Testimonial: Nachdem ich Jahre zufrieden mit einer Losmandy G11 gearbeitet habe und sie langsam an ihre Grenzen gestoßen war, musste etwas Neues her. Die Entscheidung fiel auf eine ASA DDM60pro, da für mich das Beste grad gut genug ist. Nach nun einem Jahr im Betrieb, zuerst mobil und seit ein paar Monaten in meiner Sternwarte, kann ich sagen, dass meine hohen Erwartungen bei Weitem erfüllt wurden. Bin jedesmal von der Nachführgenauigkeit und von der Verarbeitungsqualität begeistert. Alles in allem bin ich sehr zufrieden mit meiner Montierung und froh mich für ASA entschieden zu haben.


ASA Direct Drive Mount

ASA Direct Drive Mount DDM60 ASA Direct Drive Mount DDM85 ASA Direct Drive Mount DDM160
The "entry level product".
This mount is especially
designed as a portable
device for astrophoto-
graphers working in the
field. The mount comes with
all the features you would
expect of a professional
telescope mount!

The "workhorse".
A mount for professional
Astrophotographers and it
is still suitable for
portable use.
The "flagship".
160 mm thick hollow axles
and many hundred newton
meters of torque has
brought into being one of the
most stablest observatory
class mounts of our

Fast polar alignment with laser
(optional) and software
Excellent high-precision pointing and tracking without guiding
Zero wear and no operation noise
Zero drift, zero play
(no periodic errors or backlash)
Software compensation of telescope hysteresis
Control-, Pointing- and Tracking-Software included in delivery

Our mission at ASA, over the past few years, has been to develop a new mount with similar tracking technology used by professional Observatories, and offer that mount at a fair price. We have achieved our objective with this new line of mounts! The accuracy of any manufactured part is generally limited by the mechanical characteristics. Even the finest astronomical mounts, relying on mechanics lone, cannot solve all the problems experienced during a common astronomical imaging session. Thus we have to look with one eye at the development status of the professional Observatories where mechanical limits are also shared by the best commercially available mounts. Borrowing a page from the professionals, we too seek to overcome those issues with well-engineered, electronic solutions that come with a very costly price tag.

However, here at ASA, we have managed to find ways to lower the cost of these incredible electronic solutions without compromising the performance quality. Therefore we present them to you within an affordable price range.

Our answer is to employ high resolution encoders mounted directly on the axes of the mount.

ASA uses Renishaw Encoders, which are verified electronically and resolve to an unbelievable 0,01-0,02 seconds of arc.

Positioning information is communicated by the mellow software developed by Philipp Keller. The tracking accuracy is accomplished by comparing the actual position of the system, 100 times per second in real time. This permits any required corrections to be applied immediately.

Dependent on the diameter of the encoder a tracking accuracy of 0,2 - 0,4 seconds of arc is provided without guiding. The Torque motors (direct drives without gears and no backlash) we are using could operate in a range of one-hundredth of arc seconds.

Thus in most cases guiding is not necessary and the use of ancillary support systems such as adaptive optics (Starlight, SBIG) is no longer necessary.

Because of this excellent tracking, purchasing an ASA mount can begin to immediately pay for itself over more traditional mounts. The tracking accuracy makes this an unbeatable purchase decision.

By collaborating with Dipl. Phys. Philipp Keller, ASA has saved significant development time and cost. After all why should we too reinvent the wheel? Dr. Keller’s proven designs have already stood the test of time and one just needs to view the legendary history of the current professional observatories that use his time tested technology.

Of particular interest one might be amazed to learn that the by using an ASA mount Autopointing (plate solving) via CCD camera is no longer required. Thus ASA mounts can be very quickly and easily used in the field.

Actually the normal tracking operations disrupted by a momentary gust of wind will be quickly and easily compensated with this technology. Also no more wasted time and frustration searching for a guiding star. The ASA direct drive mount can also be used very easy and reliably in remote controlled operations.

ASA Product-Folder (3 MB)


MLPT is currently the fastest method for ASA DDM mounts to precisely tracking without autoguider. [More Information]