5
Specifications
150C Cassegrain OTA
Optical design
Cassegrain reflector
Optics material
quartz
Optics coating
SiO₂ (silicon dioxide) 92~96% coating
Primary mirror shape
paraboloid
Primary mirror diameter (aperture), mm / in
153 / 6
Secondary mirror shape
hyperboloid
Focal length, mm
1836
Focal ratio
f/12
Highest practical power, x
304
Resolution threshold, arcseconds
0.76
Limiting stellar magnitude
13.6
Drawtube travel
41mm (laser-engraved millimeter scale)
Baffles
8 internal knife-edge baffles
Backfocus distance
157.2mm (from end of 2" focuser collar)
Focuser
2'' dual-speed Crayford
Eyepiece barrel diameter
1.25/2''
Tube-mount assembly system
dovetail plate
Optical tube material
rolled steel
2" Extension ring
1pc
1" Extension ring
2pcs
Dust cover
1pc
Operating temperature range, °C / °F
−5… +35 / 23… 95
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 their protective
cases and cover them with their 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 the battery is swallowed, seek medical attention immediately.
•
Children should use the device under adult supervision only.
Levenhuk International Lifetime Warranty
All Levenhuk telescopes, microscopes, binoculars, and other optical products, except for their accessories, carry a
lifetime
warranty
against defects in materials and workmanship. A lifetime warranty is a guarantee on the lifetime of the product on the
market. All Levenhuk accessories are warranted to be free of defects in materials and workmanship for
six months
from the
purchase date. The warranty entitles you to the free repair or replacement of the Levenhuk product in any country where a
Levenhuk office is located if all the warranty conditions are met.
For further details, please visit: www.levenhuk.com/warranty
If warranty problems arise, or if you need assistance in using your product, contact the local Levenhuk branch.
