Pentax D HD FA 645 35mm F3 5 AL IF Análisis | 54 Datos comparados

The PCMag review for the Pentax HD D FA 645 35mm F3.5 highlights the lens as a light, compact, and exceptionally sharp wide-angle option for Pentax medium format cameras. Delivering a 28mm-equivalent field of view, it excels in landscape photography, offering edge-to-edge sharpness, a push-pull focus clutch, and close-focusing capabilities. However, the lens exhibits noticeable barrel distortion and vignetting at wide apertures, along with a loud,, noisy autofocus motor, according to the review. Furthermore, despite its premium price point, the lens notably lacks weather sealing, making it vulnerable during outdoor use.

The HD Pentax-D FA 645 35mm F3.5 AL [IF] is a high-performance, wide-angle prime lens designed for medium format digital cameras, offering exceptional sharpness from center to corner even at f/3.5. Its advanced HD coating significantly reduces flare and ghosting, while rounded aperture blades deliver smooth, clean bokeh, making it a superior choice for high-resolution cameras. Conversely, the lens uses a loud and relatively slow, screw-driven autofocus system, and it lacks a hard infinity focus stop, which can be challenging for some, but not all, photographers. Additionally, the lens requires large, expensive 82mm filters, and its premium pricing reflects the specialized, high-end medium format market it serves.

The Pentax HD D FA 645 35mm F3.5 is a sharp, wide-angle prime lens designed for the Pentax 645D and 645Z medium format camera systems. Priced at $1,599, it provides a field of view equivalent to a 28mm lens on a full-frame 35mm camera, making it highly suitable for landscape photographers who require crisp, edge-to-edge detail. Lab testing via Imatest reveals excellent resolution starting at f/3.5, which peaks significantly at f/8, though image quality noticeably degrades past f/11 due to diffraction. The physical design features a metal barrel with an aperture ring and a knurled rubber focus ring that functions as a manual/autofocus clutch system. Furthermore, it offers impressive close-focus capabilities down to 11.8 inches, projecting subjects at one-quarter life size. The lens boasts several distinct pros and cons that buyers should weigh carefully. On the positive side, its optics deliver exceptionally crisp images from edge to edge, and the focus clutch system makes toggling focus modes highly efficient. It is also remarkably light and compact at 1.3 pounds and 3.5 by 3.5 inches, making it downright svelte compared to...