HD Pentax-D FA 28-105mm F3.5-5.6 ED DC WR
Specifications
The D FA 28-105mm zoom includes some of Pentax's latest lens technologies, including HD coating, silent DC autofocus, weather sealing, a rear-mounted focus ring, Quick Shift full-time manual focus override, and rounded aperture blades.
This lens can be used on both full-frame and APS-C DSLRs. Full specifications follow:
Engraved Name | HD Pentax-D FA 1:3.5-5.6 28-105mm ED DC WR |
Optical Formula | 15 elements in 11 groups |
Lens Coating | Pentax HD coating SP (front element) |
Image Circle | Full frame / 35mm film |
Image Stabilization | Supports in-camera SR |
Auto-Exposure Support | Yes |
Construction | Plastic with rubberized grip |
Field of View (Diagonal/Horizontal) | Full frame: 75-23.5 ° / 65-19 ° APS-C: 53-15.5 ° / 46-13 ° |
Aperture Range | F3.5-22 (28mm) F4-29 (29mm-49mm)* F4.5-32 (50mm-84mm)* F5.6-38 (85mm-105mm)* |
Aperture Blades | 9 (rounded) |
Aperture Ring | N/A |
Max. Magnification | 0.22x |
Minimum Focusing Distance | 50cm |
Autofocus Type | DC in-lens motor |
Manual Focus Type | Mechanical clutch |
Quick Shift | Yes |
Distance Scale | No |
Internal Focus | Yes |
Filter Thread Diameter | 62mm |
Cap | O-LC62 (included) |
Hood | PH-RBC62 (included) |
Case | S80-120 (not included) |
Diameter x Length | 73 x 86.5 mm (2.9 x 3.4 in.) |
Weight | 440g (15.5 oz.) |
Pentax Mount Designation | KAF3 Autofocus support on K10D (2007) and newer |
Weather Sealing | Yes |
Price (US MSRP) | $499 USD |
Launch Date | 02/18/2016 |
Origin | Made in Vietnam |
*Measured empirically
Interestingly, unlike other recent Pentax lenses, the 28-105mm is labeled "Made in Vietnam" rather than "Assembled in Vietnam".
Film SLR Compatibility
This lens can be mounted on any Pentax K-mount camera, old or new. But like other modern lenses, the D FA 28-105mm lacks an aperture ring since the aperture setting is controlled digitally these days.
Although the lens is compatible with film SLRs, it will be limited to manual focus, and it minimally requires an A-series body such as the Super Program for proper aperture control. On older bodies such as the K1000 or ME, the lens will always shoot at the smallest aperture, which makes it more or less useless.
Terminology
- HD: High Definition coating with lower reflectance compared to standard SMC coating
- SP: Super Protect coating applied to the front element to repel dust and sand
- ED: Extra-low Dispersion elements to reduce aberrations
- WR: Weather Resistant moisture protection
- DC: Direct Current AF motor, a very reliable technology compared to early Pentax motors
- [IF]: Internal Focusing; the lens does not extend while focusing
Next, let's take a look at what's in the box.