Meade LX200GPS-SMT Technical Manual page 43

Fig. 24: Series 4000 8 - 24mm Zoom
Eyepiece.
Fig. 25: #140 2x Barlow Lens.
Fig. 26: #905 Variable Polarizer and
#1A Skylight Filter.
Fig. 27: #929 2" Diagonal Mirror and
#928 45° Erect-Image Diagonal
Prism.
42
Series 4000 8 - 24mm Zoom Eyepiece: The internal zoom optics of this eyepiece
move on smooth, precisely machined surfaces which maintain optical collimation at
all zoom settings. A scale graduated in 1mm units indicates the zoom focal length in
operation. An excellent addition to any eyepiece set.
#140 2x Barlow Lens: A 3-element design, doubles each eyepiece power while
maintaining uncompromised image resolution, color correction, and contrast. Insert
the #140 into the telescope's eyepiece-holder first, followed by the diagonal prism and
eyepiece. The #126 2x Barlow Lens, a compact 2-element alternative to the #140,
may also be employed with any
Series 4000 Photo-Visual Color Filters: Color filters significantly enhance visual
and photographic image contrast of the Moon and planets. Each filter threads into
the barrel of any Meade 1.25" eyepiece, and into the barrels of virtually all other eye-
piece brands as well. Meade filters are available in 12 colors for lunar and planetary
applications, and in Neutral Density as a lunar glare-reduction filter.
Series 4000 Nebular Filters: A modern boon to the city-dwelling deep-space
observer, the interference nebular filter effectively cancels out the effects of most
urban light pollution, while leaving the light of deep-space nebular emissions virtual-
ly unattenuated. Meade Series 4000 Nebular Filters utilize the very latest in coating
technology, and are available with threaded cells for eyepieces or for attachment to
the rear cells of Meade Schmidt-Cassegrain models.
Variable Tele-Extender: For eyepiece-projection photography of the Moon and the
planets, a Tele-Extender is required. The variable Tele-Extender threads onto the tele-
scope's eyepiece-holder, into which is inserted an eyepiece of typically about 26mm
focal length; the 35mm camera body couples to the tele-extender by means of a T-
Mount. The Meade Variable Tele-Extender permits a range of projection images.
#929 2" Diagonal Mirror; #928 45° Erect-Image Diagonal Prism: The #929 2"
Diagonal Mirror (provided as standard equipment on the 12"
optionally on other models) attaches to the rear cell of all
permits the use of wide-field 2" O.D. eyepieces (e.g., Meade Series 4000 Super Wide
32mm and 40mm eyepieces and others). Each diagonal includes a Meade optical-flat
®
mirror of Pyrex glass, aluminized and multi-coated. Diagonal mirrors and prisms
result in images that are correctly oriented up-and-down but reversed left-for-right. For
terrestrial observing a fully correctly oriented telescopic image is desirable; the #928
Diagonal Prism accomplishes this image correction and places the eyepiece at a
convenient 45° viewing angle. The #928 is for use with the 1.25" Eyepiece-Holder.
Series 4000 Plössl 9mm Illuminated Reticle Eyepiece: The most advanced com-
mercially-available illuminated reticle eyepiece, this Series 4000 Plössl 9mm model,
powered by an internal battery, includes micrometric x-y positioning controls which
greatly facilitate locking onto the guide star: Turn the finely-threaded controls and
place the reticle's crossline pattern precisely at the desired position in the field. The
sharp, high-power imaging of the 4-element, multi-coated Plössl optical system is
complemented by a rubber eyecup (foldable for eyeglass wearers) that shuts out dis-
tracting stray light from the observer's eye. The upper (lens) section of the eyepiece
rotates on a fine thread for precise diopter adjustment to the user's eye. Reticle pat-
tern is a double crossline with two concentric circles.
#62 T-Adapter: The T-Adapter is the basic means of prime-focus photography through
all Meade Schmidt-Cassegrain models. Thread the T-Adapter on to the rear cell of
your telescope, followed by a T-Mount for your 35mm camera, and the camera body
is rigidly coupled to the telescope.
#777 Off-Axis Guider: The Off-Axis Guider provides a means during long-exposure
astrophotography for the photographer to monitor the tracking of the telescope to
assure that the telescope remains precisely positioned on the object being pho-
tographed. Like the T-Adapter, the Off-Axis Guider couples the camera body to the tel-
escope but it also causes a small amount of the guidestar's incoming light to be divert-
ed at a right angle, where the star's position can be examined for tracking errors with
an illuminated reticle eyepiece; position corrections can then be effected using
Autostar II.
-Series telescope.
LX200GPS
LX200GPS
, available
LX200GPS
telescopes and