Takahashi - Sky 90II H 90mm 3.5" f/5.6 Fluorite APO on EM-11 USD Temma III Mount

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:



 
Optical Coatings 
Fully
Multi-Coated 


 
Optical Design 
Apochromatic
Fluorite Doublet Refractor 


 
Aperture 
90mm
(3.5") 


 
Limiting Visual Magnitude 
11.5



 
Focal Ratio 
f/5.6



 
Focal Length 
504mm



 
Optical Tube Dimensions 
95mm
X 370mm (3.73" X 14.54") 


 
Focuser Design 
Rack
& Pinion 


 
Mount Type 
German
Equatorial 


 
Drive System 
Dual-Axis
USD III 


 
Weight - OTA 
7
lbs. (3.2kg)