HD Pentax-D FA 150-450mm F4.5-5.6 (APS-C)
Specifications
The Pentax-D FA 150-450mm lens has been designed for use will full-frame cameras, but it is of course also compatible with APS-C bodies, on which it provides a narrower field of view with better corner-to-corner performance. Its full specifications are listed in the table below.
| Engraved Name | HD Pentax-D FA 1:4-5.6 150-450mm ED DC AW |
| Optical Formula |  18 elements in 14 groups 1 Super ED, 3 ED |
| Image Circle | Full frame |
| Image Stabilization | No (in-body) |
| Auto-Exposure Support | Yes |
| Construction | All-metal barrel |
| Field of View (Diagonal) | 16.5 to 5.5° (Full frame) 10.7 to 3.6° (APS-C) |
| Aperture Range | F4.5 - F22 (150 to 300mm) F5.6 - F27 (300 to 450mm) |
| Aperture Blades | 9, rounded |
| Aperture Ring | No |
| Max. Magnification | 0.22x |
| Focus Type | Autofocus (DC only) |
| Quick Shift | Yes |
| Minimum Focusing Distance | 200 cm (6.6 ft) |
| Internal Focus | Yes |
| Filter Thread Diameter | 86mm |
| Cap | Dedicated pinch-type |
| Hood | Detachable bayonet hood PH-RBA86 (plastic) |
| Case | Included (HS120-270) |
| Diameter x Length | 95 x 241.5 mm (3.7 x 9.5 in.) at 150mm |
| Weight | 2000 g (70.5 oz.) w/o hood 2130 g (75.1 oz.) w/ hood 2325 g (82.0 oz.) w/ hood & tripod mount |
| Pentax Mount Designation | KAF3 |
| Weather Sealing | Yes |
| Price (MSRP) | $2499.95 £1999.00 2199.00€ |
| Launch Date | May 2015 |
| Origin | Assembled in Vietnam |
Note that firmware updates are required for the Pentax K-S1, K-S2, and K-3 for full compatibility and optimal focusing with this lens. Older cameras will not fully support all of lens's focusing features.
As the Pentax full-frame DSLR is not due for release until late 2015, the tests that follow over the course of the following pages were performed with current APS-C bodies.
