TS-Optics Off Axis Guider TSOAG16 - stable - length 16 mm

TS Optics TSOAG16 stable short off-axis guider

The TSOAG16 is a development from Teleskop Service for all astrophotographers who have relatively little space between focuser and camera and use a heavy CCD camera or full-frame DSLR camera. The TSOAG16 offers convincing features.

The advantages and features of the TSOAG16:

Stable construction ... The body, for example, is made of solid, 11 mm thick aluminum - enough space for long threads for reliable clamping.

Short design ... With only 16 mm optical path from the M48 connecting thread to the camera adapter, the off-axis guider is usable with almost all correctors.

Easy focusing of the autoguider ... the lateral T2 connector can be adjusted as well, making possible to focus the autoguider without changing the distance from the main camera to the corrector.

Three possible positions from the camera to the prism ... due to the special design of the connecting adapters to T2, EOS or M48, three positions of the prism to the camera sensor are possible. This avoids shading by the prism, too.

Flexible adaption at the camera side ... in the accessories section, you can find the necessary connecting adapters to T2, M42, M48 and EOS. The adapters extend the length of the off-axis guider only 1 mm.

Connecting the TSOAG16 to the telescope or the corrector:

At the telescope side, the TSOAG16 has a female M48x0.75 thread. This thread allows for a flexible adaption.

Connection to 2" receptacles ... With the 2" extension ring TSVF230, you can attach the TSOAG16 to any 2" receptacles.

Connection to correctors with T2 or M48 thread ... The TSOAG16 can directly be screwed to correctors with M48 connecting thread. The adapter TST2-M48L allows for attaching to correctors with T2 connection.

More connection options ... In the accessories sector, you can find connectors to TeleVue, Vixen, Schmidt-Cassegrain and to the M68x1 ZEISS level adapter system.

How to adapt the imaging camara to the TSOAG16:

For a suitable camera connection, you need one of the optional connecting adapters. The adapters are made for the TSOAG16 and match perfectly. They increase the optical length of the OAG only 1 mm.


The adapters are conical, always ensuring the optimal position. At the same time, you can take down the camera without unscrewing it.

TSOAG9-T2 ... for any other connections via the M42x0.75 / T2 thread

TSOAG9-M42 ... the M42x1 connection is used mainly for a short adaption of DSLR cameras.

TSOAG9-M48 ... for any other connections via the M48x0.75 / 2" filter thread

TSOAG9-EOS ... allows the direct connection of Canon EOS DSLR cameras.

Instructions - Focusing the autoguider or crosshair eyepiece

First, the camera is focused. A coarse determination with a ruler makes sense, the distances were measured from the prism. The single adjustment can also be done at day, on a church spire, but also at night on a star.

Then, the crosshair eyepiece or the autoguider is attached and focused by shifting the T2 adapter. The focuser is not used here.

Instructions - adjusting the prism optimal to the camera sensor

The optimal position of the small prism is just outside of the camera sensor, then you have the best illumination possible and avoid shading by the prism. Within this range, you can shift the prism as you want for increasing the area used for searching a guide star.

However, modern high-sensitive autoguiders always offer enough guide stars, making the adjustment of the prism, common in former times, unnecessary. Therefore, a single optimisation is sufficient.

Installation and operating instructions

The installation and operating instructions can be found under the following link: Instructions

Safety informations: PDF Download