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Idiomas disponibles
Idiomas disponibles
12
Looking at or near the Sun will cause irreversible damage to your eye. Do not point this telescope at or near the Sun. Do not look through the telescope as it is moving.
SPECIFICATIONS
StarPro™AZ 70 model:
Objective lens diameter
Optical tube focal length
Focal ratio
Mounting type
Viewfinder
StarPro™AZ 80 model:
Objective lens diameter
Optical tube focal length
Focal ratio
Mounting type
Viewfinder
StarPro™AZ 90 model:
Objective lens diameter
Optical tube focal length
Focal ratio
Mounting type
Viewfinder
StarPro™AZ 102 model:
Objective lens diameter
Optical tube focal length
Focal ratio
Mounting type
Viewfinder
What do the specifications mean?
Optical tube focal length is the distance
light travels in the telescope before being
70mm(2.8")
brought to focus in you eyepiece. Depending
700mm
on the telescope model, the focal length is
f/10
either 600mm to 900mm long. Look at the
Alt-azimuth
specification table to find out your telescopes
Red-dot
focal length.
Objective lens diameter is how big the
80mm(3.2")
front lens is on your scope. Telescopes are
900mm
always described by how large their objective
f/11.3
lens is. Depending on your telescope model,
Alt-azimuth
the lens diameter is either 70mm - 102mm.
Red-dot
Other telescopes are 50mm, 8 inches, 16
inches, or even 3 feet in diameter.
Hubble Space Telescope's objective lens
90mm(3.5")
has a diameter of 2.4 meters (that's 7.8 feet
600mm
across!).
f/6.7
The focal ratio helps determine how fast the
Alt-azimuth
photographic speed of a telescope is. The
Red-dot
lower the focal ratio number, the faster the
exposure. f/5 is faster than f/10. The faster
the ratio, the shorter the exposure time
102mm(4.0")
is needed when a camera is hooked up to
660mm
the telescope. For example, the Infinity 80
f/6.5
telescope has fast focal ratio at f/5.
Alt-azimuth
Red-dot
The
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