Product Questions and Answers
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or also as traditional nosepiece with undercut (included with previous versions):
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/
I want to use a petzval refractor for H-alpha solar observing with a dedicated solar filter. It is in general recommended not to use an UV/IR cut filter before the diagonal, since UV/IR reflections can come to focus in the petzval rear glass elements and harm the scope. If it rejects UV/IR by passing UV/IR into the diagonal housing, this is a big sales argument for the dielectric mirror when using a petzval scope.
Obviously SkyWatcher is aware of this problem, the tube of the newer models are 10mm shorter.
Okay, about our star diagonal you can find here more information according the lengthes:
Maybe you can turn in the focuser fully and picture the moon on a white sheet of paper (without eye piece/ star diagonal) so you´re able to
measure the distance with a ruler to find out the back focus length.
The ring has got a filter thread and is 12mm long, so either our 6 LPFC or 8mm filters will work.
The other options would be inserting the filter into the 2"/1.25" reducer for your 1.25" eyepieces, or using either #2956237 37mm ClickLock extension or #2956247 47mm ClickLock extension
#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.
diagonal and the eye piece separately in hand and see the eye piece over the mirror coming close when putting it in.
Also we recommend to check out this Youtube Review: https://youtu.be/oYoymtIT0ww
- 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.
The SC-thread should be easily accessible by unscrewing the nosepiece. Then you should have this part in your hands: https://www.baader-planetarium.com/en/accessories/adapters-imaging-accessories/2-inch-sc-thread/baader-2%22-safety-kerf-nosepiece-with-2%22-filter-thread.html
There are sometimes slight tolerances in the threads, so that they might not fit perfectly. Please take a look at the thread of the telescope, if there is some dirt or black colour which might block the thread. You can also try to turn the star diagonal around by removing the ClickLock as described in the manual https://www.baader-planetarium.com/en/downloads/dl/file/id/1378/product/1687/user_manual_for_baader_clicklock_diagonal_mirror_with_2_and_m68_connection.pdf on page 7.The thread is the same on both seides, but maybe one side works better.
I can't seem to find the S58 dovetail replacement on your website. is there an alternative or upgraded version of this?
Or are you talking about Baader M55a/M68a Adapter for all 2" Baader mirrors and prisms # 2956110?
You need to remove the 1,25" barrel from the Hyperion Zoom and screw the barlow directly on
If you want to replace the 2" nosepiece that you've lost, you can do that with our 2" Safety-Kerf nosepiece #2408156:
Would either of these adapters work for this purpose? Or would you recommend another?
1. This Baader adapter: https://www.baader-planetarium.com/en/2%22a--m48i-zero-length-reducing-piece-(no-optical-height).html
Thanks for your help.
Although the S58 adapter is normally not sold individually, that would also be an option if everything else fails.
on the focuser that you may can unscrew this and replace it with a 2" ClickLock EP holder. We don´t sell Meade telescope so please try to
contact a Meade dealer who can tell you what thread it is. If its possible to screw in a ClickLock then you´re able to use the 2" Diagonal.
Please see following link to all of our ClickLock you may find one that matches:
However, I want to use the ClickLock adapter elsewhere in my setup but will need the 2" SCT adapter (2"/S58) provided with the ClickLock SC/HD (2") clamp (C5" - C9¼") #2956220.
I don't want the M55/2"/S58 ring that comes twice with this diagonal but the 2"/S58 ring (without M55 threads) that comes with ClickLock SC/HD (2") #2956220.
More information on our prisms and mirrors can be found here: https://www.baader-planetarium.com/en/downloads/dl/file/id/1617/product/1687/baader_star_diagonals_t_2_and_2.pdf
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.
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
|Net weight (kg)||0.48|
|Optical Design||Mirror Diagonal|
|Inner Connection (lens sided)||M48, 2"/SCT Thread (50.8mm)|
|Outer Connection (lens sided)||ø 2" (50.8mm)|
|Inner Connection (eyepiece/-camera-sided)||ø 2" (50.8mm)|
|Reflection surface||Dielectrically coated|
|Image Orientation||Erect image, Mirror inverted|
|Optical length (mm)||112|
|Inner Diameter / Clear Aperture (mm)||46,6|