Newtonians free#

Of course you can also get other positions if you want, i.e. The focus positions are calculated and achieved by changing the primary mirrors position. The 2' Paracorr VIP-2010 also works fine with this focus position. For this telescope line, we recommend the 58 mm secondary mirror. We recommend that version for visual use of the telescope. This version is also suited for the GPU corrector, which may not put completely into the focuser. The reducer brings the system up from f/5 to f/3.6. This position is ideal for the use of the ASA Reducer/corrector ASA2KORRR.

Astrophotographic use with the ASA 2' Reducer/corrector - 90 mm above the 2' tube.

For visual use, you need to add the 2' extension tube. This version is optimized for the standard correctors like the TS coma corrector, the Baader MPCC or the ASA Quattro.

Astrophotography with the standard coma correctors - 65 mm above the 2' tube (STANDARD Version).

Three possible focus positions above the 2' tube of the focuser With very precise 3' compression ring clamping - as good as screwed adaptions. THE high-end focuser for Newtonian telescopes and real 3' correctors from TeleVue, ASA or TS Optics.

Starlight FTF3215B-A TRUE 3' Feather Touch Focuser.

These correctors are screwed to the M82 thread of the focuser. The massive 3' focuser is our recommendation for astrophotographers who want to work with a 3' Newtonian corrector.

Orion ACU-3S 3' Crayford focuser with M82x1 thread.

The focuser offers, besides 2' receptacle, also a screwed M68x1 connection. It is ideally suitable for long 2' correctors or for the 2.5' Wynne corrector.

The 2.5' Moonlite focuser is especially precise and perfectly suited for heavy cameras. MoonLite 2.5' Newtonian focuser with 360° rotation.In addition, the focuser is very short, together with the base, it is only 50 mm high. Starlight Feather Touch 2' focuser - 20 mm draw tube travelĢ' focuser for maximal stability without compromises.The short focuser needs only 75 mm optical path. TS 2' UNC Newtonian Crayford focuser - shortĮconomically priced 2' Crayford focuser for observing and photography with DSLR cameras.Please do not forget to select the base for attaching the focuser to the tube. Thus you can easily adapt your new telescope optimally to your wishes.

Newtonians free#

The free choice of the focuser makes the ONTC Newtonians unique. It blackens the wall as good as velours, but has less weight and will not attract dust. We use Berger Antireflexfarbe (anti reflex paint) for the inner wall of the tubes. The tube offers three positions of the main mirror cell. One telescope, many focal distances - due to different correctors! The correctors need different focus positions above the focuser.The telescope can be collimated completely without tools. The mirror cells are manufactured in Germany, too.Fantastic temperature compensating performance - barely any temperature based focus drift.It is manufactured in a carbon/rigid foam sandwich construction for a perfect stability at an unbeatable weight ratio The edge of the secondary is blackened against reflexes and stray light.Also the functionality of the optical and mechanical components are tested before shipping the ONTC. Exchange of the secondary without problems - anytime.optimized configuration for astrophotographic or visual use by choosing different focusers, focus positions or secondary mirrors.

A good choose is the EQ8, if you want to mount the newtonian in an observatory. The Celestron CGEM-DX, Skywatcher AZ-EQ6 or Losmandy G-11 should be the minimum. We suggest a bigger mount if you have interest in Astrophotography. With suited correctors, the speed can be increased to f/3.8. Also the good valued 2-element correctors, like the Baader MPCC will offer good images with pinpoint stars to the edges. The exposure time is short and very expensive correctors are not needed. You will have an image similar to a 9' APO refractor.Īstrophotographers will enjoy the moderate speed of f/5. If you choose a secondary mirror with 74mm diameter (short axis) you will have only 24% obstruction. The visual and photographical performance on moon and planets is impressive. Tel.: 06835 / 923 949 -0 E-Mail: ONTC Newtonian with 303 mm aperture and 1500 mm focal length Please consult our sales department by phone or email We are happy to help you with the configuration and create a complete concept tailored to measure and according to your wishes. You choose the components and the bias of your telescope and get a Newtonian without compromises for reaching your astronomical goals. ONTC Newtonian Telescopes from Teleskop Service are a unique system on the market Product descriptionTS 12' f/5 ONTC Carbon Tube Newtonian telescope - fully customizable