The 1x flattener does not change the focal ratio of the telescope. After being attached to the Askar 103APO, it still maintained a focal length of f/6.8. The flattener corrects field curvature and coma, resulting in flatter field edges and finer star points.

The Askar 120APO's 120mm aperture provides undeniable advantages in light-gathering power, resolution, brightness and contrast, allowing you to capture more light and present more detail and brighter objects in your images. The increased aperture area, which is 36% larger than that of the 103APO, contributes to better performance.

The 1.0x flattener does not change the focal ratio of the telescope. After attaching it to the Askar 120APO, it maintained a focal ratio of 7. The reducer corrects field curvature and coma, resulting in flatter field edges and sharper star points.

The 1.0x flattener does not change the focal ratio of the telescope itself. After attaching it to the Askar 140APO, it still maintained a focal ratio of 7. The flattener corrects field curvature and coma, resulting in flatter field edges and finer star points.