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This Page Updated
21st October 2016

Takahashi Product Technical Details

Optical Assemblies  ...  Equatorial Mounts

FS-60 ... SKY-90 ... TSA-102 ... TSA-120 ... FSQ-106 ... FSQ-85 ... Mewlon Series ... TOA-130 ... TOA-150

FS-60Q (FS-60CB + Takahashi 1.7x CQ Module)
Type: Fluorite Quad Refractor
Aperture: 60mm
Focal Length: 600mm
Focal Ratio: f/10
Tube Diameter: 80mm
Tube Length 407mm (FS-60Q) / 280mm (FS-60CB)
SKY-90
Type: Fluorite Doublet  Refractor
Aperture: 90mm
Focal Length: 500mm
Focal Ratio: 1 : 5.6
Resolving Power 1.29"
Limiting Magnitude 11.5
Light Gathering 165x
Effective Focal Length  
      w/Extender-Q 800mm
     w/Reducer-Flattener 407mm
Effective Focal Ratio  
     w/Extender-Q f/8.9
     w/Reducer-Flattener f/4.5
Image Circle 45mm (w/Reducer-Flattener)
Lens Shade Retractable
Tube Length 370mm (w/Lens Shade Retracted)
Tube Diameter 95mm
Total Weight Main Tube 3.2kg
  TSA-102N / S
Type: Triplet Super Apochromat
Aperture: 102mm
Focal Length: 816mm
      w/Reducer: 610mm
Focal Ratio: 1 : 8.0
      w/Reducer 1 : 6.0
Resolving Power: 1.14"
Limiting Magnitude: 12.0
Light Gathering Power: 212x
Image circle :  
      w/35 Flattener: 40mm
      w/Reducer: 50mm
Photographic field :  
      w/35 Flattener: 2.8
      w/Reducer: 4.7
Main Tube Diameter: 114mm
Main Tube Total Length: 890mm (790mm w/Lens Shade Retracted)
Weight: ~ 5.4kg
Finder Scope: 750 6.3
  TSA-120
Type: Triplet Super Apochromat
Aperture: 120mm
Focal Length: 900mm
Focal Ratio: f/7.5
Coating Broadband multi-layer anti-reflection coatings
   
  Mechanical Specifications
Diameter of Main Tube 125mm
Diameter of Dew Shield 160mm
Length of Main Tube 990mm
Weight of Main Tube 6.7kg
   
  with TOA-35 Flattener
Focal Length 882mm
Focal Ratio f/7.3
Image Size 7 microns RMS-spot radius on axis
7 microns RMS-spot radius 10mm off axis
7 microns RMS-spot radius 20mm off axis
Image Circle 40mm diameter (60% illuminated)
Angle of Field 2.6
   
  with TOA-35 Reducer
Focal Length 672mm
Focal Ratio f/5.6
Image Size 4 microns RMS-spot radius on axis
6 microns RMS-spot radius 10mm off axis
13 microns RMS-spot radius 20mm off axis
Image Circle 40mm diameter (60% illuminated)
Angle of Field 3.4
  FSQ-106ED
Type: Flat-Field Advanced Petzval Quadruplet
Aperture: 106mm
Focal Length: 530mm
Focal Ratio: f/5
Image Circle 88mm
Resolving Power 1.09"
Limiting Magnitude 11.9 mag
Light Gathering Power 229X
Diameter of Main Tube 125mm
Total Length of Main Tube 675mm (Lens-shade extended)  /  580mm (Lens-shade retracted)
Weight of OTA 7.0kg (15.4lbs) with finderscope
Finder Scope 7x50 6.3 (illuminator acceptable)
   
  with Extender-Q 1.6x
Effective Focal Length 850mm
Effective Focal Ratio f/3.6
Image Circle 44mm
Photographic Field 9.4
   
  with Reducer-QE 0.73x
Effective Focal Length 387mm
Effective Focal Ratio f/3.6
Image Circle 44mm
Photographic Field 6
  FSQ-85EDX
Type: Petzval 4-element flat-field
Aperture: 85mm
Focal Length: 450mm
Focal Ratio: f/5.3
Image Circle 44mm
Photographic Field 5.6
Back Focus 22mm
Tube Diameter 95mm
Diameter of Focuser 80mm
Draw Tube Stroke 42mm
Length of  Main Tube 645mm (Dew shield extended)  /  533mm (Dew shield retracted)
Weight of OTA 3.9kg (8.5lbs)
Finder Scope 6x30 8
   
  with Extender-ED 1.5x
Effective Focal Length 680mm
Effective Focal Ratio f/8.0
Image Circle 44mm
Photographic Field 3.7
Metal Back 117.5mm
   
  with Reducer-QE 0.73x
Effective Focal Length 328mm
Effective Focal Ratio f/3.86
Image Circle 40mm
Photographic Field 7
Metal Back 72.2mm
  MEWLON-180
Type: Dall-Kirkham Cassegrain
Aperture: 180mm
Focal Length: 2160mm
Focal Ratio: 1 : 12
  MEWLON-210
Type: Dall-Kirkham Cassegrain
Aperture: 210mm
Focal Length: 2415mm
Focal Ratio: 1 : 11.5
  MEWLON-250
Type: Dall-Kirkham Cassegrain
Aperture: 250mm
Focal Length: 3000mm
Focal Ratio: 1 : 12
  MEWLON-300
Type: Dall-Kirkham Cassegrain
Aperture: 300mm
Focal Length: 3572mm
Focal Ratio: 1 : 11.9
  EPSILON-180ED
Type: Hyperbolic Flat-Field Astrograph
Aperture: 180mm
Focal Length: 500mm
Focal Ratio: 1 : 2.8
  CN-212
Type: Newtonian-Cassegrain
Aperture: 212mm
Focal Length: Cassegrain 2630mm, Newtonian 820mm
Focal Ratio: Cassegrain 1 : 12.4, Newtonian 1 : 3.9
  TOA-130S / F
Type: Triplet Apochromat Refractor
Aperture: 130mm
Focal Length: 1000mm
Focal Ratio: 1: 7.7
  TOA-150
Type: Triplet Apocromat Refractor
Aperture: 150mm
Focal Length: 1100mm
Focal Ratio: 1 : 7.3
  BRC-250
Type: Baker Ritchey-Chretien Cassegrain
Aperture: 250mm
Focal Length: 1268mm
Focal Ratio: 1 : 5.1
  MT-300 & EM-2500 Mount
Type: Newtonian Reflector
Aperture: 300mm
Focal Length: 1750mm
Focal Ratio: 1 : 5.8
Finder Scope: 11 x 70
Length of Main Tube: 1586mm
Diameter of Main Tube: 390mm
Weight of OTA: Approx 86kg
   
EM-2500
Type: German type, all electrically driven with go-to system built-in
Polar Axis Azimuth: adjustable +/-3 degrees
Elevation: adjustable +/-1 degree
Motor Drive System Sun/Star switchable
R.A. correction speed 110% - 190%
High speed: +/-400x
Dec. correction speed 90% - 10%
High speed : +/-400x
Tracking accuracy Less than +/-5 sec.
Setting circle R.A. increment by 10 sec.
Dec. increment by 1 minute
Loading capacity Max. 70kg
Power source 100V AC
Weight Approx: 450kgs (main unit 350kgs, Pier-stand 100kgs)
  FCT-250 & EM-3500 Mount
Type: Fluorite Triplet Apochromat
Aperture: 250mm
Focal Length: 2500mm
Focal Ratio: 1 : 10
Finder 11x70
Length of tube ass'y 3050mm
Diameter of main tube 300mm
Weight of tube ass'y Approx. 120kgs
   
EM-3500
Type German type, all electrically driven with go-to system built-in
Polar axis Azimuth: adjustable +/-3 degrees
Elevation: adjustable +/-1 degree
Motor drive system Sun/Star switchable
R.A. correction speed Speed-up: 105% - 200%
Slow-down: 95% - 5%
High speed : +/-700x
Dec. correction speed 0%-100% stepless
High speed : +/-700x
Tracking accuracy Less than +/-5 sec.
Setting circle R.A. increment by 10 second
Dec. increment by 1 minute
Loading capacity Approx. 150kgs
Power source AC 100V
Total weight Approx. 820kgs: 520kgs (main unit), 300kgs (pier-stand)
 

 

 

 

 

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