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Takahashi TOA-150 specifications

Optical features

Spec. TOA-150
Optical design Triplet Ortho Apochromatique
Optical mounting Air spaced
Glass types SD/ED
Optical coatings Fully Multi-Coated
Aperture 150mm
Resolution 0.77"
Visual limiting magnitude 12.7
Light grasp 459x
Focal length 1100mm
Focal ratio F/7.3
With TOA-FL35 flattener
Focal length 1080mm
Focal ratio F/7.2
Image circle 40mm
With TOA-FL67 flattener
Focal length 1090mm
Focal ratio F/7.3
Image circle 90mm (60% non-vignetted)
With TOA-RD reducer
Focal length 860mm
Focal ratio F/5.7
Image circle 50mm (60% non-vignetted)
With Extender-TOA 1.6
Focal length 1760mm
Focal ratio F/11.7
Image circle 40mm

Mecanical specifications


Spec. TOA-150
***Retractable dew-shield
Rack-and-pinion focuser diameter 101.6mm
Tube length (mini/maxi) 1100mm-1290mm (with standard accessories)***
Tube diameter 179mm
Tube weight 14.6 kg (balancing couterweight cradle : 4.8 kg)