Description Pentax of the anti-reflection technology revolution, HD coating Lens surface to form a special film, optical techniques for suppressing the reflection of light, it is coated. The coating not only reduce the loss of light, suppression of flare and ghost, also contribute to the correction of color balance and increase the performance of the lens. Coating on the design, is the film thickness is important. However, the thin film forming method according to the conventional vacuum vapor deposition is limited to the control of the film thickness and had caused the effect varies. HD coating, by its own thin film forming apparatus and process, the film thickness manufacturing error in conventional 1/3. Realizes the film thickness control approaching the theoretical value on the coating design, and has realized the low reflection of conventional ratio of 50% or less. The auto focus more convenient, quick-shift Focus System When you focus in auto focus, focus ring to operate in manual it is common to have been fixed. Quick Shift Focus system, because it does not focus ring is fixed even when such, can be fine-tuned. More than anything, When I turn the focus ring before releasing the shutter, to cool! HD PENTAX-DA Limited series and professional Ppoku, it has been installed in all lineup. And natural, and soft, lens that can be represented is beautiful blur I adopted a circular aperture in all lineup. To never point light source, such as illumination is unnatural form, I will be complemented the subject in a beautiful blur. In addition, it is possible to make the aperture blades and seven or nine odd configuration, anxious when you narrowed down abandon, and is suppressing the bleeding of streaky light.
Pentax 21 mm/F 3,2 HD DA AL LIMITED-21 mm Lens