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- 90mm f/5.6 Fluorite Doublet APO will blow you away!
- High quality machining and very accurate dual-axis drive make the EM-11 a pleasure to use.
- Can be upgraded to Temma II "GoTo" at a later time if desired.
- Now comes with BT Technologies finder bracket quick release!
The latest telescope model from Takahashi is a truly portable design. The 90mm (3-1/2") f/5.6 fluorite doublet apochromatic
optical system is of outstanding quality, with a focal length of 504mm. The optical tube assembly is only 13.8" long and weighs 7
pounds; small enough for an airline 'carry-on'.
Not only is this instrument an excellent choice for astronomy, it can be used as a portable high-quality telescope for
birding. The oversize focuser has an adapter for 2" and 1-1/4" diagonals, and accepts the FS series photographic adapters.
Shipping charge is for 2nd Day Air which is required by Takahashi
Included Items:
- Sky-90II Fluorite APO Refractor OTA
- EM-11 USD III Mount
- Tripod
- 6X30 Finder
- Finder Bracket
- BT Technologies Finder Bracket Quick Release
- Tube Holder
- Compression Ring Diagonal Prism
- 18mm LE 1.25" Eyepiece
Specifications for the EM-11 USD III Mount:
- Drive System: Dual axes, quartz control, driving frequency: 100pps N/S, Star/Sun switching by hand controller
- High Speed Drive: 120X at DC12V, 250X at DC24V
- Correcting Speed (Manual Operation): RA: 0.1 ~ 1.9x to the sidereal rate by 0.1X increments. Dec: +/- 1.5 ~ 13.5 arc sec/sec
by 1.5 arc sec/sec increments
- Mode Indicator: High speed operation - red light. Normal operation: green light
- Power Source: DC12V or DC24V
- Power Consumption: DC12V: 0.3/1.3A (1.7A) sidereal/high speed (start). DC24V: 0.3/1.9A (1.9A)
- Operational Temperature: -5 ~ +30ºC
Specifications for Sky 90II H - 3.5" f/5.6 APO
on EM-11 USD III Mount:
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Optical Coatings |
Fully
Multi-Coated |
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Optical Design |
Apochromatic
Fluorite Doublet Refractor |
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Aperture |
90mm
(3.5") |
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Limiting Visual Magnitude |
11.5
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Focal Ratio |
f/5.6
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Focal Length |
504mm
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Optical Tube Dimensions |
95mm
X 370mm (3.73" X 14.54") |
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Focuser Design |
Rack
& Pinion |
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Mount Type |
German
Equatorial |
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Drive System |
Dual-Axis
USD III |
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Weight - OTA |
7
lbs. (3.2kg) |
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