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Takahashi TSA-102N/S specifications

Optical specifications

Spec. TSA-102N/S
Optical design Triplet Super Apo
Optical mounting Air spaced
Glass types ED and Crown
Optical coatings Fully Multi-Coated
Aperture 102mm
Standard
Focal length 816mm
Focal ratio F/8.0
Resolution 1.14"
Visual limiting magnitude 12.0
Light grasp 212x
Image circle NA
Photo field NA
With TOA-FL35 flattener
Focal length 800mm
Focal ratio F/7.84
Image circle 42mm (60% non-vignetted)
22mm (100% non-vignetted)
Photo field 3° (@ 42mm image circle)
1.6° (@ 22mm image circle)
Spot sizes Center of field : 12µm
Edge : 12µm (@ 42mm image circle)
Photo size formats APS / DSR-DSLR compatible
With TOA-RD reducer
Focal length 610mm
Focal ratio F/5.98
Image circle 53mm (60% non-vignetted)
38mm (100% non-vignetted)
Photo field 5° (@ 53mm image circle)
3.6° (@ 38mm image circle)
Spot sizes Center of field : 8µm
Edge : 35µm (@ 53mm image circle)
Photo size formats APS / DSR-DSLR compatible

Mecanical specifications

Longitudinal view (lengths in mm)

Takahashi TSA-102S longitudinal view Longitudinal view of TSA-102 rack-and-pinion focuser
Spec. TSA-102N TSA-102S
Tube length 978mm 790mm-890mm (with 50.8mm and 31.75mm adapters)
Tube diameter / with dew tube 114mm / 145mm
Tube weight 5 kg 5.4 kg