TS-Optics Optics Adapter for Canon EOS Lenses to T2 for astro cameras - with 1/4" photo thread

Use your high-quality Canon EOS lens for ultimative wide-fieled images of he starry sky with your astro camera

For the popular Canon EOS cameras, there is a wide range of very good lenses available. What is more obvious than using these lenses also for astrophotography with high resolution astro cameras. This adapter establishes the connection from your astro camera to the lens and also connects to a photo tripod or accessory clamp.


The capabilities and advantages of the combination of EOS lens and astro camera

With cooled astro cameras, significantly deeper images of the sky are possible than with uncooled DSLR cameras.

Resolution and especially depth of the images from astro cameras are higher, Objects do not wear out so fast, the images generally appear more plastic.

Totally different sections of the sky can be imaged than with photographing through the telescope. Nebulae, clusters and even galaxies can be presented totally new and with high quality. Like the image of the North America Nebula at left.

With an autoguider, your EOS lens can even be used as compact guiding scope - perfect for astro air trips where every gramm counts.

The TS Canon EOS Adapter is suitable for these lenses:

All Canon EOS lenses for full format or APS-C format and also lenses from third-party suppliers like Sigma, as far as they are designed for Canon EOS cameras.


The EOS lens adapter is suitable for these astro and CMOS cameras:

Due to the short optical length of only 19 mm, you can adapt almost all astro cameras, video cameras with C-mount, cameras from The Imaging Source and cameras from many other suppliers.

As most cameras have only little distance between thread and chip, you might possibly need T2 extension tubes for acieving the correct distance between lens and camera. Beside the extension tubes, we also offer conversion adapters to other connections like C-mount or 1.25".

Video cameras and planetary cameras can also be used.

Suitable adapters (T2 to C-mount or T2 to 1.25" barrel) are linked as "recommended accessories".

Use of filters

Inside of the T2-thread, there is a M37 thread. If needed and a camera is used with a sensor which is not too large, an adapter with a M28.5 thread can be inserted here. Then you can use the whole range of filters with 1.25" mount. The filter insert is included.

Mounting on a tripod or piggyback adapter

Many astro cameras don´t have a connector for photo tripods. This EOS adapter solves the problem. At its base, the adapter has one 1/4" photo thread and three M5 threads. With these threads, the adapter can be mounted trouble-free to photo tripods, ball heads, dovetail bars and accessory clamps.

Adaptation example for an astro camera with 17.5mm backfocus and T2 connection:

Most astro cameras have a backfocus of 17.5mm. This is the distance from the T2 thread to the sensor. The following is important for the adaptation:

Working distance (backfocus) of the Canon EF lens: 44 mm

Effective length of the TS10838 adapter: 19 mm

backfocus of the astro camera: 17.5 mm

If you subtract the 19 mm and 17.5 mm from the 44 mm, 7.5 mm remain to be covered. We offer 2 options here:

BA1508155 - T2 extension ring with 7.5 mm

or

TST2ROT (5.5 mm) and 2x T2Abstimmring1 (2 mm) - this even gives you a quick coupling and rotation for selecting the required image angle.

The matching items are linked in the accessories section.

Example of use - adaption of a astro camera to a Canon EOS lens.

The distance from the EOS lens to the focus is 44 mm. That is the flange focal distance of the objective and the same for every EOS lens.

The TS EOS adapter has an optical path of 19 mm, so there are 25 mm left for the astro camera and the adapter. Needless to say that the astro camera which is used must not have a longer distance from connecting thread to sensor than 25 mm.

Example of use - adaption of an ATIK 383 astro camera - flange focal distance 17.5 mm

The ATIK camera has a working distance of 17.5 mm and a T2 connection, so we have to bridge 7.5 mm for reaching the optimal distance. This is simple, we just need a T2 extension tube with 7.5 mm length - this is available from Baader - item number BA1508155.

Example of use - adaption of an Astrolumina ALCCD 8L astro camera - flange focal distance 22 mm

Here, it is relatively easy, too. 25 mm available distance minus 22 mm for the ALCCD 8L result in 3 mm. With the TS adapter TST2V3, we offer a matching distance ring, too.

Why is it so easy to achieve an adaption?

The answer is obvious, we use the T2 thread. This thread is a stadard thread in astronomy and photography. Teleskop Service offers one of the most comprehensive T2 ranges , so you can make a connection to millimetre accuracy. All suitable adapters are linked in the "recommended products" section.