Advanced Telescope Supplies

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Software Bisque Paramount MEII



The table below compares the Paramount ME II and Paramount ME


 Paramount ME II

Paramount ME

Control system electronics

MKS 5000  (Fifth generation)

One board  includes all ports and control system  electronics

MKS 4000 (gen 4) and Adaptor Panel

Two board design; Adaptor Panel includes plug in ports; MKS 4000 board contains the control system electronics.


Counterweight shaft 

  • 47 cm (18.5 in.)x 4.8 cm (1.875 in.) 
  • Carries up to six counterweights
  • 46  (18 in.) long and 3.8 cm (1.5 in.) in diameter 
  • Carries up to six counterweights


14 kg (30 lb), two  included

9 kg (20 lb), two included

Declination bearing

8-in (48 contact points)

6-in (14 contact points)

Declination gear diameter

9.5 in.

7.5 in.

Declination housing

5 in. x 0.5 in. wall 6061 aluminum tubing

Rectangular aluminum box (6061)

Declination shaft diameter

3.0 in.

2.0 in.

Declination worm diameter

1.0 in.

0.75 in.

Hours past meridian (track and slew)


Maximum slew speed 4 degrees per second in right ascension and declination 3.5 degrees per second in right ascension, 5 degrees per second in declination

Motor diameter

2.3 in.

1.7 in.

Motor torque

30 in-oz

11 in-oz

On axis encoder (optional)

see below


Physical hard stop position



Power supply

221 W (+48VDC, 4.6A max.)

80 W

Right ascension bearing

8 in. (48 contact points)

8.6 in. (18 contact points)

Right ascension gear diameter

11.4 in.

11.4 in.

Right ascension housing

7 in. x 0.5 in. wall 6061 aluminum tubing

Rectangular aluminum box (6061)

Right ascension shaft diameter

3.0 in.

2.5 in.

Right ascension worm diameter

1.0 in.

1.0 in.

Software included

  • TheSkyX Professional Edition for Mac
  • TheSkyX Professional Edition for Windows
  • TPoint Add On (Mac and Windows)
  • Camera Add On (Mac and Windows)
  • Multi-OS and Six License Add On for Mac and Windows

Bisque Observatory Software Suite

Through the mount cabling

Large diameter cable conduits.Cables can be run through the mount without altering polar alignment, removing the optical tube assembly, or altering the polar alignment and no mount disassembly is required.  


Smaller diameter cable conduits, some mount disassembly required when adding cables.

USB ports on Instrument Panel

Two (2)


Weight (mount body with no payload)

38 kg (84 lb)

31 kg (69 lb)

Weight capacity (total payload without counterweights)

109 kg (240 lb)

68 kg (150 lb)

Photo showing both the Paramount ME II and the Paramount MX Robotic Telescope Mount

On-Axis Encoders

On Axis Encoders Executive Summary


  • Mount is easier to use by eliminating the need to initialize the mount's position (through homing or synchronization) at start up or after power loss.

  • Provides improved pointing and tracking accuracy by continuously monitoring the position of the main gear, as opposed to encoder mounted directly to the motor's drive shaft, the Paramount ME II, with TPoint, can achieve an estimated five (5) arcsecond RMS all sky pointing.

  • Virtually eliminates errors caused by periodic error as well as the need to train periodic error.

  • Optional component can lower total costs by mounting one one on-axis to the right ascension axis (homing in declination would still be required.)

  • Transparent operation; the on-axis encoder hardware and electronic sensors are integral to the mount's mechanical design and integrated into the MKS 5000 control system electronics as well as TheSkyX Professional Edition.



  • Cost. On axis encoder technology is expensive.

  • Availability: The on-axis encoder option is not presently available. 

  • Relatively small performance gains: The improvements in pointing tracking and tracking accuracy are relatively minor.  For example, without on-axis encoders, the Paramount ME II, on a stable pier, with a robust payload, periodic error correction enabled, and a TPoint Super Model based on 200 or more pointing samples, can achieve 10 arcsecond all sky RMS pointing accuracy and 15 minute unguided exposures at moderate focal lengths with tracking errors less than one arcsecond.

Software Bisque will offer optional on-axis encoders for the Paramount ME II; the estimated ship date at this time is second quarter 2014.  The tentative (and subject to change) details about optional on-axis encoders are below:

While on-axis encoders have many advantages as described above, they should not be considered the "panacea" for taking long, unguided photos. Fortunately, TPoint's ProTrack (a software technology exclusive to Paramount mounts) compensates for external factors such as optical tubes that bend and differential refraction that conspire to degrade pointing and tracking accuracy and cannot be "fixed" with on-axis encoders.



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