photo sharing and upload picture albums photo forums search pictures popular photos photography help login
Pawel Lancucki | profile | all galleries >> Pawel Lancucki - Amateur Astronomy >> My astronomy equipment >> Takahashi SKY90 tree view | thumbnails | slideshow

Takahashi SKY90

Probably the best small APO refractor all around. Large 90mm aperture in a short and compact package.

Aperture: 90mm
Focal length: 500mm
Photographic speed: f/5.9 in prime focus, f/8 with Extender-Q, f/4.4 with reducer


In prime focus perfect for wide filed observing. For planetary views, the traces of chromatic aberration can be reduced using optional Extender-Q.

For CCD or DSLR / film imaging, the scope has too much field curvature and off-axis astigmatism. However, with the optional f/4.4 reducer, the field is flat and aberration free to the edge of DSLR chip. Perfect astrograph for wide to medium sized objects.
previous pagepages 1 2 ALL next page
img_9377_s.jpg
img_9377_s.jpg
img_9378_s.jpg
img_9378_s.jpg
img_9379_s.jpg
img_9379_s.jpg
img_9381_s.jpg
img_9381_s.jpg
img_9382_s.jpg
img_9382_s.jpg
img_9383_s.jpg
img_9383_s.jpg
img_9384_s.jpg
img_9384_s.jpg
img_9385_s.jpg
img_9385_s.jpg
img_9386_s.jpg
img_9386_s.jpg
img_9387_s.jpg
img_9387_s.jpg
img_9388_s.jpg
img_9388_s.jpg
img_9389_s.jpg
img_9389_s.jpg
previous pagepages 1 2 ALL next page