Astro-Physics 67PF79 2.7" Prime Focus Field Flattener

Astro-Physics 67PF79 2.7" Prime Focus Field Flattener

Our 2.7" Field Flattener can be coupled to a variety of different cameras for truly superb photographs or images with your StarFire refractor. Each field flattener is designed for a particular focal length for optimal results. They are not interchangeable. For those wishing to adapt the field flattener to other cameras, keep in mind that the film plane should be 3.4" from the surface of the bayonet flange closest to the camera, +-1/10". (86.4mm +/- 2.5 mm) This is true for all 2.7" and 4" field flatteners that we have produced except for the 160 Field Flattener (160FF) .
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.
Please choose the appropriate field flattener for your Astro-Physics refractor:
67PF462 - 105 Traveler
67PF562 - 130 StarFire EDFS, 130 StarFire EDF Gran Turismo
67PF582 - 140 f/7.5 StarFire EDF, 130 StarFire EDT, 155 StarFire EDFS, Star130ED, Star12ED, 5" f/8 StarFire, 5" f/8 Standard
67PF69 - 155 StarFire EDT, previous 6" f/9 and Star155ED
67PF79 - 180 StarFire EDT, 7" f/9 StarFire

Starting in August 2009, all 2.7" field flatteners are now shipped with machined aluminum covers for both sides of the unit. If you already own one of these flatteners and would like a set of covers, please refer to the cover set listed below.

Applications:
Pentax 6x7 Camera - Produces sharp star images over the entire 6x7 format of a Pentax camera at prime focus. Enlargements of 16"x20" are possible without fuzzy images or loss of detail. The adapter for this camera is already built into the field flattener. Click here to see a photo of the field flattener with our 2.7" focuser and Pentax 6x7.

Covered Field Flattener
35mm Camera or 35mm format DSLR - use 67RT-- adapters (specify the t-ring that you need) to interface with the field flattener for optimum results in 35mm film formats. Click here to see the field flattener with our 2.7" focuser and 35mm camera. For full frame Canon DSLR's, we also offer the Large 1.875" diameter SLR Adapter with Canon EOS Bayonet (67RLEOS) .

CCD Camera - Choose the appropriate adapter A1260, A1261 or A1262 to space the field flattener properly with your CCD camera. For STL Series cameras we also offer the ADA671 and ADA672 Adapters which couple directly to the STL's accessory block for an unvignetted light path.