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 field flattener for the compact Evoguide 50 ED mini telescope is designed for formats up to APS-C (28mm diagonal). It makes high quality astrophotography possible with a very compact and lightweight telescope. It screws on replacing the 50 ED extension sleeve and lets you use a camera with a T2 threaded connection.
It also has a connection for 1.25" receptacles with two clamping screws on the rear side. A back focus of 17.5mm makes it suitable for most guiding and astro cameras. It is also a perfect choice for travelling in combination with a small photo mount!
The flattener comes with two high-quality anodised aluminium caps. It contains two multi-coated lenses.
