Star Diagonal 31.7mm fitting Prism.

Standard accuracy

Price:   £35.00

Star Diagonal 31.7mm fitting Mirror.
Features Hi-Lux - click logo for more . . .

1/10 th PV surface accuracy

Price:   £95.00

Star Diagonal 50.8mm fitting Mirror.

Standard accuracy

Price:   £85.00

2" (50.8mm) Dielectric Star Diagonal
 

The body is an all metal (aluminum) construction. Use with standard 2" focusers on any telescope with sufficient focus travel, like most Refractors and Maksutov-Cassegrains. The 2" barrel with 48mm thread, fits most brands of 2" filters.

Price:   £165.00

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Nebula

A term used to describe celestial objects which have a fuzzy, or nebulous, appearance (from the Latin for cloud.), such as gas, or dust, clouds.

Nova

An existing star which suddenly increases its brightness by more than 10 magnitudes and then slowly fades.

Opposition

A planet is "in opposition" when it appears opposite the Sun in the sky. For the outer planets, this is generally the closest they come to the Earth, and when they are most easily visible.

Zenith

The point on the celestial sphere directly above the observer, or the highest point in the sky reached by a celestial body.

Granulation

The mottled appearance of the Sun's surface, caused by convection within the Sun.