English mount

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The English mount is a special design of the equatorial mount in which the right ascension axis is supported at two points. The declination axis intersects this axis between the two bearing points.

The height of the two bearing points above the surface of the earth is determined by the geographical position of the telescope.

In one version of the English mount, which is known as an English frame mount , the telescope hangs between two bars of a closed frame. This type of mount does not allow observation of objects near the polar.

The straight right ascension axis of the English mount largely avoids this problem, because the telescope is laterally offset on the right ascension axis. With this arrangement, however, a counterweight is necessary on the other side of the right ascension axis. The bearing point of the right ascension axis, which is higher depending on the geographical latitude, is usually arranged on a bent column so that the telescope can be rotated a full 360 °. This pillar hinders the observation of near-polar regions at least temporarily.