CELESTRON 71262 PORRO PRISM Binocular Instruction Manual
- June 6, 2024
- Celestron
Table of Contents
CELESTRON 71262 PORRO PRISM Binocular
Thank you for purchasing this Celestron Royal Observatory Greenwich binocular. We hope you will have many years of enjoyment with it. To maximize your enjoyment of this binocular, please read these instructions before using it.
Adjusting the Interpupillary Distance (IPD)
Since the distance between the eyes (specifically, the distance between the centers of the pupils) varies among individuals, the two eyepieces of the binoculars must be correctly aligned (adjusted). This is called adjusting the interpupillary distance. To adjust this distance, lift the binoculars up to your eyes (using both hands) and look through them at an object in the distance. Move the two halves of the binoculars about the hinge until you see one clear circle of image through both eyes.
Adjusting the Diopter
Since most people have a variance of vision from their left eye to their right
eye, you must adjust the focusing system. Use the following steps to achieve
focus: (1) Close your right eye and look through the left side of the
binoculars with your left eye at the subject matter. Rotate the center
focusing wheel until the image appears in sharp focus; (2) Close your left eye
and look through the right eyepiece (called the diopter). Rotate the right
eyepiece until the image appears in sharp focus; (3) Now look through both
eyepieces with both eyes open. Since you’ve already adjusted the right
eyepiece, use only the center focusing wheel to refocus on a new object at a
different distance.
Note: If your binocular has a diopter indicator, please note the setting
for later use for faster focus adjustment.
Hint: Eyeglasses worn for nearsightedness should be worn when using binoculars as you may not be able to reach a sharp focus at infinity without them.
Set the Rubber Eyecups
Leave the Rubber Eyecups up if you do not wear eyeglasses but fold them down if you do wear eyeglasses to obtain the maximum field of view. When done observing, fold the eyecups up for storage.
Tripod Adaptability
Porro Prism binoculars feature a built-in tripod adapter fitting. On these models, a threaded screw hole is underneath a cap. To attach a binocular tripod adapter, remove the cap and then thread the screw from the binocular tripod adapter into the threaded screw hole. The other end of the binocular tripod adapter attaches to a photographic tripod. Mounting binoculars this way allows for added stability and comfort, especially when viewing at high powers.
Care and Cleaning
Binoculars do not need routine maintenance other than making sure that the objective lenses and eyepieces are kept clean. If repairs become necessary, they should be serviced by the manufacturer. Collimation (optical alignment) is the biggest concern with binoculars. If your binoculars are roughly handled or dropped, there is a good chance that the collimation will be out and they should be serviced. Dirty objectives and/or eyepieces mean less light transmission and loss of brightness as well as unsharp images. Keep your optics clean! When not using your binoculars, store them in the case provided. Avoid touching the glass surfaces. If fingerprints (which contain mild acid) get on them, they should be cleaned as soon as possible to avoid damaging the coatings. To clean the optical surfaces, we recommend a lens/optics cleaning kit available at most photo or optical shops. Follow the instructions provided closely. If you have a lot of dust or dirt accumulated, brush it off gently with a camel’s hair brush and/or utilize a can of pressurized air before using the cleaning kit. Never attempt to clean your binoculars internally or try to take them apart!
Caution!
Viewing the sun may cause permanent eye damage. Do not view the sun with your binoculars or with the naked eye.
Problems or Repair
If warranty problems arise or repairs are necessary, contact the Celestron technical support department if you live in the U.S.A. or Canada. If you live elsewhere, please contact the Celestron dealer you purchased the binoculars from or the Celestron distributor in your country (listings on the Celestron website).
Warranty
Your binocular has the Limited Lifetime Warranty for U.S.A. and Canadian
customers. For complete details of eligibility and for warranty information
for customers in other countries, visit the Celestron
website:celestron.com
This product is designed and intended for use by those 14 years of age and
older. Product design and specifications are subject to change without prior
notification.
For complete specifications and warranty information,
visit:celestron.com/support/warranties
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2835 Columbia Street · Torrance, CA 90503 USA · 10-21
Manufactured under licence from National Maritime Museum · Copyright © 2022 National Maritime Museum, Greenwich, London. All rights reserved.
Royal Observatory Greenwich is a registered trade mark of the National Maritime Museum used under licence.
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