The Askar 0.75x Reducer for 91F APO Telescope is an essential accessory for astrophotography. Firstly, it increases the focal ratio of the Askar 91F APO telescope to f/5, significantly reducing the time required for image capture. Secondly, it corrects optical aberrations at the edges of the image, ensuring perfectly pinpoint star images across the entire field of view during image capture.
The three-element reducer features a 44 mm image circle, making it fully suitable for use with full-frame cameras. On the camera side, M48 and M54 threads are available, allowing for wide compatibility with various systems. The product provides the classic 55 mm sensor distance.
Inside, a 2" filter thread is available.