The flattener is a lens that evens out the field, as this is slightly curved by the primary optics. This curvature causes stars that are imaged at the edge of the field of view to be less sharp. The flattener, also called a field flattener, corrects this effect. Astrophotographers can then enjoy images where the stars remain sharp right out to the edge of the exposure. The flattener is installed between the telescope and the camera.
The 3-lens reducer and flattener is designed for apochromatic refractor telescopes. The corrector is suitable for almost all refractors with focusers from 2.5". The focal length is reduced to 74% and the light intensity is increased accordingly. At the same time, the image field is corrected. Now cameras with sensors up to full format can be used.
The most important advantages
- A new design solves the problem of tilting.
- The corrector can be used on all refractors with focusers from 2.5". The required back focus is 180 mm from the connection thread. Suitable adapters via M68 are available.
- The working distance from the M48x0.75 thread is 55 mm. Ideal for astro cameras and DSLR/SLR cameras.
- The corrector offers you another thread on the camera side, which you can use to extend the working distance to 105 mm.
- The corrector fits all focusers with an M68x1 internal thread. Transition adapters, e.g. to M63x1, are of course available. The prerequisite is the appropriate working distance.
From a focal length of 700 mm, the following working distances from the corrector to the camera apply
- From the M48x0.75 external thread: 55 mm
- For apochromats with a focal length of 600 mm to 700 mm, the working distance is extended by 1 mm.
- For apochromats with a focal length of 550 mm to 690 mm, the working distance is extended by 3 mm.
- For apochromats with a focal length of 480 mm to 540 mm, the working distance is extended by 5 mm.
TS Optics is a brand of Teleskop-Service.
