HD Pentax-DA645 28-45mm F4.5ED AW SR

The HD PENTAX DA645 28-45mm F4.5ED AW SR is an ultra-wide-angle zoom lens is the latest in the PENTAX 645 line-up and is engineered for use with PENTAX medium-format, digital SLR cameras. This new lens provides focal lengths from 22mm to 35.5mm in the 35mm format, and is the first ultra-wide-angle zoom lens (approximately 1.6X zoom ratio) designed for use with our medium-format digital cameras. Its optics consists of 17 elements in 12 groups, including two high-performance aspherical elements and two extra-low dispersion elements. In addition, the PENTAX-innovated SR (Shake Reduction) mechanism has been incorporated into this exceptional lens, which effectively compensates for camera shake up to approximately 3.5 shutter stops.


 

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HD Pentax-DA645 28-45mm F4.5ED AW SR Specifications


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Rounded blades
No
No
مشخصات اصلی
نوع لنز Prime lens
حداکثر اندازه قالب 645
فاصله کانونی 28–45 mm
سیستم تثبیت تصویر Yes (3.5 stops)
نوع سوار کننده لنز Pentax 645AF2
روزنه
حلقه تنظیم دیافراگم No
تعداد تیغه های دیافراگم 9
نورشناسی
تعداد المان ها 17
تعداد گروه ها 12
المان ها/ پوشش های ویژه HD and Aero Bright coatings
کانون
حداقل فاصله فوکوس 0.40 m (15.75)
حداکثر بزرگ نمایی 0.21×
فوکوس اتوماتیک Yes
فوکوس دستی دائمی Yes
نوع فوکوس Internal
مقیاس فاصله Yes
فیزیکی
وزن 1470 g (3.24 lb)
قطر 99 mm (3.9)
ارتفاع 152 mm (5.98)
جنس Metal
مقاوم سازی شده Yes
رنگ Black
روش زوم Rotary (internal)
درپوش لنز Yes
کد نوع درپوش 38709
سه پایه No
سایر مشخصات
موضوع فیلتر 82.0 mm

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