2"a / M44i x 1 Zero-length reducing piece (zero optical length)

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2"a / M44i x 1 Zero-length reducing piece (zero optical length)

# 2454835

€ 27.00 Price excl. German VAT tax (19%): € 22.69

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converts any 2" (SC) female thread into a M44 x 1 female thread - without extending the optical length
manufactured to adapt our Hyperion Universal Zoom Mark IV onto most spotting scopes (see animation on the right)
Note: for fitting the optical nose of the Zoom into the receptor at some spotting scopes, the thin dust cover ring needs to be removed - see images
suitable for adaptation to Leica spotting scope with male M44 x 1 connection thread. Also suitable for all M44x1 threads according to the old Zeiss (Jena) standard.
Adapter with continuous 2" male and M44 x 1 female thread as well as two face holes (recommended mounting accessory: adjustable pin-type face wrench #2450062)

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Product Questions

I'm trying to figure out if this could work with a leica APO 82 televid (there is a male thread when y=the original eyepiece is removed, I mesure 44mm as outer diametre.
My goal is to use the televid close to its native focal length with a camera.
Any help appreciated

Question by: Jean-Philippe on Jan 4, 2021 1:44:00 PM | 1 Answer(s)

The ring does indeed fit the M44 male thread of the Leica Televid. But then, as a result, there is a 2" ("Celestron") thread with 24 turns/inch (pitch) on the Televid. Whether you could connect a camera to it and come into focus is not so easy to say. Surely our ultra-short SC-T adapter can be attached - and then 16mm above the Televid body sits a T-2 thread (M42x0.75 mm). But it is rather unlikely that such a focused image can be created in the camera.

The Leica eyepieces have a pre-mounted Barlow lens, which protrudes so far into the eyepiece socket of the Televid that the first eyepiece lens almost rests on the prism. Only then you can reach the focal point with the eyepiece at infinity setting. Our "Zero-Length" M44 ring is actually intended to be screwed into our Hyperion Zoom Mark IV instead of the 1 1/4" socket so that our zoom can be used on the Televid instead of a Leica eyepiece - because only in this way can our eyepiece with its front lenses reach as far into the Televid as the LEICA eyepieces.

With a camera, however, these lenses are missing, the image will not be able to be focused. You may be able to test if you can get into focus by bringing your intended camera to the televid at a distance of 16 mm and see if the image comes into focus, not just at 3M distanceuing but at infinity setting.

CONCLUSION: in our opinion, unfortunately, a camera connection without focal length-extending intermediate optics is impossible. Unfortunately, we do not offer and don´t know a source for such intermediate optics that would be suitable for this purpose.

Answer by: Baader Web Team (Admin) on Jan 8, 2021 10:04:00 AM

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Specifications

Additional Information

Manufacturer	Baader Planetarium
SKU (#)	2454835
Inner Diameter / Clear Aperture (mm)	43
Outer Diameter	50,8mm (2" SC)
Inner Connection (lens sided)	Thread, M44
Outer Connection (lens sided)	Thread, 2" (50,8mm)
Inner Connection (eyepiece/-camera-sided)	Thread, M44
Outer Connection (eyepiece/-camera-sided)	Thread, 2" (50,8mm)
Type of Adapter	Reducing piece

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2"a / M44i x 1 Zero-length reducing piece (zero optical length)

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2"a / M44i x 1 Zero-length reducing piece (zero optical length)

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