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Telescope accessories > Prisms & Diagonal mirrors > Diagonal prisms > Celestron > Celestron zenith prism 90°, 1.25"
( 5 / 5 )
Product no.: 7987

zenith prism 90°, 1.25"

$ 42.90 incl. VAT, plus shipping costs
in stock
ready for shipping in 24 h + lead time
Express shipment possible for delivery tomorrow, 02.11.2024!

Product description

This Star Diagonal lets you view objects that are at a 90° angle from the direction the telescope is pointing, thereby allowing comfortable viewing when the telescope is pointed at, or near, the zenith (i.e. directly overhead). The resulting image is right side up, but will be reversed from left to right.

Specifications

Capacity


Viewing posture
90°
Connection (to the telescope)
1,25"
Coating of optical system
fully

Special features


Correction of vertically reversed image
yes
Correction of horizontally reversed image
-

General


Colour
black-silver
Type
Deviating optics
Type of build
Diagonal prism
Celestron zenith prism 90°, 1.25"

Customer reviews

A good zenith mirror, but not a prism

Review by J. K. on 11.04.2018 14:53:50

( 5 / 5 )

As of 2018 Celestron seems to have replaced the optical system of the diagonal with a mirror. It is a very decent mirror for the price. The body is of quite rugged plastic and the connectors are metal. The diagonal is well collimated and shows no distortions.

It is not a prism, though. Prisms can be preferable for planetary viewing with high f/ achromats, as they have high transmitivity (>99.5%) which is comparable to the best dielectrics, yet show no scattering.

Mirrors such as this are standard equipment in faster instruments. This is a nice, well built accessory.

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