Mewlon-210 with EM-11 USD-3 EQ

Mewlon-210 with EM-11 USD-3 EQ

You have dreamed of a reflector with exceptional and powerful optics, with a generous diameter and with the guarantee of an incredible contrast : Mewlon is for you !

With its Cassegrain range reflectors, based on Dall-Kirkham optical design, Takahashi acted as a pioneer, and made Schmidt-Cassegrain other manufacturers outdated. This reflector with its excellent optical qualities can be used in a wide range of applications, and brings it on the top of the market. No worldwide mass production of reflectors can be compared to the Mewlon and be able to offer similar performances: compactness, power, rationality and versatility.

Optics:

Mewlon are Cassegrain reflectors using the Dall-Kirkham optical design. The elliptic primary mirror is associated with a spherical secondary mirror. The image is returned to the back of the instrument via an opening spared in the center of the primary mirror.

The EM-11 is a very compact and transportable German equatorial mount, with a maximum loading capacity of 9 kg. The serious amateur will reserve it for OTAs weighting up to 6 kg, such as the TSA-102, Mewlon-180 or Maksutov-Cassegrain of 150mm diameter, in order to take advantage of the effectiveness of a mount over sizing. The tracking accuracy of the EM-11 thus gives its best in using OTAs until their limits in imagery. The EM-11 becomes, in this case, a compact and efficiency EQ mount with an excellent transportability/performances ratio, adapted to the itinerant amateur.

 

 

 

 

                Optical Specification:

  • Optical Design- Dall-Kirkham (Cassegrain)
  • Effective aperture- 210mm
  • Primary mirror diameter (focal length)- 220mm (F/2,9)
  • Secondary mirror diameter (amplification)- 65mm (x4)
  • Secondary obstruction- 0,32
  • Focal length (at prime focus)- 2415mm
  • Focal ratio (at prime focus)- F/D 11,5
  • Resolution- 0,55”
  • Limiting magnitude- 13,4
  • Light grasp- 900x
  • Image circle- 18mm
  • Back focus- 210mm
  • Eyepiece holder(s)- 50,8mm/31,75mm
  • Focal length- 1961mm
  • Focal ratio- F/D 9,3
  • Image circle- 39mm
  • Photographic field- 1,2°
  • Tube length- 700mm
  • Tube diameter- 244mm
  • Tube Weight- 8Kg

EM-11 USD-3 Mount Specification:

  • Type- German Equatorial Mount
  • R.A. Slow-Motion- Motor driven
  • DEC. Slow-Motion- Motor driven
  • Azimuth Adjustments- ± 10°
  • Elevation Adjustments- 20 to 50°
  • Polar Finder / Accuracy- Built-in / 5'
  • R.A. Setting Circle Accuracy- 10 arcminutes
  • DEC. Setting Circle Accuracy- 2°
  • Encoders- Not Supplied
  • Weight (without counterweight)- 7 kg
  • Counterweights- 3.5 kg
  • Maximal Loading Capacity-9 kg (without counterweight)
  • Optimal Loading Capacity- 6 kg (without counterweight)
  • Operating Voltage- 12V / 24V DC
  • Power Consumption-  12V : 0.3A (tracking at sidereal rate), 1.3A (high speed slewing), 1.7A    (starting) 24V : 0.3A (tracking at sidereal rate), 1.9A (high speed slewing), 1.9A (starting)
  • Tube moutings- 2 x M8 screws (separated by 35mm)
  • Mounting Capacities- Tube rings, plates and dovetail mounting plates
  • Option- Tripods, stand piers
  • R.A. axis diameter (material)- 52 mm (aluminium)
  • R.A. worm gear shaft diameter (material)- 14 mm (iron)
  • R.A. gear diameter (material)- 74mm/144 teeth (zinc)
  • DEC. axis diameter (material)- 52 mm (aluminium)
  • DEC. worm gear shaft diameter (material)-  14 mm (brass)
  • DEC. gear diameter (material)- 74 mm/144 teeth
  • Stepper Motors Accuracy- 100 pps
  • Slow Motion Speeds- 0.1x to 1.9x the sidereal rate
  • High Speed Mode- 120x the sidereal rate (12V DC)/ 240x the sidereal rate (24V DC)
  • Worm gear shaft cycle- 10 minutes
  • Tracking Accuracy- ± 10"
  • Autoguiding- SBIG ST-4/7 compatible