Astro T-2 System

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.

This will probably not work, because the diameters of the insets of T-rings are not standardized – the adapter ring will probably not fit into your existing T-ring.

Vignetting which is caused by the T-thread (M42x0.75) can be removed with a Wide-T-Ring, but it may also be caused by the camera bayonet, so please check if a wider T-ring will actually be of use, or if the camera is the problem.

Please also note that Sony uses two bayonets, one is compatible with Minolta and the other one is the E-bayonet.

Yes of course, many of our customer use this mirror not only for solar observation but also for deepsky.
More information on our prisms and mirrors can be found here: https://www.baader-planetarium.com/en/downloads/dl/file/id/1617/product/1687/baader_star_diagonals_t_2_and_2.pdf

We are sorry - this is another reminiscence concerning the origin of this product. This product was once meant to be used on a gun - and be adjusted one time.
Hence the set screws are "well hidden" and only accessible w. some effort. At this time we have not changed this part of the design and we do not have any replacement av. for this thread.
However - we are thankful for this piece of kind criticism and will try to address this with future productions - however - the next one is already in the makes.

If your corrector has got a male SC thread, it should fit without problems.
The "i" in UNFi stands for internal or female thread, and UNF is the thread standard. This thread may be better known as 2" SC-thread, as it is the standard thread used on the smaller Schmidt-Cassegrains.
If you need a male thread, there is also Baader 2"/2" Inverter Ring with 48mm filter thread # 1508020