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Konus 1780 Newtonian telescope
diam. 4.5", focal 500 mm with R.A.motor drive with multicoated optics. Diameter
114 mm (4".5), focal lenght 500 mm (20"), focal ratio f/4.4. Equatorial mount
with RA motor. Metal tripod 69÷116 cm (2.3÷3.8 ft.). Stardot finderscope.
Eyepieces Plossl 10 mm and Plossl 17 mm, diam. 31.8 mm (1".25). Magnification
with supplied eyepieces 50x and 29x. Lunar filter. Atlas of the sky
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General Information |
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Manufacturer |
Konus |
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Manufacturer Part Number |
1780 |
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Product Line |
Telescope |
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Product Name |
780 Newtonian telescope diam. 4.5", focal 500 mm with R.A.motor drive, diameter
114 mm (4".5), focal lenght 500 mm (20"), focal ratio f/4.4 |
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Marketing Information |
- Reflector optical tube:
114mm (4.5”) aperture Newtonian reflector with all-glass
mirrors. Each mirror is coated with highly reflective aluminum and overcoated
with quartz for long life. No plastic mirrors. 500mm focal length aluminum
tube with protective tube end rings. Fast f/4.4 focal ratio for low power wide
angle views. The reflector design of the scope is totally free of the purple
haze of spurious color visible around the Moon and planets in lesser refractor
scopes. Images are sharp and clear. You can even collimate (align) the mirrors
for the sharpest images. This will have to be done only rarely, thanks to the
special design of the cell holding the lightweight mirror.
- Rack and pinion focuser:
The 1.25” focuser has dual focusing knobs for precise image
control with either hand. The large focus knobs are easy to operate, even
while wearing gloves or mittens in cold weather.
- Two eyepieces:
You get two good quality low to medium power 1.25” eyepieces –
a 10mm (50x) and a 17mm (29x) with a 1.55° field of view (more than three
times the diameter of the full Moon). Both eyepieces are a higher quality four-element
Plössl optical design than you find in most other telescopes in this size and
price range. They have antireflection multicoatings on their lens surfaces for
sharp images and very good contrast. Instead of providing low quality
eyepieces that give unrealistically high (and often unusable) magnifications,
Konus provides higher quality eyepieces with powers you can use and enjoy
every night you take your 4.5” Konus out to observe the faint fuzzies outside
our solar system. Optional eyepieces are available to let you increase your
magnification range significantly for closeup lunar, planetary, and globular
star cluster observing.
- Finderscope:
The supplied battery-operated non-magnifying red dot finder
seems to project a dot of red light on the sky exactly where the scope is
pointed at all times. It makes initial scope alignment and object centering
easy and painless.
- Moon filter:
You get a 1.25” optical glass Moon filter that threads into the
base of the eyepieces. It cuts the glare of the brightly-lighted Moon and
improves the contrast so it is easier for you to see faint details that might
otherwise be washed out by the brightness of the lunar surface.
- Equatorial mount:
The sturdy equatorial mount is designed for astronomical
observing. By aligning the mount on the north celestial pole, the supplied
motor drive can automatically follow the motion of the planets and stars as
they travel east to west across the sky. A counterweight on the opposite side
of the mount from the telescope balances the weight of the optical tube and
makes it easy to move the scope effortlessly from one part of the sky to
another.
- Motor drive:
The supplied single axis battery-operated right ascension motor
drive has a variable speed control to match the slightly different speeds at
which the Moon, planets, Sun, and stars move across the sky. This keeps
objects from drifting out of the field during long observing sessions, or
while several people in a row observe the same object. The drive runs up to 40
hours from one 9-volt transistor radio battery.
- Setting circles:
Setting circles (graduated scales marked in either hours and
minutes or degrees) are provided in both right ascension (the east/west
position of objects in the sky measured in hours and minutes) and declination
(the north/south position measured in degrees). These allow you to align the
scope on the approximate position of an object in the sky by using its r. a.
and dec coordinates from a star chart – before you search for it in the
finderscope and eyepiece. Setting circles can reduce the time it takes for you
to find the fainter and more difficult deep space objects.
- Manual slow motion controls:
There are two slow motion control knobs connected to the
mount by long flexible cables so they are easy to reach while observing. One
controls the scope’s motion in declination (the north/south direction in the
sky). Turning this knob enables you to correct for any north/south drift a
celestial object may take as it drifts across the sky, due to an improper
alignment of the scope on the north celestial pole when you first set it up.
The second controls the scope’s motion in right ascension (the east/west
direction in the sky). Turning this knob enables you to follow manually the
motion of celestial objects as they travel from east to west across the sky,
should the battery in your motor drive die when you’re out observing.
- Tripod:
The aluminum tripod easily adjusts from 2.4’ tall to 4’ to accommodate a
variety of observer heights. The tripod includes an accessory shelf that holds
your eyepieces and accessories.
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Features & Benefits |
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Newtonian telescope with multicoated optics
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diameter 114 mm (4".5), focal lenght 500 mm (20"), focal ratio f/4.4
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equatorial mount with RA motor
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metal
tripod 69÷116 cm (2.3÷3.8 ft.)
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Stardot
finderscope
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eyepieces Plossl 10 mm and Plossl 17 mm, diam. 31.8 mm (1".25)
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magnification with supplied eyepieces 50x and 29x.
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lunar
filter
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atlas
of the sky
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Suggested Optional |
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Eyepieces:
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Plossl 4 mm (125x) #1241
Plossl 6.3 mm (80x) #1242
Plossl 7.5 mm (67x) #1243
Plossl 25 mm (20x) #1246
Plossl 40 mm (12,5x) #1248
image rectifier for Newtonian #1048
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Filters:
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set 4 colored filters (Wr.-like)
#1100
nebular filter #1103
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Photography:
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Barlow lens 2x/photo adapter
#1054
dual photo adapter #1070
T-2 ring for reflex #various
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A-20050321-1285-130-L
M-20051202-1285-130-E
M-20060121-1285-111-E
M-20060123-1285-117-E
*This
item is BRAND NEW - not refurbished. It comes with all manufacturer supplied
accessories, and full manufacturer's USA warranty.
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