Detailed Assembly

No tools are required for assembly of your telescope.

Remove all components from the carton and identify all components. It is a good idea to lay all the parts out in front of you before assembly. Since your telescope is a precision optical system the parts require careful handling—particularly the onboard computer, telescope, eyepieces, and various accessory lenses.

SET UP TRIPOD AND ACCESSORY TRAY

1.Stand Northstar Computerized Star Locator Assembly and attached tripod legs in the upright position. Spread tripod legs to a comfortable distance.

2.Fold down the accessory tray braces and place the Quick Release Accessory Tray on top of braces. (See Quick Assembly Diagram)

3.Turn accessory tray until it snaps into place.

4.Adjust tripod leg height to suit by opening tripod leg lever and extending tripod legs to desired height. Clamp Tripod Leg lever closed when complete.

ATTACH TELESCOPE TUBE

1.Locate Main Telescope Tube.

2.Remove Telescope Tube Thumb Nuts from side of Telescope Tube. (See Quick Assembly Diagram)

3.Position Main Telescope Tube Attachment Bolts through Telescope Tube Bracket at the top of the Northstar Computerized Star Locator Assembly. Make sure the telescope is pointing in the correct direction. (Logo on telescope tube should be right-side up.)

4.Reattach Telescope Tube Thumb Nuts to Main Telescope Tube Attachment Bolts once Main Telescope Tube and Northstar Computerized Star Locator Assembly are assembled together.

ATTACH FINAL TELESCOPE ACCESSORIES

1.Locate Red Dot Finderscope.

For Reflector Telescopes: Remove Finderscope attachment nuts from Main Telescope Tube. Place Finderscope Assembly over Finderscope Attachment Bolts and reattach Finderscope thumb nuts to Finderscope Mount Bolts.

NOTE: The large end of the finderscope should face the open end of telescope tube.

2.Attach Low Power Eyepiece.

For Reflector Telescope Models: Insert lowest power eyepiece in the focusing mechanism by backing out eyepiece set screw and inserting eyepiece fully.

3.Tighten all set screws to secure accessories.

4.Remove Objective Dust Cover exposing entire diameter of open end of telescope.

SELECTING AN EYEPIECE

You should always start viewing with the lowest power eyepiece, which in this case is the 20 mm lens. Note: the base power of each eyepiece is determined by the focal length of the telescope objective lens. A formula can be used to determine the power of each eyepiece: telescope OBJECTIVE lens focal length divided by EYEPIECE focal length = MAGNIFICATION (e.g. Using the 20 mm lens, a sample calculation could look like this: 750 mm / 20 = 38x or 38 power. Telescope models will vary in focal length.)

Included with this telescope is a Barlow lens. Barlow lenses are used to double or triple the power of your telescope. Place your Barlow between the focusing tube and the eyepiece. Using the example above, your 3x Barlow lens would give you a total power of 114x or 114 power. (38 x 3 = 114x or 114 power). The magnification calculation would look like this: 750 mm /20mm = 38 power. 38 power x 3=114 power.

78-8830, 78-8845 specifications

The Bushnell 78-8830 and 78-8845 are two advanced models in the realm of outdoor optics, specifically designed for aficionados of birdwatching, nature observation, and sporting events. These binoculars blend high-quality optics with user-friendly features to provide an exceptional viewing experience.

One of the standout features of both models is their powerful magnification capabilities. The 78-8830 boasts an impressive 8x magnification, while the 78-8845 takes it up a notch with a robust 10x magnification. This increase facilitates a clearer and more detailed view of distant subjects, making them ideal for both general observation and specialized uses, such as wildlife watching or sporting events.

Optically, Bushnell binoculars are known for their quality glass, and these models are no exception. Both the 78-8830 and 78-8845 employ multi-coated optics, which enhance light transmission to deliver bright, clear images even in low-light conditions. They also feature high-quality, BaK-4 prisms that contribute to improved image clarity and brightness, yielding vivid colors and sharp contrasts.

In terms of ergonomics, Bushnell has ensured that both models are designed for comfort and ease of use. With a lightweight and compact body, they are easy to carry on extended journeys. Additionally, the rubberized armor provides a secure grip while also safeguarding the binoculars from shock and minor impacts. This rugged construction is paired with a waterproof and fog-proof design, making them suitable for various weather conditions, ensuring durability during outdoor adventures.

Bushnell has also integrated modern technology into these models. Users will appreciate the smooth focusing mechanism, allowing for quick adjustments for sharp images without missing critical moments. The large, easy-to-turn focus knob enables fast and precise focusing, which is especially important when observing fast-moving wildlife or action-packed sports scenes.

Furthermore, the 78-8845 features a wider field of view compared to the 78-8830, which enhances the ease of tracking moving objects. This is particularly beneficial for birding and watching sports, allowing users to scan a broader area without losing sight of the subject they are observing.

In summary, the Bushnell 78-8830 and 78-8845 are commendable choices for outdoor enthusiasts seeking high-performance binoculars. With powerful magnification, superior optics, robust construction, and user-friendly features, these models represent a significant investment for anyone serious about outdoor observation. Whether it’s for birdwatching, attending sporting events, or simply enjoying nature, these binoculars deliver the quality and performance needed to enhance the viewing experience.