Home/Accessories/Imaging Accessories/Camera Adapters (T-Rings)/Wide-T-Ring Canon-R with D52 to T-2i

All Baader Wide-T-rings have an S52 dovetail in addition to the inserted T-2 ring. This allows the T-ring to be modified to an M48 female thread using the S52 / M48 adapter #2958552, or to use the S52 barrel #2958551 without the T-2 reduction. With the S52 / M68 adapter # 2458252, the Wide-T-Ring can be directly attached to an M68 male thread to securely fasten your camera to the widest possible aperture.

All Baader Wide T-rings can be directly adapted to an UFC (Universal Filter Changer) with the optional Baader UFC S52 dovetail camera-adapter (#2459119), in order to change different filter sizes directly in front of the camera sensor.

The illumination of the camera chips improved significantly, mainly because of the larger clear aperture.

Wide-T-Ring Canon-R with D52 to T-2i

Product Details

SKU
2408336
EAN Code
4047825041036
Manufacturer
Baader Planetarium

Ports & Compatibility

Camera Adaptable
Canon R Bajonett
Compatible Brands
Astro T-2
Baader Planetarium
Inner Connection (lens sided)
M42 x 0.75 (T-2)
S52

Dimensions & Weight

Inner Diameter / Clear Aperture (mm)
41mm (T-2) / 48,3mm
Net weight (kg)
0.05
Outer Diameter
66.5mm

Optical & Usage Specifications

Optical length (mm)
8,3
Type of Adapter
Camera Adapter

Customer Reviews

4.5

reviews

Tell us what you think about this item!

Top customer reviews

Michi

2021-03-16 20:38:14

Rating

Gute Qualität

Macht einen sehr guten Eindruck, sieht wertig und solide aus. Passt sehr gut ans EOS R Bajonett, kein Spiel und sitzt satt. Aber : Warum ist dieser Ring nur 8,3mm lang ? Auflagemaß der Canon R sind 20mm + 8,3mm T-Ring + 25mm 2" / S52 Steckhülse ergibt 53,3mm Abstand. Gefordert ist normalerweise ein Abstand von 55mm vom M48 Gewinde eines Korrektors bis zum Chip. Dafür muss ich leider ein Stern abziehen.

Response from Baader Planetarium

Danke für Ihre Bewertung. Generell ist zu sagen, dass wir die Wide-T-Ringe alle so kurzbauend wie irgend möglich gemacht haben, da es immer weniger Systeme gibt die auf dem alten 55 mm Standard aufbauen. Der 55 mm Abstand stammt aus der Zeit der Tamron T-2 Objektive, die damit und mit den passenden T-Ringen universell an alle Kameraformate adaptierbar waren. Heutzutage ist das Format nicht mehr zeitgemäß weil es zu lange aufbaut, T-2 Objektive haben die wenigsten noch. In aller Regel werden sogar noch kürzere Adaptionen gefragt. Daher haben wir die T-Ringe so weit und kurz wie möglich gemacht, damit danach alle weiteren Möglichkeiten, betreffend einer Adaption, offen bleiben. Insbesonders z.B. in Kombination mit unseren diversen neuen M48 Zwischenringen und (Fein)Abstimmringen.

Josef

2020-06-09 17:44:03

Rating

Wide T Ring

Hohe Qualität Produkt hat sofort gepasst.

I have Celestron C9.25 and Canon R8 which i I want to use for imaging DSOs. I'm also planning to purchase f/6.3 focal reducer. I'm confused with all the options but I realize camera sensor needs to be 105 mm away from the visual back of the telescope (or from focal reducer). Can you please recommend me all the parts I need to achieve a good focus with minimal vignetting in the final image? Thank you!

Ive / February 21, 20251 Answer

Your Canon R8 has a back focus of 20mm, including the wide T-ring you will therefore have a distance of 28.3mm from the D52 thread of the T-ring. The Celestron f/6.3 reducer requires a distance of 105mm from the 2” internal thread, which should be maintained as closely as possible.

For the adaptation of 2"/M48 extensions you need our S52i to M48i adapter: https://www.baader-planetarium.com/en/adapter-s52a-to-m48i.html (this is only an inverter ring, so the distance from the M48i thread remains unchanged at 76.7mm).

From here you can cover the missing 76.7mm with various 2” extension rings:
- #2958640 40mm Extension Tube
- #2958630 30mm Extension Tube
- #2958605 5mm Extension Tube
- #2457918 1mm Fine-Adjustment Ring
- #2958555 M48a Inverter Ring (0,8mm)

Alternatively, you also have the option of replacing the 30mm Extension Tube with our #2958593 M48 Heavy-Duty Quick Change System and an additional 15mm Extension Tube (#2958615). This has the advantage that you can change the camera at any time and adjust the rotation according to your needs.

However, it should also be noted that the f/6.3 reducer provides an image circle that usually covers sensors up to about APS-C format (i.e. about 22 × 15 mm, with a diagonal of about 27 mm). With much larger sensors - such as full-frame systems - vignetting usually occurs because the image circle provided by the lens is not large enough. You should therefore expect vignetting and an image that is not fully corrected in the corners.
Baader Web Team / February 24, 2025
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Jorn / February 3, 20251 Answer

The Takahashi FC-100DF is a Flourit Doublet, so you need an additional corrector such as the FC/FS MFL1.04X field corrector for photographic use. From the field corrector you have an available backfocus of 71.2 mm, the field corrector ends at M52x0.75 male, so you need an additional Takahashi M52x0.75 to M48x0.75 adapter to adapt the camera using the M48 system (for example the Lacerta for Takahashi: M52nM48p).

From the M48 adapter you have 69mm available, which you can fill with various extension tubes and our Wide-T-Ring Canon-R with D52 to T-2i. Our Wide-T-Ring Canon-R requires an additional S52a to M48i adapter (https://www.baader-planetarium.com/en/adapter-s52a-to-m48i.html) to be able to connect the M48 system directly. From the M48i adapter onwards, you now have the option of covering the missing required backfocus with our M48 extension tubes (https://www.baader-planetarium.com/en/m48-extension-tubes-5-7-5-10-15-30-40-mm.html) and, if required, the M48 fine tuning rings (https://www.baader-planetarium.com/en/m48-fine-adjustment-rings-0-3-0-5-1-mm-aluminium.html).
Baader Web Team / February 3, 2025
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You have a lot of documentation on how using this with an eyepiece but none that I can found if I want to directly connect my camera to the eyepiece holder without going through the eyepiece itself. * In this case is there a minimal extension distance to respect between the camera and the (empty) eyepiece holder? (with eyepiece for full frame hybrid you say 95mm) * What is the impact of the extension distance on the magnification? (with eyepiece equivalent focal length is Feq=Ftel*(d/Feye-1) Danke!

Christophe / May 4, 20241 Answer

Adaptation to the eyepiece is pretty straight-forward: To use the maximum aperture, remove the T-thread from the T-ring and insert 2" / S52 Nosepiece # 2958551. Then you can insert it into your eyepiece holder, just like an eyepiece. You can also use the T-thread of the adapter and use Baader 2" / T-2 (M48) nosepiece with Safety Kerfs # 2458130 or Baader 1¼" T-2 nosepiece with Safety Kerfs # 2458106, if your telescope hasn't got a T-thread (M42x0.75) on its own (some telescope have got one integrated). This is fine for cameras up to APS-C (or MFT, if you want to use the 1¼" nose piece). For a full frame camera, T-2 can cause vignetting, and you should use the S52 / M48 adapter #2958552 plus Baader M48 extension tube 40 mm / 2" nosepiece with Safety Kerfs #2958640 as adapter to the 2" eyepiece clamp. This way, you can use the full aperture. The distance between camera and sensor doesn't change the focal length, as you are using the native focal length of your telescope. So, on a telescope with a focal length of 1000mm, the camera sensor has to be placed 1000 mm behind the objective. Only then you'll see a sharp image. Caution: If you are using a star diagonal, you should remove it for photography. A 2" star diagonal is approximately 10-11 cm long, so you may need a mechanical extension to reach focus without it, if the focuser doesn't extend enough. We have extension tubes for T-2 (e.g. Baader T-2 / 40 mm Extension Tube # 1508153); for M48, you can stack e.g. some M48 extension tube 40 mm / 2" nosepieces #2958640. The backfocus of your telescope or the camera adaptation in general should be mentioned in the manual of our telescope. If you can insert an eyepiece without a star diagonal into your focuser and see a sharp image, you probably don't need an additional extension.
Baader Web Team / May 6, 2024
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Sean / November 17, 20221 Answer

Sorry, we can't give you backfocus information without knowing all the details (e.g. your telescope). Furthermore we only do that for our own products, not if other brands like Optolong are included. A good guideline however is our Digiscoping Brochure: https://www.baader-planetarium.com/en/downloads/dl/file/id/444/product/0/digiscoping_camera_adaptations_for_afocal_photography_and_eyepiece_projection.pdf
Baader Web Team / November 17, 2022
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I have Canon EOS R5 full frame mirrorless camera (RF-mount’s flange focal distance is 20mm) and I am going to buy Celestron Nexstar 8SE Telescope. My goal is to get good photographs from planets, moon and maybe deep sky objects too. I know, that I need high quality optical elements between the telescope and the camera to achieve the goal. I am going to buy Baader 2" BBHS ® Prism Star Diagonal Prism with 2" ClickLock Clamp, Baader Hyperion Universal Zoom Mark IV, 8-24 mm eyepiece (1¼" / 2"), 9 mm and 17.5 mm Morpheus® 76° widefield eyepiece. VIP 2x modular barlow lens is also in my list. What kind of adapters, extensiontubes and other finetuning products do I need to attach my camera to eyepieces? I think I need a new Baader Wide-T-Ring Canon R but what else to get good astrophotographs?

Harri Ylinen / February 9, 20211 Answer

With a modern camera with small pixels and a Schmidt-Cassegrain at f/10, a barlow lens like the 2x VIP is usually sufficient, especially if you boost it with some T-2-extensions as described in this PDF: https://www.baader-planetarium.com/en/downloads/dl/file/id/240/product/1062/calculating_different_magnifications_with_the_vip_barlow.pdf This way, you can match the f/ratio to the resolution of your camera. We have described the adaptation of a camera to an eyepiece in this PDF: https://www.baader-planetarium.com/en/downloads/dl/file/id/444/product/1210/digiscoping_camera_adaptations_for_afocal_photography_and_eyepiece_projection.pdf This will result in much higher magnifications than a barlow lens, so with a f/10-telescope, the barlow lens is usually the better choice (with modern cameras). On page 5 of this PDF, you can find a formula to calculate the best magnification depending on the pixel size of your camera. For photographing the planets, we recommend a dedicated video module like the QHY planetary cameras https://www.baader-planetarium.com/en/cameras/qhyccd-kameras/planetary-and-guiding-cameras.html or the Celestron NexImage. The large sensor of a DSLR is not helpful when taking images of the planets. It is fine for taking images of the complete moon or the (with an appropriate solar filter in front of the telescope) the sun. To attach your camera directly, you can use Baader SC / HD Ultra Short T-Adaptor, 7mm optical length # 2958500B (which limits you to the smaller diameter of the T-2-system) or you upgrade your telescope with a 2" eyepiece clamp like Baader 2" ClickLock SC/HD (2") clamp (C5" - C9¼") #2956220 and couple the wide T-ring with 2" / S52 Nosepiece # 2958551. For Deep-Sky-photography, you should use an equatorial mount like an AVX - you could also purchase the wedge for the NexStar SE, but the AVX is a much better solution if you want to take photos. It is much sturdier and not that much more expensive than a SE plus wedge.
Baader Web Team / February 10, 2021
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Bryan F / July 9, 20201 Answer

Ok, the optical length (or back focus) of the camera is 20mm so we have 35mm left for the adapters. From flattener to camera you´ll need following parts: https://www.baader-planetarium.com/en/m48-fine-adjustment-rings-(03--05--1-mm)---aluminium.html 1mm https://www.baader-planetarium.com/en/m48-fine-adjustment-rings-(03--05--1-mm)---aluminium.html 0,3mm https://www.baader-planetarium.com/en/baader-ufc-s70--t-2-adapter-t-2-(f)-telescope-sided.html 1mm https://www.baader-planetarium.com/en/baader-ufc-s705-extension-5mm-with-s70-dovetail--dovetail-clamp-screws.html 2pc=10mm https://www.baader-planetarium.com/en/baader-ufc-base-(filter-chamber)-telescope-sided-s70-dovetail-receptor.html 13mm https://www.baader-planetarium.com/en/baader-ufc-s52-dovetail-camera-adapter-(eos--sony).html 2mm https://www.baader-planetarium.com/en/baader-wide-t-ring-canon-eos-with-d52i-to-t-2-and-s52-4289.html 8,3mm This is in summary 35,6mm because filters lay out the focus to extra focal caused by refraction through the filter. Rule of thumb is a third of thickness of filter according to 2mm thick filter is roughly 0,6mm.
Baader Web Team / July 9, 2020
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Wide-T-Ring Canon-R with D52 to T-2i

Wide-T-Ring Canon-R with D52 to T-2i

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