
Astro-Physics 2.7" Prime Focus Field Flattener (67PF582)
The 2.7-inch Field Flattener can be coupled to a variety of different cameras for truly superb photographs or images with your Astro-Physics' StarFire refractor. The Astro-Physics' refractors which this adapter fits are: 140 mm f/7.5 StarFire EDF 130 mm f/8.35 StarFire EDT 155 mm f/7 StarFire EDFS Star 130ED Star 12ED 5-Inch f/8 StarFire 5-Inch f/8 Standard Each field flattener is designed for a particular focal length for optimal results. They are not interchangeable. The backfocus spacing for these flatteners (as measured from the rear flange) is 3.4-inches +/- 1/10-inch (86.4 mm +/- 2.5 mm). The bayonet male thread size at the rear is 3.725-inches x 24. Use the bayonet locking ring to secure your camera into position after you have framed your image. This allows you to rotate the camera to achieve your desired composition.