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I would like to experiment ep projection with my Morpheus eps and an APS-C Mirrorless camera with T2 adapter mounted on the camera flange. Is the recommended extension tube still 30mm, even if the Mirrorless camera backfocus is 17,7mm instead of the 44-46,5mm of a typical DSLR? Or is it lower (15mm, even less?) I am wondering if I should buy just the M43-T2 adapter or also the extension tube. And a 7.5mm M43 extension is already provided with Morpheus EPs
Question by: Matteo G on Nov 30, 2020 4:37:00 PM | 1 Answer(s)
I am trying out eyepiece projection photography using Hyperion Universal Zoom Mark IV together with
Televue 60mm ApoTelescope and
Canon 800D/EOS Rebel T7i (US) with 1.61 Crop factor (APS-C ).
What is the extension tube length that I should be using ?
(I tried with 30mm extension but still cannot get anything on the camera sensor; Been trying out at focal length of 8-24mm on the eyepieces but still nothing. ) . Am not using any star diagonal in between. Any advice?
Televue 60mm ApoTelescope and
Canon 800D/EOS Rebel T7i (US) with 1.61 Crop factor (APS-C ).
What is the extension tube length that I should be using ?
(I tried with 30mm extension but still cannot get anything on the camera sensor; Been trying out at focal length of 8-24mm on the eyepieces but still nothing. ) . Am not using any star diagonal in between. Any advice?
Question by: Alan Guai on Nov 25, 2020 1:34:00 PM | 1 Answer(s)
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The Baader Astro T-2 System™
For over 30 years we have focused on the Astro T-2 thread system (M 42 x 0.75 mm); virtually every telescope manufacturer must offer this thread far ahead of the focal point of his instrument, such a universal T-ring (for DSLR cameras) can be connected. The only exceptions are (still) Russian equipment, there the thread diameter is the same, but the pitch is still 1mm per revolution - rather than 0.75mm! Therefore, we offer among other things a "Russians adapter". At only 7mm additional optical length it can allow so many Russian lenses or telescopes to be compatible with an international Astro T-2 (M 42 x 0.75mm) connector! For the sake of better recognition mostly are marked. See marking small 'a' or small 'i' in the respective indication! "a"; identifies an external thread (male); or, if Ø sign which a diameter, "i"; - a female is always (female) or - Ø character - an inner diameter. The Optical Length The optical length describes the extension of the optical path caused by an adapter or accessory when inserted into the beam path of the telescope. The values listed in the system table rounded to 1/2 mm. For pure threaded adapters...
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Additional Information
| Manufacturer | Baader Planetarium |
|---|---|
| SKU (#) | 1508154 |
| EAN Code | 4047825016218 |
| Net weight (kg) | 0.02 |
| Optical length (mm) | 15 |
| T-2 Part # | 25A |
| Usage | for eyepiece projection with sliding focuser |
| Inner Diameter / Clear Aperture (mm) | 38 |
| Outer Diameter | 46 |
| Inner Connection (lens sided) | Thread, T-2 (M42 x 0,75) |
| Outer Connection (eyepiece/-camera-sided) | Thread, T-2 (M42 x 0,75) |
| Compatible Brands | Astro T-2, Baader Planetarium |
| Type of Adapter | Extension |
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