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Ra R72 ED Doublet Kit 82015
Инструкция к Levenhuk Ra R72 ED Doublet Kit Страница: 3

Levenhuk Ra R72 ED Doublet Kit 82015 Инструкция к Levenhuk Ra R72 ED Doublet Kit онлайн [3/28] 838550

Levenhuk Ra

R66 ED

Levenhuk Ra

R66 ED Carbon

Levenhuk Ra

R72 ED

Levenhuk Ra

R80 ED

Levenhuk Ra

R80 ED Carbon

Optical scheme apochromatic refractor

Optics material ED

Optics coating fully multi-coated

Aperture, mm 66 66 72 80 80

Focal length, mm 400 400 432 500 500

Focal ratio f/6 f/6 f/6 f/6.25 f/6.25

Highest practical power, x 132 132 144 160 160

Resolution threshold,

arcseconds

1.75 1.75 1.61 1.45 1.45

Focuser

1.25" dual-speed

Crayford

1.25" dual-speed

Crayford

2" dual-speed

Crayford

2" rack-and-pinion

dual speed focuser

2" dual-speed

Crayford

Optical tube material anodized aluminum carbon ber anodized aluminum anodized aluminum carbon ber

Tube-mount assembly system quick-release 1/4" thumbscrew

Aluminum case +

Cleaning wipe +

Protective cap 1pc for objective, 1pc for focuser

The manufacturer reserves the right to make changes to the product range and specications without prior notice.

Care and maintenance

Specications

• Never, under any circumstances, look directly at the Sun through this device without a special lter, 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 ngers. 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 re, 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.

Keep in mind that every telescope has a practical power limit of 1.5—2D (D is the aperture of the telescope in mm). At higher

powers, an image will always be dimmer and less sharp; the viewing conditions (the "seeing") may also aect the quality of

resulting images. It is recommended to begin observations at low magnications (longest focal length). After you have located

the desired object, you can try switching to a high-power eyepiece, if seeing conditions permit.

Astrophotography

Most CCD cameras have a 1.25" or 2" barrel. Simply insert the nosepiece of the CCD camera or the adapter into the focuser and

lock it place with two thumbscrews.

To attach a DSLR camera, you will need an appropriate T-ring and a camera adapter. Simply attach the T-ring to the camera body

and thread the camera adapter onto the T-ring. Insert the barrel of the camera adapter into the focuser and secure it in place

with two thumbscrews.

You may want to consider using a remote shutter release instead of the shutter release on the camera. Touching the camera may

shake the instrument and blur the resulting image. Also, make sure the tripod is steady.

Levenhuk Ra R72 ED Doublet Kit 82015 Инструкция к Levenhuk Ra R72 ED Doublet Kit онлайн [3/28] 838550

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