- Product Review: Check out Bill Paolini's excellent review of this diagonal at AstronomyConnect.com here.
Baader Planetarium's new 2" Broadband Hardcoated Silver (BBHS) mirror diagonal # 2456115 brings silver into the 21st Century. Silver has always been a superior coating to aluminum coatings (even 'enhanced' aluminum) due to its higher reflectivity across the visual spectrum. However, until now, even overcoated silver mirrors exhibited inferior durability to aluminum.
Baader's new proprietary hard dielectric coating process seals and protects the silver layer to give durability the equal of aluminum. Baader's BBHS dielectric coatings deliver high reflectivity across a wider visual spectrum, resulting in improved color contrasts when compared to aluminum and all-dielectric mirrors. The silver coatings also deliver noticeably less scatter than all-dielectrics, resulting in improved contrast that rivals a top quality prism.
The 2" Clicklock non-marring eyepiece holder delivers the same acclaimed simplicity and security as its smaller 1.25" Clicklock cousin. With an effortless 20 degree twist of the rubber knurled ring (which also includes a convenient fingertip lever), the clicklock holder clamps 2" eyepieces so securely that you can lift your scope with them. The unique action utilizes 3-point clamping which positively and accurately locks 2" eyepieces without any of the wobbling and misalignment that can occur with single point clamps.
The Baader 2" BBHS Mirror Star Diagonal incorporates another unique feature. The 2" Clicklock Holder and 2" nosepiece can both be removed to expose 2"x24tpi SCT threads, permitting integration of the diagonal into additional configurations through the use of the Baader Astro T-2 System components.
SCT Users: The diagonal body's input 2" threading is compatible with the standard Celestron/Meade 2" rear cell threads, enabling you to directly thread it onto your SCT. NexStar 8 or 8i users will find that this diagonal couples close enough to swing through zenith without hitting the RA base! Please note that a Baader SCT LockRing # 2458270 (sold separately) is required for direct attachment to SCTs.