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SHARPSTAR CF-90II ED refractor telescope has the
following
characteristics：
• 90MM f / 6.67 fully-muit-coated
triplet air-spaced optical design
• Contains 1 ED lens, Japanese OHARA FPL -
53 super ED lens
• New dual-speed 2.5 inch rack and pinion control gear, 10:1
micro-drive focus
• Carbon fiber tube is more beautiful and durable and
lightweight material
• 2 inch and 2.5 inch universal interface
• 360
degree rotation angle regulator
• Tube ring and a pair of universal dovetail
• lens hood with sliding lock
• with Finder bracket
SHARPSTAR CF-90II ED apochromatic
refractor optics tube assembly is a air-spaced of three-triplet design.which
includes FPL-53 and all-surface
fully-muti-coated.
SHARPSTAR CF-90II ED as a result of the
appropriate facal ratio provides an excellent balance between observation and
recording system.Unique three-tirplet design is to join a specialED lens ,making
excellent color control,star point sharp,image formation even
more.
The
pictures of zhejiang amateur use CF-80II filming “M54”
:
SHARPSTAR CF -
90II ED Canon 450D camera
Single exposure
of ten minutes,six superimposed
Otherwise,
M45, M13 were taken with CF-90II.
This
machine uses aluminum alloy tube material, elegant appearance, style, weight
only 3.2kg package of the tube, easy to carry
SHARPSTAR CF-90II ED providing excellent optical system, but also
provide an impressive focus system. SHARPSTAR CF-90II ED has dual-speed 2.5 inch
tooth focusing device, focus ratio of 1:10.compared with the number of refractor
focusing device is used without teeth，but
tooth focusing device land more. More fastness.so
that you observed the use of heavy shooting in the attachment, the device will
no longer focus slipping ,out of focus and trouble. In addition,The distribution
of the 360-degree roating camera angle allows you to easily rotate,shoot their
satisfaction with work. Focusing device carried by 2 inch and 1.25 inch
international standard interface,use the brass ring will not scratch your
accessories. More importantly, the focus of its 2.5 inch barrel than most
commercially available specifications of the 2 inch barrel to focus, more
robust, more stable, but also for future upgrades by large-diameter flat-field
focal lens and other heavy accessories provide a good
support.
If SHARPSTAR CF-90II ED lens with only a 2-triplet
APO systems ,and that relative to its price is also reasonable, but SHARPSTAR
CF-90II ED provides a fast focal ration of the triplet systems and
APO with FPL-53 Super ED glass, a 2.5-inch medium-sized dual-speed gear focusing
device, and its cost-effective
self-evident.
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