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Helios 9877 User Manual

Helios 9877
20 pages
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Astronomical
Telescope
User Guide
OPTICAL VISION LIMITED
www.opticalvision.co.uk
®
WARNING!!
Never point the telescope directly at or near the Sun at any time.
Observing the Sun, even for a fraction of a second, will result in
instant and ir reversible eye damage. Please ensure minors ar e
supervised by an adult conversant with this real danger when
using telescopes or binoculars.
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Helios 9877 Specifications

General IconGeneral
BrandHelios
Model9877
CategoryTelescope
LanguageEnglish

Summary

Types of Telescopes

Refractor Telescopes

Details the refractor telescope, its components, and optical characteristics.

Reflector Telescopes

Describes the reflector telescope, its design, and how it gathers light without chromatic aberration.

Catadioptric Telescopes

Explains catadioptric designs, combining reflecting and refracting elements for compactness and quality.

Telescope and Mount Assembly

Attaching the Finderscope

Aligning the Finderscope

Step-by-step guide to align the finderscope with the main telescope for accurate targeting.

Using Your Telescope

Alt-Azimuth Mounts

Explains the alt-azimuth mounting, a simple type of telescope mount with two axes: altitude and azimuth.

Equatorial Mounts

Details the equatorial mount, its alignment with Earth's axis, and benefits for tracking and astrophotography.

Equatorial Mount Setup

Polar Axis Alignment (Approximate)

Provides instructions for approximate polar axis alignment for equatorial mounts.

Polar Axis Alignment (Precise)

Guides users through precise polar axis alignment for accurate tracking and astrophotography.

Polar Axis Elevation Alignment

Details how to align the polar axis elevation (altitude) using a star for fine-tuning.

Polar Axis Azimuth Alignment

Explains azimuth alignment for the polar axis, adjusting north-south orientation for accurate tracking.

Calibrating Declination Circle

Describes how to calibrate the declination circle on an equatorial mount for precise coordinate indexing.

Using Setting Circles

Observing Tips

Getting to Know the Sky

Getting Started

Guidance on starting as an astronomer, suggesting library visits and local society involvement.

Joining the Dots for Constellations

Tips on recognizing constellations by connecting star patterns, like dot-to-dot puzzles.

Finding Your First Constellation

Advice on locating a prominent constellation like Orion as a starting point for sky observation.

Getting a Sense of Scale

Using hand spans to estimate angular sizes of celestial objects and constellations in the night sky.

Broadening Horizons

Encourages developing observational skills and appreciating telescope potential with practice and society help.

Streetlights and Light Pollution

Discusses the impact of light pollution and suggests solutions for better sky viewing.

Astrophotography Basics

Provides guidance on beginner astrophotography using a 35mm camera, lens, tripod, and cable release.

Cleaning Telescope Optics