Baader M48 extension tube 40 mm / 2" nosepiece with Safety Kerfs

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Baader M48 extension tube 40 mm / 2" nosepiece with Safety Kerfs

# 2958640

€ 32.00 Price excl. German VAT tax (19%): € 26.89

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  • Used to adjust the working distance of larger cameras and similar accessories with M48 thread
  • Telescope side M48 internal thread, 3.5 mm depth
  • Eyepiece-/camera side M48 external thread, 3 mm depth
  • 40 mm optical path length, high-quality Aluminum
  • Also used as M48 / 2" nose piece with 36mm insertion depth, safety kerfs and 4 mm optical height

Product Questions and Answers

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I've just upgraded my eyepieces/diagonal to 2" components and am finding it difficult get a focused image. Through trial and error it seems that if I just barely insert both the eyepiece and the diagonal nosepiece into their respective clicklocks then I'm able to focus the image; however this does not feel like the eyepieces are secure. This leads me to believe an extension tube may be required; is this component compatible with the Baader 2" Clicklock diagonal, and would it provide an extension versus the standard nosepiece that comes with the diagonal? It there a different piece I could install to extend the eyepiece side of the optical train instead of between the SCT and the diagonal? Thanks!

My setup, for reference:
Celestron Nexstar Evolution 8"
Baader 2" ClickLock Eyepiece Clamp for 2" SCT and Large SCT - CLSC-2
Baader 2" Clicklock Diagonal
Baader 2" Morpheus Eye pieces
Question by: Matt Sadler on Oct 12, 2022 4:42:00 PM | 1 Answer(s)

Rating of Question



Modern cameras are usually characterised by extremely short optical heights, in order to be able to be mounted on various telescope constructions. The old T-2 standard with 5 mm thread depth is a hindrance to this. To take care of this new development, all new Baader T-2 and M48 parts are delivered with the new 3 mm standard.


Additional Information

Manufacturer Baader Planetarium
SKU (#) 2958640
EAN Code 4047825042866
Net weight (kg) 0.05
Optical length (mm) 40 (or 4)
Clamping System no clamp
Usage Adjusting the distances of accessories with M48 thread, M48 / 2" Nosepiece
Inner Diameter / Clear Aperture (mm) 45 mm
Outer Diameter 53 mm
Outer Connection (eyepiece/-camera-sided) M48
Inner Connection (lens sided) ø 2" (50.8mm), M48
Compatible Brands Baader Planetarium
Type of Adapter Nosepiece, Extension
Adapters Family M48 System

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