Baader Planetarium's new 2" Broadadband Hardcoated Silver (BBHS) mirror diagonal 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 20degree twist of the rubber knurled ring (which also includes a convenient fingertip lever) , the clicklock holder clamps 2" eyepieces so securely 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 threads, permitting integration of the diagonal into additional configurations through the use of the 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, an additional Baader SCT LockRing is required for direct attach to SCTs.For more than 300 years, silver coatings were used For their extremely high reflectivity but the unprotected silver which prone to aging and tarnished. This is not the case with our new, proprietary and weatherproof coating of hardened silver. As has been proven, the combination of silver and temperature-resistant Sitall gives you the best viewing experience, without any light-loss, with total absence of haze. Just try it for yourself - you'll be impressed with the clarity of the image! Again - you must demand the absolute best star diagonal there is - in order to decide for our hard-silver BBHS-star-diagonals.
So the Baader 2 "BBHS Mirror Diagonal with 2" ClickLock Clamp (BBHS = broadband hard silver coating with dielectric protective coating over) now is featuring this lift into the silver category. The black housing now is upgraded with a 2 "Clicklock-clamp and the all-new protected hard-silver is being Applied Onto the Sitall glasss-ceramic mirror. This combination reflects the full spectrum between 400 and 2000 nm without any light loss. If you really want the best product and or want to work in the infrared passband, choose this star diagonal.