Askar 185APO 1.0× Flattener This 1× flattener is designed specifically for the Askar 185APO. Its triplet design corrects the photographic field across a 44 mm full-frame image circle. With the matched telescope, Askar publishes 1295mm focal length and f/7.
Manufacturer model: Askar 185APO 1.0× Flattener · Specifications checked against manufacturer data on 2026-11-04
This 1× flattener is designed specifically for the Askar 185APO. Its triplet design corrects the photographic field across a 44 mm full-frame image circle. With the matched telescope, Askar publishes 1295mm focal length and f/7.
Optical configuration
The 1× design retains the telescope’s native focal length and focal ratio while correcting field curvature and coma towards the edge of the image.
Connections and filters
The telescope-side connection is M92×1. Supplied camera-side interfaces are M68×1, M54×0.75 and M48×0.75. An internal M48×0.75 thread accepts a 2-inch filter.
Sensor spacing
Set 55 mm from the base of the M48 male thread to the sensor. This reference applies to the stated M48 camera arrangement; changing the adapter changes the reference face. Include all intervening adapters and optical components when arranging the train.
Construction and storage
The CNC-machined housing has threaded metal caps at both ends for dust protection during storage. The manufacturer technical table lists a weight of 0.74kg. Telescope, camera and filters are separate equipment.
Only the matched Askar 185APO configuration is verified. 55 mm backfocus is measured from the M48 male thread base. Manufacturer table weight is 0.74 kg; introduction says 0.79 kg. The technical table value is used.
Askar 185APO 1.0× Flattener This 1× flattener is designed specifically for the Askar 185APO. Its triplet design corrects the photographic field across a 44 mm full-frame image circle. With the matched telescope, Askar publishes 1295mm focal length and f/7.
Manufacturer model: Askar 185APO 1.0× Flattener · Specifications checked against manufacturer data on 2026-11-04
