Takahashi SKY90 Apo Refractor OTA

The SKY-90 is the ideal compromise between a wide-field astrograph and general-purpose observation Apo refractor. Its great compactness makes it an excellent companion for the astrophotographer. Equipped with a premium Japanese apochromatic objective with Fluorite doublet of 90mm of aperture (F/5.6), it constitutes an unequalled optics for those wishing to have a transportable and general-purpose telescope, of astounding effectiveness.

Light and compact it does not require large expensive telescope mounts, supplied complete with 6x30 finder and tube ring clamshell.


Genuine authorised Takahashi product with full UK warranty

Optical design and chromatic correction
The SKY-90, in spite of its short focal distance, is adapted to all the fields allowed by its aperture, thanks to its very wide chromatic correction and thanks to some subtle compromises : a light under-correction of the spherical aberration at prime focus. Takahashi thus uses a less current optical design but much better corrected for imaging and planetary observation, in order to offer a transportable and general-purpose apochromatic telescope, an optics offering at the same time wide field and high-definition.

Excellent Mechanics
In order to fulfill the pointed requirements of imaging, the SKY-90 does not make any concession on mechanics. It is equipped with a precise, tighted rack-and-pinion focuser as well as a device of blocking the focuser course. The focuser end offers a 50.8mm adapter which it is placed very in front of the focal plane, to allow a great combination of accessory assemblies, including imagers equipped with large CCD sensors.

Specifications:
Optical design Fluorite Doublet
Optical mounting Air spaced (Fluorite in front)
Optical coatings Fully Multi-Coated
Aperture 90mm
Focal length 500mm
Focal ratio F/5.56
Resolution 1.29"
Limiting magnitude 11.5
Light grasp 165x
Finder 6x30
Tube ring clamshell

Special order item - please call 01932 703605 for delivery times