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I purchased the Hyperion Zoom and the MPCC Mark III. Can you tell me how to adapt the eyepiece to the coma corrector?
I also want to use other eyepieces. How do I know the right distance between fieldstop position and the MPCC?
I also want to use other eyepieces. How do I know the right distance between fieldstop position and the MPCC?
Question by: Vincent F. on Oct 7, 2016 1:08:00 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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Perfect coma correction with Baader-MPCC – but how to adapt eyepieces?
We received the following question and found it important to write an extensive answer for other customers. QUESTION: I purchased the Hyperion Zoom and the MPCC Mark III. Can you tell me how to adapt the eyepiece to the coma corrector? I also want to use other eyepieces. How do I know the right distance between fieldstop position and the MPCC? ANSWER: It is easy to produce an adjustable 1¼" eyepiece adapter for the Baader-MPCC coma corrector, offering a variable optical length from 49 to 64 mm, by using the following two parts: Baader focusing eyepiece clamp 1¼"/T-2 (item no. 2458125 / # 8a) Baader VariLock 20-29 mm T-2/T-2 adapter (item no. 2956929 / # 25Y) Combining these parts on top of the MPCC T-2-thread and rotating both adapters into the shortest optical length will provide an optical distance of 49 mm for an fully inserted eyepiece with 1¼" barrel. The MPCC is designer for a distance of 55mm to camera sensor or fieldstop. That means, the fieldstop inside an eyepiece could be placed up to 6 mm above the (upper) end of the 1¼" eyepiece barrel, in order to adjust for the 55 mm optical distance of the MPCC, which...
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Additional Information
| Manufacturer | Baader Planetarium |
|---|---|
| SKU (#) | 2956929 |
| EAN Code | 4047825022417 |
| Net weight (kg) | 0.07 |
| Optical length (mm) | 20 – 29 |
| T-2 Part # | 25V |
| Usage | to set precise focus distance |
| Screw Type | 6x M1,3 Allen wrench screws |
| Inner Diameter / Clear Aperture (mm) | mit okularseitigem T-2 Gewindeeinsatz = 38mm mit okularseitiger 52mm Ringschwalbe = 41mm |
| Outer Diameter | 50,8 (2") |
| Inner Connection (lens sided) | Thread, T-2 (M42 x 0,75) |
| Outer Connection (eyepiece/-camera-sided) | Thread, Dovetail ring, T-2 (M42 x 0,75) |
| Compatible Brands | Astro T-2, Baader Planetarium |
| Type of Adapter | Extension |
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