Glossary | Telescope accessories | Capacity | Type
Protects the front surface of the telescope from condensation.
A prism at 45° or 90°, which produces an upright and right-sided image for refractor, SC, and Mak telescopes.
Extends the focal length and thus increases the magnification of a telescope. Is seated between the telescope and eyepiece or camera.
This accessory makes observation with both eyes possible.
Nebula filters that allow a very wide range of the spectrum through, but block stray light and certain wavelengths associated with artificial (neon) light. They are also used for photography at dark sky sites.
Colour filters are used for observing planets. Surface details, bands of clouds and other phenomena become more easily visible.
A weight used for balancing the declination or ascension axes.
A deflecting mirror connected to a focuser, which deflects the image upwards by 90°. This makes observing more comfortable.
Motorised tracking especially for Dobsonian telescopes.
An erecting lens corrects the image for nature observing and extends the focal length by a small amount.
A filter wheel provides space for several filters, which can be easily selected via a rotary function. This eliminates the need for time consuming filter changes.
Reduces the focal length of the telescope.
Also known as a neutral density filter. For reducing the glare from bright light sources such as the Moon, Jupiter and Venus.
Filters light through thin layers and allows it to pass only at certain wavelengths.
Adjusting lasers serve to collimate a Newtonian telescope.
A moon filter reduces the bright light of the moon and protects against glare.
A nebula filter for larger telescopes and as a supplement to the UHC filter. OIII filters are suitable for planetary nebulae and supernova remnants.
Linear polarising filters reduce the light and let it through in one direction only, for example vertically. Double polarising filters can be rotated against one other. As a result, the filter can be infinitely adjusted from light to dark.
The Herschel wedge deflects 96% of the sunlight away from the light path and allows only 4% of the light to pass through. Additionally, an ND3 grey filter, a UV/IR blocking filter and a solar continuum filter are also required for observing.
An adapter with an integrated T2 thread. This is a standard thread for which there are many appropriate accessories.
A nebula filter is mainly suitable for visual observing and for smaller telescopes. It increases the visibility of hydrogen bands and planetary nebulae.
A filter wheel that can be connected to a PC via USB and controlled electronically.
Stable support pads for the tripod. Ideal for vibrating surfaces such as a patio with a timber floor.