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The 0.6x reducer can bring the focal ratio of the Askar 103APO to F4, also providing field flattening. Askar 103APO adopts a detachable tube design, where the back of the tube can be removed when using the 0.6x reducer, allowing the telescope to have the length needed to achieve an F4 focal ratio.

The 0.8x reducer can bring the focal ratio of the Askar 140APO to F5.6. This is a standard gearbox with field flattening capability. A shorter focal ratio allows the OTA to have a wider field of view and faster exposure times, making it suitable for capturing large areas of nebulae, star clusters and faint, fast-moving celestial objects.

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.

The 0.8x reducer can lower the focal ratio of the Askar 185APO to F5.6. This is a standard gearbox with field flattening capability. A shorter focal ratio allows the OTA to have a wider field of view and faster exposure times, making it suitable for capturing large areas of nebulae, star clusters and faint, fast-moving celestial objects.