Telescope 100mm Aperture 900mm Focal Length with Star-Finding System

The 100mm Aperture Telescope with 900mm Focal Length and Star-Finding System is an optical telescope designed for observing celestial objects through a combination of a 100mm aperture and 900mm focal length. Its star-finding system is intended to assist with locating objects in the night sky, while the 100mm objective aperture provides the primary light-gathering opening of the optical system. This telescope is suited to users interested in astronomical observation who want a setup with a relatively long focal length and an integrated system for helping locate targets. The exact optical configuration, magnification, mount type, eyepieces and star-finding technology should be confirmed from the specific model supplied.

Product Features

100mm Aperture

The telescope has a 100mm aperture, referring to the diameter of its primary optical opening. Aperture is an important telescope specification because it determines how much light the optical system can collect and contributes to the level of detail that can be observed.

900mm Focal Length

The telescope has a 900mm focal length. Focal length affects the optical characteristics of the telescope and, together with the eyepiece being used, determines the resulting magnification.

For example, an eyepiece’s magnification is calculated by dividing the telescope’s focal length by the eyepiece focal length. The actual magnification therefore depends on the eyepiece supplied or selected.

Star-Finding System

The telescope includes a star-finding system designed to help the user locate celestial targets. A finder is used alongside the main optical tube to make it easier to point the telescope toward the desired area of the sky.

The exact type of finder system should be confirmed from the specific telescope model.

Designed for Astronomical Observation

The telescope is intended for observing objects in the night sky. The combination of its aperture and focal length provides the basic optical configuration for astronomical viewing.

Long-Focal-Length Optical Configuration

With a 900mm focal length, the telescope is configured around a relatively long optical path. The resulting viewing characteristics depend on the eyepiece used, the atmospheric conditions and the object being observed.

Adjustable Magnification Through Eyepieces

Telescope magnification is not fixed by the telescope alone. Different eyepieces produce different magnifications.

With a 900mm focal length, for example, a 25mm eyepiece would produce 36x magnification, while a 10mm eyepiece would produce 90x. These are mathematical examples rather than a statement about which eyepieces are included with this product.

Suitable for Sky Observation

The telescope can be used for observing suitable celestial targets visible from the observer’s location and under appropriate viewing conditions.

Actual visibility and image quality depend on factors such as atmospheric conditions, light pollution, target position and the optical accessories being used.

Product Specifications

• Product type: Astronomical telescope
• Aperture: 100 mm
• Focal length: 900 mm
• Star-finding system: Included
• Primary application: Astronomical observation
• Optical magnification: Dependent on eyepiece used
• Eyepiece specifications: Not provided
• Mount type: Not specified
• Tripod specifications: Not specified
• Finder type: Not specified
• Optical design: Not specified
• Maximum useful magnification: Not specified
• Dimensions: Not specified
• Weight: Not specified

Understanding the 100mm Aperture

The 100mm aperture is one of the most important specifications of this telescope. It refers to the diameter of the telescope’s primary light-collecting opening.

A larger aperture generally allows an optical telescope to collect more light, but aperture alone does not determine the quality of the final image. Optical quality, atmospheric conditions, focusing, eyepieces and the stability of the mounting system also affect the observing experience.

Understanding the 900mm Focal Length

The 900mm focal length describes the distance over which the telescope’s optical system brings incoming light toward focus.

The focal length is also important when calculating magnification. To calculate magnification:

Magnification = Telescope focal length ÷ Eyepiece focal length

With this telescope:

• 900mm ÷ 25mm = 36x
• 900mm ÷ 20mm = 45x
• 900mm ÷ 10mm = 90x

These calculations demonstrate how changing the eyepiece changes the magnification. They do not indicate which eyepieces are included with the telescope.

Using the Star-Finding System

Finding a particular object in the sky can be difficult when using the main telescope at higher magnification because the field of view becomes narrower.

The star-finding system provides a separate reference point that helps the user position the telescope toward the intended area before observing through the main optical system.

The exact operation depends on the finder supplied with the telescope.

Choosing Eyepieces for the Telescope

Because the telescope has a 900mm focal length, the eyepiece selected will directly affect the resulting magnification.

A longer focal-length eyepiece produces lower magnification, while a shorter focal-length eyepiece produces higher magnification.

When selecting additional eyepieces, consider the telescope’s optical specifications and the observing conditions rather than assuming that the highest possible magnification will always produce the best view.

What Can You Observe?

The telescope is intended for astronomical observation, but what you can see depends on several factors.

These include:

• Aperture
• Magnification
• Eyepiece selection
• Atmospheric conditions
• Light pollution
• Target brightness
• Target position in the sky
• Optical alignment and focusing

The telescope should therefore be evaluated as a complete optical system rather than based on aperture or magnification alone.

Why Choose a 100mm 900mm Telescope?

The 100mm aperture and 900mm focal length provide a clearly defined optical configuration for users looking for an astronomical telescope with a longer focal length and a star-finding system.

At Zeneric Networks Limited, we recommend checking the exact telescope configuration, including the supplied eyepieces, finder system, mount and tripod, before purchasing. This ensures that the equipment matches your intended observing requirements.

Contact Zeneric Networks Limited for the 100mm Aperture 900mm Focal Length Telescope, current pricing and availability.