Description
ve 540mm f/6, this is the flattener that was designed for the job.
Tech Details:
| Model | Astro-Tech AT90FF |
| Optical Function | 1 field flattener (no focal reduction) |
| Telescope Compatibility | Astro-Tech AT90EDX and AT90CFT |
| Focal Length (with flattener) | 540mm (unchanged) |
| Focal Ratio (with flattener) | f/6 (unchanged) |
| Sensor Coverage | Full frame (3624mm) and smaller |
| Telescope Side Connection | M63 threaded (threads to focuser drawtube or Camera Angle Adjuster) |
| Camera Side Connection | 48mm T-threads |
| Back Focus | 55mm (flattener shoulder to sensor) |
| Filter Thread | 2″ (accessible by unscrewing top section) |
| Coatings | Fully multi-coated |
| Weight | 9.5 oz |
| Included Accessories | Threaded covers for both ends |
| Warranty | 1 year |
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