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Vixen Optics VMC200L Reflector Telescope
The VMC200L is a unique catadioptric optical system. It
incorporates a primary mirror and a meniscus corrector just before a secondary
mirror. By doing so, light is corrected twice on the optical path. The end
result is that spherical aberration and field curvature are corrected to a high
degree of optical performance. Vixen's VMC200L’s primary mirror is f/2.5; the
compound optical system is f/9.75. This combination creates a very compact and
portable system.
The GPD2 equatorial mount is the stronger and heftier
of the GP mounts. With its solid steel R. A. and Declination axes and brass worm
gears, this mount will hold up to years of heavy use. In order to assure
accurate tracking for astrophotography the worm gears are especially machined to
a very high precision that minimizes periodic error. Add the new Vixen
Starbook S with built in starchart for complete Go-To capabilities. |
Placing the optical correction placed before the secondary
mirror avoids the necessity of having a corrector plate and the dewing problems
associated with a closed optical tube.
The rack and pinion focusing is placed behind the primary
mirror. The use of this focusing system eliminates the image shift associated
with most other SCT systems. This is especially important when using high power
magnification or astro-photography. When focusing, the image is stable and easy
to adjust.
The VMC200L is a unique catadioptric optical system. It
incorporates a primary mirror and a meniscus corrector just before a secondary
mirror. By doing so, light is corrected twice on the optical path. The end
result is that spherical aberration and field curvature are corrected to a high
degree of optical performance. Vixen's VMC200L’s primary mirror is f/2.5; the
compound optical system is f/9.75. This combination creates a very compact and
portable system.
Placing the optical correction placed before the secondary
mirror avoids the necessity of having a corrector plate and the dewing problems
associated with a closed optical tube.
The rack and pinion focusing is placed behind the primary
mirror. The use of this focusing system eliminates the image shift associated
with most other SCT systems. This is especially important when using high power
magnification or astro-photography. When focusing, the image is stable and easy
to adjust.
The GPD2 equatorial mount is the stronger and heftier
of the GP mounts. With its solid steel R. A. and Declination axes and brass worm
gears, this mount will hold up to years of heavy use. In order to assure
accurate tracking for astrophotography the worm gears are especially machined to
a very high precision that minimizes periodic error. Add the new Vixen
Starbook S with built in starchart for complete Go-To capabilities.
VMC200L Specifications:
Construction: Catadioptric reflector
d=200mm (8”)
f=1950mm, f/9.75
Primary mirror: f=500mm, f/2.5
Secondary mirror: d=72mm, magnification 3.9x
Distance primary secondary:: ~330mm
Central obstruction 80mm diameter (40% of d)
Theoretical resolution (Dawes): 0.63"
Theoretical min magnitude: 13.3
Tube length ~525mm incl. focuser
Weight: 5.9kg
Technical data GPD2 Mount
- R.A Axis: 144 tooth worm gears
- Declination Axis: 144 tooth worm gears
- R.A. graduations: RA 10 min. increment
- Dec graduations 2 deg. Increments
- Polar Axis Scope: 6x20 wide field
- Mount includes pre-installed variable intensity illuminator
- Polar Axis Altitude adjustment 0 to 62 degrees
- Counter weight 1 x 3.7kg and 1 x 1.9kg
- Maximum loading weight 10kg (22lbs)
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