BRESSER 4920300 BinoViewer 1.25″ Instruction Manual

: June 6, 2024
: BRESSER

Table of Contents

Delivery content (Fig. 1)
Parts list (Fig. 2)
Features
Installing the BinoViewer
Inserting eyepieces* (Fig. 2a)
Focusing
Adjusting the interpupillary distance
Maintenance and Cleaning
Warranty and Service
Notes
Documents / Resources

BinoViewer 1.25″
Art. No. 4920300

BRESSER 4920300 BinoViewer

INSTRUCTION MANUAL

Visit our website via the following QR Code or web link to find further information on this product or the available translations of these instructions.

BRESSER 4920300 BinoViewer - QR CODE www.bresser.de/P4920300

Fig. 1

BRESSER 4920300 BinoViewer - FIG 1

*Eyepieces not included with purchase

General warnings!

Never look at or near the sun with the BinoViewer and/or a telescope. Serious eye damage or complete blindness will result!
Children must only use the device under adult supervision.
Always keep the BinoViewer covered when left outdoors in daylightunattended.

Delivery content (Fig. 1)

A BinoViewer B Hardcase

Parts list (Fig. 2)

1.25″ Eyepiece holder cap
Eyepiece twist lock
Right eyepiece holder
Left eyepiece holder
IPD scale
Diopter focusing ring
IPD adjustment casing (right and left part)
1.25″ Barrel
1.25″ Barrel cap

Features

Unique erecting optics
Fully multi-coating
Magnification 1:1
More comfortable observation
Adjustment of interpupillary distance (IPD): 58~74mm (2.28″~2.91”)
Adjustable diopter design (+ ◄ ► -)
Self-centering eyepiece holder with twist lock

Installing the BinoViewer

Remove 1.25″ Eyepiece holder caps (1) and 1.25” Barrel cap (9) before getting started to use the BinoViewer.
Mounting the BinoViewer on a telescope
2.1 Cassegrain or Refractor telescope
Adapt a non-inverting diagonal, like penta or half-pentaprism diagonal*, to the focuser of your telescope. Then insert 1.25” barrel (8) of the BinoViewer to the prism diagonal.
The image would be erected after adapting the eyepieces. You may use a mirror or roof prism diagonal, but the image would be upside down and it may be laterally inverted. Diagonal type| Image
---|---
No inverting diagonal, like penta or half-pentaprism diagonal| Erecting image
Mirror diagonal| Upside down and not laterally inverted
Roof prism diagonal| Upside down and laterally inverted

2.2 Newtonian Reflector telescope
The BinoViewer has a parfocal optical design.
Insert an eyepiece to the focuser/extension tube of your Newtonian telescope.
Turn the focus wheel of your telescope to get a clear and sharp image. Remove the eyepiece and insert the 1.25″ barrel (8) of the BinoViewer to the focuser/extension tube of the Newtonian telesccpe directly. The image would be erected after adapting the eyepieces*.

Inserting eyepieces* (Fig. 2a)

Insert 2 pieces of the same eyepiece* to the end of the right and left eyepiece holder (3/5).
Turn the eyepiece twist locks (2) to tighten the eyepieces.
Important: Make sure the eyepieces are firmly fixed. If the eyepieces are not firmly fixed, they may slip out of the eyepiece holders during observation.

Focusing

Look through the left eyepiece with the left eye.
Turn the focus wheel of your telescope to get a clear and sharp image.
Look through the right eyepiece* with the right eye.
Check whether the image you see is clear and sharp. If so, go ahead with chapter 7.
If the image is fuzzy, you may need to adjust the focus by turning the diopter focusing ring (6) until the right image becomes clear and sharp.

Note: The diopter focusing ring is marked with + ◄ ► – scale. This allows for a step-less diopter adjustment.

Adjusting the interpupillary distance

Look through both eyepieces* with both eyes.
Firmly hold the left and right parts of the IPD adjustment casing (7) and push together or pull apart the casing parts with light force. Doing so will merge two single images into one image.
Now you can enjoy your observations.
Note: Remember the number of the IPD scale for further observations.

Maintenance and Cleaning

Protect the device from dust and moisture.
After use, particularly in high humidity, let the device acclimatize for a short period of time so that the residual moisture can dissipate before storing.
Put on the covering caps and store it in the included hard case when not in use.
Store the device in the included hard case in a dry, dust-free place when it is not being used for a longer time.
Only use a dry cloth to clean the exterior of the device.
Clean the lenses only with a soft, lint-free cloth (e.g. microfibre cloth). To avoid scratching the lenses, use only gentle pressure with the cleaning cloth.
To remove dust from the lenses, use a fine brush or air blower. Don’t touch any optical surface with fingers – the coating may be damaged.

Disposal
Dispose of the packaging materials properly, according to their types, such as paper or cardboard. Contact your local waste disposal service or environmental authority for information on the proper disposal.

Warranty and Service

The regular warranty period is 5 years and begins on the date of purchase.
You can consult the full warranty terms as well as information on our service at www.bresser.de/warranty_terms.
Please contact one of our Service Teams around Europe first in any kind of service request (contact by email preferred). Our qualified personnel will be happy to help you. Find the complete list of all Service Teams on the last page.

Notes

Please contact the service centre first for any questions regarding the product or claims, preferably by e-mail.
E-Mail: service@bresseruk.com
*Telephone: +44 1342 837 098
BRESSER UK Ltd.*
Suite 3G, Eden House
Enterprise Way
Edenbridge, Kent TN8 6HF
United Kingdom
Number charged at local rates in the UK (the amount you will be charged per phone call will depend on the tariff of your phone provider); calls from abroad will involve higher costs.

Bresser GmbH
Gutenbergstraße 2
46414 Rhede · Germany
www.bresser.de

@BresserEurope