#2956220 SC-Clicklock (for 6", 8", 9¼") or #2956233 SCL-ClickLock (11", 14")
#2956100 Baader 2" ClickLock Diagonal Mirror or #2456115 Baader 2" BBHS ® Mirror Diagonal with 2" ClickLock Clamp
optional: #2956214 Baader 2" to 1¼" ClickLock Reducer (T-2 part #15B) (all Hyperion an Morpheus eyepieces can be used with the 2" barrel; this reducer is only necessary for 1,25" eyepieces)
Especially if your telescope is mounted on an Alt-Az mount, you can use the Baader 2" NexStar locking ring #245827 instead ot the SC-ClickLock to permanently mount the mirror at the back of the telescope - if you remove the nosepiece from our star diagonals, you get an SC-thread which fits directly at the telescope. This way, so can save some space and do not risk that the telescope hits the base of the mount when you point it high at the sky.
We do regard the mirror substrate of our dielectric diagonals a proprietory information. As you may have heard, a dielectric coating with as much as 50 coating layers can extend an enormous amount of stress onto the mirror substrate. Many proudly offered dielectric mirrors suffer under "power" - means the surface bends under the coating stress and over time develops a very weak spherical shape. For this reason we use a hardened variety of borosilicate glass, which can sustain the plane polished surface to remain in perfect order. Admittedly this substrate has somewhat larger index of expansion and does take longer to regain its optical shape when subjected to large temperature differences - but only when compared to our BBHS mirror-diagonals which feature a hard-silver coated glass-ceramics (Astro-Sitall) as substrate.
However - we had extensively tested this combo of coating and substrate to be a perfect match for our dielectric diagonals - especially ensuring a longlived product that does not change in optical quality over time. Please read more about the mechanical and optical properties of our BBHS-diagonals, as well as our marketing philosophy, to not participate in the usual number competition here: http://www.baader-planetarium.com/en/blog/baader-bbhs-reflective-properties/
Also we recommend to check out this Youtube Review: https://youtu.be/oYoymtIT0ww
We highly advise against visual calcium observations of the sun - the 397nm of Calcium are already ultraviolet radiation, and UV-radiation can cause phototoxic reactions which can harm your eyes. In addition, even young people can't see these wavelengths very good, and sensitivity decreases with the age. Because of this, the eye doesn't feel if the intensity is much too high. If you now try to increase the amount of radiation (e.g. with another mirror) to achieve a brighter image, you will increase the risk for eye damage. According to the newest norms for eye safety and to ophtalmologist conclusions, the sun must not be observed visualy at 397nm.
We highly advise to only observe the sun in calcium photographically, then you also do not need a star diagonal. We can't understand why some manufacturers promote these calcium-filters for visual observations.
We also advise against placing a filter so close to the focus - any energy rejection filter belongs in front of the front lens, even if this sets high demands to the quality of such a large filter. Placing the filter close to the focus will save money, because you can use a much smaller filter, be we absolutely can't recommend it - because of our own conscience as well as because of EU-regulations. The filter would receive all the energy collected by the front lens. We can only recommend putting the energy rejection in front of the front lens, which is the ethically and technically correct method.
To adjust the orientation of the star diagonal, you need
NexStar Locking Ring 2"
This acts as a counter nut and gives you good grip, so that you can easily open/tighten it.
- Using #2956220 Clicklock-SC
- Directly attaching the diagonal to the telescope using #245827 SCT lockring?
from the star diagonal body. Because of the mirror locl knobs there is no other way to mount it, also the panning is limitted by the mirror lock
knobs and/or the focus wheel.
When using a regular SC-ClickLock 2956220 and the star diagonal as it is you´re better according the back focus length of the EdgeHD.
Baader 2" ClickLock®-Zenitspiegel
- Oversized 2" dielectric 1/10 wave mirror
- Scratch resistant hard coated mirror surface for safe cleaning, to remain scratch free even if subjected to harsh environment
- Mirror rejects deep UV and IR radiation, safe for solar viewing with all White-Light and H-alpha solar filters
- Mirror housing equipped with S58 dovetail and female M55/2" SC-threads on both sides
- Baader 2" ClickLock clamp for ultrafast clamping action
- Clamps heavy accessories effortless, with fingertip action
- Removable 2" Safety Kerf nosepiece, both ends include M48 filter threads, featuring largest clear aperture for widefield application
|Optical Design||Mirror Diagonal|
|Inner Connection (lens sided)||Thread, M48, 2" (50,8mm)|
|Outer Connection (lens sided)||Barrel, 2" (50,8mm)|
|Inner Connection (eyepiece/-camera-sided)||Clamp, 2" (50,8mm)|
|Reflection surface||Dielectrically coated|
|Image Orientation||Erect image, Mirror inverted|
|Optical length (mm)||112|
|Inner Diameter / Clear Aperture (mm)||46,6|