Baader Wide-T-Ring Sony Alpha and Minolta Maxxum with D52i to T-2 and S52

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Baader Wide-T-Ring Sony Alpha and Minolta Maxxum with D52i to T-2 and S52

# 2408334

€ 27.29 Price excl. German VAT tax (16%): € 23.53

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Baader Wide-T-Ring to connect Minolta DSLR cameras on the Astro T-2 system
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.
Furthermore, the illumination of the camera chips improved significantly, mainly because of the larger clear aperture.
On the camera side: Minolta AF Bayonet
Telescope side: S52 dovetail clamp incl. S52/T-2 internal thread with 0.75mm pitch

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Product Questions

I own a sony alpha 900 full frame camera. I have got a normal T2 adapter with a 2" out, and I have noticed some vignetting. I Wonder if using this "Wide versión" would eliminate the vignetting.
Would I need a different T2 to 2" adapter?
Also I am going to use a mpcc III coma corrector. Will I need something else to avoid vignetting as well with the corrector?

Question by: Juan Gonzalez on May 28, 2020 11:42:00 PM | 1 Answer(s)

Please check the manual of your camera – Sony uses two different bayonets; if you camera uses the E-bayonet, you need this T-ring:
Baader Wide-T-Ring Sony E/NEX Bayonet with D52i/M48 to T-2 und S52 # 2408317

On its product side, you can see the difference between T-2 and M48:
https://www.baader-planetarium.com/en/accessories/adapters-imaging-accessories/camera-adapters/t-rings-wide-and-classic/baader-t-ring-sony-enex-bayonet-with-d52m48-to-t-2.html

Due to mechanical limitations, on some cameras, the free aperture is still limited to 41mm, while e.g. Canon uses a wider bayonet and offers up to 48mm of free aperture. To maximise the free diameter, you need another 2" nosepiece: 2" / S52 Nosepiece # 2958551

So, a wide T-ring will remove vignetting as much as possible, but on some camera brands the camera bayonet is the bottleneck, not the T-2-thread. Please check the free aperture of your camera and the corresponding Wide-T-ring for further details.

Please also check the complete optical length – the Wide-T-rings do not all provide the standard T-2-flange distance of 55mm, so you may need some spacers. (This was done to make them work with configurations where you need to fight for every millimeter.) You can see the differences by comparing their optical length to that of the standadr T-ring, the data is given in the technical data of each T-ring.

Answer by: Baader Web Team (Admin) on May 29, 2020 10:31:00 AM

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Specifications

Additional Information

Manufacturer	Baader Planetarium
SKU (#)	2408334
EAN Code	4047825040794
Weight (kg)	0.052
Optical length (mm)	8,3
Usage	to connect (D)SLR cameras to the Astro T-2 thread system
Camera Adaptable	Minolta AF
Inner Diameter / Clear Aperture (mm)	41 (T-2) / 44,7
Outer Diameter	63
Inner Connection (lens sided)	S52, T-2 (M42 x 0,75)
Outer Connection (eyepiece/-camera-sided)	Bayonet
Compatible Brands	Astro T-2, Baader Planetarium, Other
Type of Adapter	Camera Adapter

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