Manufacturer: Baader .. Adapter
Product number: BA2458270

EUR 48,00


incl. 19 % VAT (DE)  
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excl. 6.95 € shipping costs (DE)  
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  • Details..
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Baader Counter Ring for 2" SC thread (#2458270)
With this ring, you can attach star diagonals or similar accessories directly to the back end thread of your SC telescope without needing the 2" barrel thus saving ca. 50 mm length.

Where is this counter ring useful?
In all cases where there is limited space behind the OTA and you want to use 2" accessories. A good example are fork-mounted SC telescopes. With standard adaptions it is not always possible to swing the OTA trough the mount without hitting the fork base.

Picture on the left:
With the SC counter ring, you can establish an extremely short adaption. The star diagonal remains on the telescope - even while transport. The OTA can be swung through.

Adaption:
screw off the 1.25" visual back
screw the SC counter ring on
unscrew the SC barrel from your 2" diagonal
screw the housing of your star diagonal on the OTA´s SC thread and lock it with the counter ring.
2-4 thread turns are enough


Which star diagonals can I use?
Not every mirror has the necessary SC thread in its housing. For example, the Baader 2" and the Orion US diagonal mirrors can be used. If you are not sure concerning your mirror, please feel free to contact us.
Internal connection (telescope side):Thread, 2" (50.8 mm)
Internal connection (ocular/camera side):Thread, 2" (50.8 mm)
Adaptable:Celestron SCs 8"/9.25"/11"/14"
Inner diameter / clear aperture (mm):50
Outer diameter (mm):97
Optical path (mm):5
Weight (kg):0.039
Locking ring



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Reviews

Written by Steffen Wetzel
on 2020-01-19

"Sehr zu empfehlende Kontermutter, wenn das Gewinde zu lang ist. Einfache Handhabung durch handlichen Außendurchmesser."