Telescopes with Apertures Under 80mm

Shopping for Beginner Telescopes By Aperture

Telescopes with apertures of less than 80 mm

Most of the telescopes with apertures smaller than 80 mm are refractor telescopes. Practically all of these beginner telescope kits, whether refractor or reflector telescopes, come with alt-azimuth mounts. Telescopes falling within this aperture range and fitted with AZ mounts are great beginner telescopes for children due to their low maintenance and ease of use.

Refractors are recommended for young children for viewing the moon and planets such as Jupiter, Saturn, Mars and Venus. Older children may opt for the reflector tube and learn how to collimate it.

Below are telescopes with apertures ranging from 50mm to below 80mm. There is a computerized model to consider. If you want some corporate gift ideas, you may consider the decorative telescopes which make excellent gifts and will look elegant on any desktops.

Browse and compare all the starter telescopes below, especially for other features such as their focal length, field of view and the quality of their optics.

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NASA Image Of The Day

Snapshot of the International Space Station

On March 13, 2008, the International Space Station passed across the field-of-view of Germany's remote sensing satellite, TerraSAR-X, at a distance of 195 kilometers, or 122 miles, and at a relative speed of 34,540 kilometers per hour, or more than 22,000 mph. In contrast to optical cameras, radar does not 'see' surfaces. Instead, it is much more aware of the edges and corners which bounce back the microwave signal it transmits. Smooth surfaces such as those on the station's solar generators or the radiator panels used to dissipate excess heat, unless directly facing the radar antenna, tend to deflect rather than reflect the radar beam, causing these features to appear on the radar image as dark areas. The radar image of the station therefore looks like a dense collection of bright spots from which the outlines of the space station can be clearly identified. The central element on the station, to which all the modules are docked, has a grid structure that presents a multiplicity of reflecting surfaces to the radar beam, making it readily identifiable. This image has a resolution of about one meter (about 39 inches). In other words, objects can be depicted as discrete units--that is, shown separately--provided that they are at least one meter apart. If they are closer together than that, they tend to merge into a single block on a radar image. Since this image was taken, the station has expanded and is more than 90 percent complete, including a full complement of solar arrays. Image Credit: DLR
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Telescopes with Apertures Under 80mm

Shopping for Beginner Telescopes By Aperture

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