An air-spaced ED triplet APO lens in a collimatable cell gives a sharp, high resolution image with great colour correction and contrast due to the FPL-53 Extra Dispersion lens element. The lens cell has multicoatings on all surfaces to increase light transmission.

This 8" optical tube is a very fast focal ratio f/4 reflector that has been mechanically and optically designed for wide field deep space imaging. It can be used with DSLR's, web cams and CCD cameras.

This 8" optical tube is a very fast focal ratio f/4 reflector that has been mechanically and optically designed for wide field deep space imaging. It can be used with DSLR's, web cams and CCD cameras.

This is a deluxe version of the 10" F8 GSO / Astrotech / Orion Ritchey-Chrétien with the New 3" Linear Bearing Focuser included as standard.

This is a deluxe version of the 10" F8 GSO / Astrotech / Orion Ritchey-Chrétien with the Genuine 3" Starlight Feathertouch dual speed focuser as standard.

The Rumak optical design allows a higher quality instrument with excellent field correction and very smooth optical surfaces to be made at an excellent price vs. performance point. The secondary mirror of a Rumak telescope has a different and precisely figured curvature to the front corrector plate it's mounted on - this is unlike normal Maksutovs which use a silvered spot on the back of the meniscus to reduce manufacturing costs.

This is a "deluxe" version of the tried and tested 8" GSO / Orion / Astro Tech F8 Ritchey-Chrétien and 2" dual speed linear bearing focuser.

This is a "deluxe" version of the tried and tested 8" GSO / Orion / Astro Tech F8 Ritchey-Chrétien and Genuine 2" Starlight Feather Touch dual speed focuser.

As with most of the APM telescopes these instruments were formerly known under the TMB brand.