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Discovery Spark 769 EQ Guia Del Usuario página 16

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Specifications
Optical design
Optics material
Aperture, mm
Focal length, mm
Highest practical power, x
Focal ratio
Tube material
Mount
Eyepiece barrel diameter
Tripod
Accessory tray
Finderscope
Eyepieces
Diagonal mirror
Barlow lens
Erecting eyepiece
Moon filter
The manufacturer reserves the right to make changes to the product range and specifications without prior notice.
Care and maintenance
Never, under any circumstances, look directly at the Sun through this device without a special filter, or look at
another bright source of light or at a laser, as it may cause PERMANENT RETINAL DAMAGE and may lead to
BLINDNESS.
Take the necessary precautions when using the device with children or others who have not read or who do not fully
understand these instructions.
Do not try to disassemble the device on your own for any reason. For repairs and cleaning of any kind, please contact
your local specialized service center.
Stop using the device if the lens fogs up. Do not wipe the lens! Remove moisture with a hair dryer or point the
telescope downward until the moisture naturally evaporates.
Protect the device from sudden impact and excessive mechanical force.
Do not touch the optical surfaces with your fingers. Clean the lens surface with compressed air or a soft lens cleaning
wipe. To clean the device exterior, use only the special cleaning wipes and special tools that are recommended for
cleaning the optics.
Store the device in a dry, cool place away from hazardous acids and other chemicals, away from heaters, open fire,
and other sources of high temperatures.
Replace the dust cap over the front end of the telescope whenever it is not in use. Always put eyepieces in protective
cases and cover them with caps. This prevents dust or dirt from settling on the mirror or lens surfaces.
Lubricate the mechanical components with metal and plastic connecting parts. Components to be lubricated:
Optical tube;
Fine mechanics (focuser rail, telescope optical tube microfocuser);
Mounting;
Worm-and-worm pairs, bearings, cogs, threaded mounting gears.
Use all-purpose silicon-based greases with an operating temperature range of –60 ... +180°С (–76 ... +356°F).
If a part of the device or battery is swallowed, seek medical attention immediately.
Children should use the device under adult supervision only.
Discovery
Spark 769 EQ
Newtonian reflector
Newtonian reflector
optical glass with
optical glass with
anti-reflective
coating
76
900
152
f/9
metal
EQ2
0.965"
aluminum,
670—1230mm
+
5x24, optical
4mm
12.5mm
20mm
2x
Discovery
Spark 114 EQ
Spark 709 EQ
optical glass with
anti-reflective
anti-reflective
coating
114
900
228
f/7.9
metal
EQ3
1.25"
aluminum,
610—1040mm
670—1230mm
+
6x30, optical
5x24, optical
10mm
25mm
2x
+
16
Discovery
Discovery
Spark 809 EQ
refractor
refractor
optical glass with
anti-reflective
coating
70
900
140
f/12.8
metal
EQ2
1.25"
aluminum,
aluminum,
670—1230mm
+
5x24, optical
4mm
12.5mm
12.5mm
20mm
90°
3x
1.5x
coating
80
900
160
f/11
metal
EQ1
0.965"
+
4mm
20mm
90°
3x
1.5x

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