Strength, Rigidity and Precision of Manufacture.
Maximising strength and minimising total weight has been an important aspect of the design process. The mount is at the limits of existing technology and materials use, whilst maintaining a reasonable asking price for product quality.

Thermal Mechanical Stability.
The basic design concept enables the Ellesa to be operated successfully over extreme temperature ranges and temperature gradients without affecting the performance or precision of operation. Estimated operating temperature ranges from minimum of -10 degrees Celcius to maximum of +50 degrees Celcius.

Forward Compatibility.
The overall basic design enables the mount and all options to be upgraded at any time as needed by the customer. It is therefore possible to purchase the mount with only basic accessories as needed at the time of purchase, bearing in mind that as needs and requirements increase further accessories can be purchased to increase the performance levels of the product. We expect that many new options will be made available in the near future so as to increase the versatility of the total product. Also, as technology develops in the industry in general newer and higher level options will become available.

Number of Options Available.
A significant number of options are available for both variants of the Ellesa. The choice can be made by the customer to suit particular requirements. If neccesary during the ordering process we will provide assistance with what is needed.

Number of Drive Controllers Available.
Both versions of the Ellesa are compatible with a number of drive controllers and total observatory systems offered by various manufacturers and depend on customer needs and requirements. The customer is not forced to purchase a proprietary drive controller, or any controller at all. During the ordering process Anssen determines the most suitable motor and gear reducer combination as needed by the customer.

Simple Operation.
Basic processes and operations are well laid out with simple manual access assuming that the majority of the use of the equipment is in total darkness and most probably with the operator wearing protective clothing. During both imaging operations and computer controlled operations it is entirely possible that the operator will rarely need to manually touch the mount which increases time management efficiencies and end image quality. We are aware that during imaging runs and surveillance operations every second can count.

Ease of Fitment and Interchange of Optical Tube Assemblies.
The general layout of the German equatorial mounting system permits a flexible arrangement of telescope payloads which are neccessary to many amateurs. Simple and straightforward design techniques of the Ellesa help accentuate the ease of fitting any number of optical tube assemblies up to the permssible maximum load capacity. It should be noted that although we advertise a maximum load rating in kilograms for each version of the mount these are only offered as a guide. There are many telescopes which are overly long relative to their weight and aperture and may overload the mount. Please contact us should you have concerns about this point.

  Specifications.

  **Please note that traditionally Anssen has fewer teeth on the worm wheels than many of our competitors. High tracking accuracies are obtained (amongst many other reasons) with gears that are precision machined and precision ground and that are of large surface areas. A larger number of teeth is not required to achieve high resolution tracking performance. The accuracy, strength and shear loading is achieved with both relatively large surface areas and cross sectional areas of each gear tooth. A larger number of teeth result in smaller tooth size with smaller surface and cross sectional areas, hence weaker teeth.

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