Terrestrial Observing; Image Orientation; Optional Accessories - Meade LX10 Schmidt-Cassegrain Instruction Manual

8” telescope
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The Meade Off-Axis Guider and Illuminated Reticle Eyepiece,
optional accessories fully described in the Meade General
Catalog, fulfill the first requirement above. The LX10's
standard-equipment hand controller, when equipped with the
optional LX10 Electric Declination Motor, satisfies the second
requirement. With the Electric Declination Motor attached, all
four correction pushbuttons of the hand controller (N-S-E-W)
are actuated, for precise dual-axis corrections during long-
exposure astrophotography.
A few tips for basic astrophotography with the LX10:
The LX10 must be precisely polar aligned, as discussed
above.
The tripod must be on a solid surface and the base of the
equatorial wedge must be level.
Always use a cable-operated shutter release. Using the
shutter release on the camera body may cause the
camera to vibrate and blur your photograph.
Focus the image with extreme care. While observing the
celestial object through the camera's viewfinder, turn the
LX10's focus knob to achieve the sharpest possible focus,
then open the camera's shutter to begin your exposure.
For terrestrial photography with the LX10, be aware that
long distance photography is best accomplished in the
early morning hours before heat waves begin to rise from
the Earth's surface, and distort your photograph.
Astrophotography is an acquired skill; exercise patience
and expect to waste a few rolls of film as you learn the
techniques. The rewards of taking a quality astrophoto-
graph, however, will make all your efforts worthwhile.

TERRESTRIAL OBSERVING

Although principally designed for astronomical observing, the
LX10 makes an excellent terrestrial observing tool.
The telescope's controls are utilized in the same manner as for
astronomical applications, but there are several significant
d i fferences in how you will locate and observe terrestrial
s u b j e c t s .

1. Image Orientation

The LX10's viewfinder presents an inverted image; what you
see appears upside-down and reversed left-for-right.
With the standard-equipment diagonal prism and 25mm
eyepiece in place in the main telescope, terrestrial images will
appear right-side-up, but reversed left-for-right. This orientation
is usually acceptable for terrestrial observing, except in the case
of reading a distant sign or automobile license plate, for
e x a m p l e .
Terrestrial image orientation can be fully corrected with the
optional Meade #928 45° Erect-Image Diagonal Prism (see
OPTIONAL ACCESSORIES, opposite).
- 15 -

OPTIONAL ACCESSORIES

A wide assortment of professional Meade accessories is
available for the 8" LX10 telescope. The premium quality of
these accessories is well-suited to the quality of the instrument
itself. Consult the Meade General Catalog for complete
details on these, and other, accessories.
Meade Series 4000 Eyepieces:*
Eyepiece
Magnifying
Power
Super Plössl (4-elements)
SP 6.4mm
313X
SP 9.7mm
206X
SP 12.4mm
161X
SP 15mm
133X
SP 20mm
100X
SP 26mm
77X
SP 32mm
63X
SP 40mm
50X
SP 56mm
36X
Super Wide Angle (6-elements)
SWA 13.8 mm145X
SWA 18mm
111X
SWA 24.5mm 82X
SWA 32mm
63X
SWA 40mm
50X
Ultra Wide Angle (8-elements)
UWA 4.7mm 426X
UWA 6.7mm 299X
UWA 8.8mm 227X
UWA 14mm
143X
* Refer to Magnification (page 9) to determine which optional
eyepieces are best-suited to your applications and how to avoid
"overpowering" the telescope.
#140
2x
Barlow
amplifying lens, the #140 2x
Barlow doubles the power of all
eyepieces with which it is used.
Insert the #140 into the telescope's
eyepiece-holder first, followed by
the diagonal prism and eyepiece.
#928 45° Erect-Image Diagonal
Prism: Primarily used for terrestrial
viewing, this prism presents a
correctly-oriented
image
comfortable 45° viewing angle.
Illuminated Reticle Eye p i e c e s :
Meade
Illuminated
Eyepieces are used for precise
polar alignment of your telescope
and,
during
long-exposure
a s t r o p h o t o g r a p h y, in conjunction
with the optional Meade Off-Axis
Guider, for through-the-telescope
monitoring of the object being
photographed while the camera's
shutter
is open.
Two optical
designs are available: Series 4000 Plössl 9mm or Modified
Achromatic 12mm.
LX10 Field Tr i p o d : The fixed-
height LX10 Field Tripod permits
an
extremely
rigid
platform for the telescope, even at
high magnifications. The 32" height
is
convenient
for
observations. For field use the
tripod collapses for easy transport.
With #140
2x Barlow Lens
626X
412X
322X
266X
200X
154X
126X
100X
72X
290X
222X
164X
126X
100X
852X
598X
454X
286X
Lens:
A n
at
a
Reticle
observing
standing

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