F/7.7 CCD Field Flattener for 160 f/7.5 StarFire EDF (160FF)
Designed for: 160
mm f/7.5 StarFire EDF
Digital imaging with CCD and DSLR cameras.
Also suitable for video and 35mm film cameras.
The 160 f/7.7 Prime Focus Field Flattener
is made specifically for the 160 f/7.5 StarFire EDF with its 4" focuser.
The effective speed of the 160EDF will be f/7.7 when this Field Flattener
Correction is essentially diffraction-limited over a 76 mm (3")
circle, encompassing 3.5 degrees of sky. Stars will be pinpoint into
the extreme corners of the field.
Required for optimal performance:
- The distance from the field flattener to the focal plane is critical and
must be maintained +/- 2.5 mm. If you remove the extension piece, the
distance is 99.1 mm (3.9") from rear of housing to the focal plane;
plenty of room for rotators, filter wheels, etc.
The distance must be the OPTICAL distance - NOT the mechanical
distance. Please be sure that you have accounted for the indexing effects
of your filters, sensor cover slips and any other glass in the light
path. Please review the document "175 & 160
CCD Field Flattener Spacing Requirements" for more information.
Astro-Physics produces several
adapters (listed below). These
adapters, when used with their respective cameras, provide perfect spacing.
The special adapters for the STL cameras ensure minimal vignetting
of the corners of the format (vignetting is unavoidable in these cameras
due to the limitations of the filter size). Adapters for other cameras can
be custom ordered from PreciseParts.
The 160 CCD Field Flattener comes with beautifully machined anodized aluminum
covers: protection befitting the fine optics.
Chip not listed? The 160FF yields 2.791 arcminutes per mm of chip.
|Fully Illuminated Circle
||3.0" (76 mm)
||14.9 x 10 mm
||0.69 x 0.47 degrees
||18.0 x 13.5 mm
|| 0.84 x 0.63 degrees
||22.4 x 14.9 mm
||1.04 x 0.69 degrees
||36.9 x 36.9 mm
||1.71 x 1.71 degrees
|35 mm Full Frame
||36 x 24 mm
||1.68 x 1.12 degrees
|160FF||$1,150.00|| in stock||
Choose the Appropriate Adapter for Your Application
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This page was last modified:
November 8, 2016
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Phone: 815-282-1513 Fax: 815-282-9847