICE!
This review was provided courtesy of AgenaAstro.comSort by