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For example, if you are using a 25mm eyepiece, the resulting power will be:
Power = 700mm ÷ 25mm = 28X.
For example, if you are using a 12.5mm eyepiece, the resulting power will be:
Power = 700mm ÷ 12.5mm = 56X.
The purpose of a Barlow lens is to increase the magnification possible with a given eyepiece. The 3x
Barlow supplied with this telescope will triple the normal eyepiece power. For example, the 25mm
(28X) eyepiece, when used in conjunction with the 3x Barlow lens, yields 84X. The 12.5mm (56X)
eyepiece yields 168X when used with the 3x Barlow lens.
To use the 3x Barlow lens, remove the diagonal mirror (13, Fig. 1) from the focuser drawtube (15, Fig.
1). Then insert the 3x Barlow lens, followed by the diagonal mirror (13, Fig. 1) and finally the 25mm
eyepiece (1, Fig. 1). Refocus until the image is sharp.
A FEW WORDS ABOUT POWER
The useful higher magnification with any 60mm diameter telescope is in the range of 80 to 120 power.
The general rule to follow with any telescope, regarding power: Only use as much magnification as a
steady, well-defined image supports. The stability of the air varies and is one reason why having
various eyepieces is desirable. Higher powers are no guaranty of better images; in fact, the opposite
is often true.
MAINTENANCE
As with any quality optical instrument, lens surfaces should be cleaned as infrequently as possible. A
little dust on the surface of the objective lens (14, Fig. 1) causes negligible degradation of image quality
and should not be considered reason to clean the lens. When lens cleaning does become necessary,
use a camel hair brush or compressed air to gently remove dust. Wipe only with a soft, clean cloth,
applying as little pressure as possible to avoid scratching glass surfaces. Note: Remove the dew
shield/lens shade (21, Fig. 1) to access the objective lens (14, Fig. 1).
SPECIFICATIONS
Objective (main) lens focal length . . . . . . . . . . .700mm
Objective lens diameter . . . . . . . . . . . . . . . . . .60mm (2.4")
Focal ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . .f/11.7
Mounting type . . . . . . . . . . . . . . . . . . . . . . . . . .Altazimuth
OPTIONAL ACCESSORIES
See your full-service Meade dealer or the Meade General Catalog for further details on any of these
accessories.
#927 45° Erect-Image Roof Prism (0.965 O.D.): Correctly orients the telescopic image during
terrestrial observing and yields an image position at a 45° angle to the main telescope tube, resulting
in a more comfortable observing position in most cases.
Additional Eyepieces (0.965"): Meade recommends the following eyepieces for enhanced
astronomical and/or terrestrial viewing:
• MA 9mm (0.965" O.D.): Provides high quality, higher power, close-up observation of the Moon
and planets (78X).
• MA 40mm (0.965" O.D.): Offers the most dramatic, wide field of view for observing deep-space
objects. This is also the eyepiece most recommended for viewing objects on land (18X).
WRITE FOR THE FULL-LINE MEADE GENERAL CATALOG
MEADE INSTRUMENTS CORPORATION • 6001 OAK CANYON • IRVINE, CA 92618-5200
FOR SERVICE CALL (949) 451-1450, 8:30AM-4:00PM PACIFIC TIME, MONDAY-FRIDAY.