HD Pentax-D FA 70-210mm F4 ED SDM WR
Specifications
The HD Pentax-D FA 70-210mm F4 ED SDM WR carries a long list of acronyms. Below is an explanation of various terms pertinent to this lens:
HD | "HD", is the name of the current most advanced coatings available for Pentax lenses. Building on the famous SMC coatings, it improves contrast and flare management. |
D FA | "D FA" refers to a lens designed for full frame digital cameras. The lens carries information used for specific program lines, in-camera lens corrections, and so forth. It is also fully usable with APS-C sensors. |
F | "F" is the maximum aperture of the lens, 4 in this case. |
ED | "ED" means that the lens uses extra low dispersion elements to improve optical performances. |
SDM | "SDM" means Supersonic Direct-drive motor. As per RICOH the SDM autofocus motor in the 70-210mm is of a new generation. |
WR | "WR" means the the lens is weather resistant. It cannot be submerged but will resist splashes, rain, snow, dust, and other adverse conditions. |
SP | "SP" is not part of the lens name, but still an important part of its characteristics. Super Protect is a type of coating used by Pentax that helps repel dust and grease on the front element, making the lens easier to clean. |
Below are the lens specifications.
Lens Name | HD Pentax-D FA 70-210mm F4 ED SDM WR |
Optical Formula | 20 elements in 14 groups (three ED element) |
Image Circle | 35mm (Full frame) |
Auto-Exposure Support | Yes |
Construction | Plastic |
Field of View | Diagonal / Horizontal APS-C: 23-7.7 ° / 19.5-6.5 ° |
Aperture Range | F4 - F32 |
Aperture Blades | 9 (rounded) |
Aperture Ring | No |
Max. Magnification | 0.32x |
Focus Type | AF, SDM, quick-shift, focus limiter |
Minimum Focusing Distance | 95 cm |
Internal Focus | Yes |
Filter Thread Diameter | 67mm |
Cap | Yes, clip-on |
Hood | Yes, bayonet (petal-shaped), PH-RBP67 |
Case | Optional, S100-200 |
Diameter x Length | 8.5 x 175 mm (3.1 x 6.9 inches) |
Weight | 819 g (hood : 40g) |
Pentax Mount Designation | KAF4 |
Weather Sealing | Yes |
Price (US MSRP) | |
Launch Date | 2020 |