Celestron UpClose G2 10x25mm Roof Monocular User Guide
Learn how to set up, adjust focus, and maintain your Celestron UpClose G2 10x25mm roof monocular for optimal viewing performance.
Table of contents
Product Overview
The Celestron UpClose G2 10x25mm roof monocular is a compact optical device designed for clear, magnified viewing. It is intended for users aged 14 and older. The device features a rubber eyecup for comfort and a focus wheel to ensure sharp imagery.

Setting Up the Eyecup
To achieve the maximum field of view, the rubber eyecup should be adjusted based on whether you wear eyeglasses. If you do not wear glasses, fold the eyecup up. If you do wear glasses, fold the eyecup down to ensure proper eye relief.
Adjusting Focus
To obtain a sharp image, rotate the eyepiece until the view is clear. If you wear eyeglasses for nearsightedness, keep them on while using the monocular to ensure you can achieve a sharp focus at infinity.
Care and Maintenance
Handle the monocular with care to prevent the optics from becoming misaligned. When not in use, store the device in the provided soft case. Routine maintenance is minimal, focusing primarily on keeping the objective lens and eyepiece clean. Avoid touching the glass surfaces, as fingerprints contain mild acids that can damage optical coatings. If the lenses become dirty, use a high-quality lens cleaning kit, such as the Celestron Lens Cleaning Kit (#93576). Never attempt to disassemble or clean the interior of the monocular.
Safety Warnings
Solar Warning: Never attempt to view the Sun through any optical device without a proper solar filter, as this can cause permanent eye damage.
Technical Support
For further assistance or warranty information, visit the official Celestron website at celestron.com/pages/technical-support or celestron.com/pages/warranty.
Official resources from the manual
Manufacturer information
Celestron
Practical help
Common problems
Clean the objective lens and eyepiece using a high-quality lens cleaning kit to remove dust or fingerprints.
If you are nearsighted, ensure you are wearing your eyeglasses while using the monocular.
This is usually caused by dropping or mishandling the device. Contact Celestron technical support for repair options.
Before use
- Check if you need to fold the rubber eyecup up or down based on whether you wear glasses.
- Ensure the objective lens and eyepiece are clean.
- Verify you have the provided soft case for storage.
- Confirm you are not attempting to view the sun without a solar filter.
Images and diagrams
- The objective lens is located at the front of the monocular.
- The eyepiece and focus wheel are located at the rear of the monocular.
Model compatibility
- Designed for users 14 years of age and older.
- Compatible with eyeglasses; fold eyecup down for use with glasses.
Manual page author
Michael Turner
Technical manual editor
Reviews PDF manuals for structure, safety notes, and practical product details so readers can find the right information quickly.