Takahashi - Sky 90II 90mm 3.5" f/5.6 Fluorite Refractor APO on EM-11 Temma II Jr Mount

90mm f/5.56 Fluorite APO refractor yields beautiful,high-contrast views.
OTA weighs only 7 lbs., great travel scope.
EM-11 Temma II, Jr. is a GoTo Mount that can handle a payload of up to 25 lbs.
10 arc-second or better tracking accuracy.
Now comes with BT Technologies finder bracket quick release!
Includes wooden tripod with Shimano Clamps.



The latest telescope model from Takahashi is a truly portable design. The 90mm (3-1/2") f/5.56 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.




Features for the EM-11 Temma II, Jr. Mount:



Drive System: Dual axes, quartz control, driving frequency: 100pps N/S, Star/Sun switching by hand controller
Useable Area: All over the world, but with limit for the latitude
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
Go-To Operation: By a PC or Takahashi hand controller (THC)
Go-To Disc: Pegasus 21
Accessory: RS232C cable or RJ-11 cable


Included Items for Sky-90 II - 3.54" f/5.6 APO Refractor on EM-11 Temma II, Jr. Mount:



FCL-90 Tube Assembly
EM-11 Temma II, Jr. Mount
FC-L Wooden Tripod w/ Shimano Clamps
Tube Holder
6X30 Finder
Finder Bracket
BT Technologies Finder Bracket Quick Release
18mm LE Eyepiece (1.25")
1.25" Compression Ring Diagonal 



  



 
Specifications for Sky-90 II - 3.54" f/5.6 APO
Refractor on EM-11 Temma II, Jr. Mount
 


 
Optical
Design 
Apochromatic Fluorite Doublet
Refractor 


 
Aperture

90mm (3.54") 


 
Limiting
Visual Magnitude 
11.5 


 
Focal
Ratio 
f/5.56 


 
Focal
Length 
19.8" (504mm) 


 
Optical
Tube
Dimensions 
3.7" X 14.5" (95mm X 370mm) 


 
Focuser
Design 
Rack & Pinion 


 
Mount
Type 
German Equatorial 


 
Drive
System 
Motorized with GoTo Capabilities



 
Weight
- OTA 
7 lbs. (3.2 kg.) 


 
Weight
-
Mount 
24.2 lbs. (11 kg.) 


 
Counterweights

1 - 7.7 lb. (3.5 kg.) 


 
Optical
Coatings 
Fully Muli-Coated