Пентак 21790

Pentax SMC DA* 55mm f/1.4 SDM Prime Standard Lens Instruction Manual

Модел: 21790

Увод

This manual provides essential information for the proper use and care of your Pentax SMC DA* 55mm f/1.4 SDM Prime Standard Lens. This high-performance lens is designed for Pentax Digital SLR Cameras, offering exceptional image quality with its advanced optical elements and coatings. It features a fast f/1.4 aperture, weather-resistant construction, and a Supersonic Direct-drive Motor (SDM) for quiet and precise autofocus.

Сетуп

Причвршћивање сочива

  1. Уверите се да су и камера и објектив искључени.
  2. Уклоните задњи поклопац објектива и поклопац кућишта камере.
  3. Align the red mounting index mark on the lens barrel with the corresponding mark on the camera body.
  4. Insert the lens into the camera's lens mount and rotate it clockwise until it clicks into place. Do not force the lens.

Одвајање сочива

  1. Уверите се да је камера искључена.
  2. Док држите притиском дугме за отпуштање објектива на кућишту фотоапарата, окрећите објектив у смеру супротном од казаљке на сату док се не заустави.
  3. Пажљиво уклоните објектив са тела фотоапарата.
  4. Attach the rear lens cap to the lens and the body cap to the camera to protect them from dust and damage.

Attaching the Lens Hood and Cap

The PH-RBH lens hood is designed to reduce flare and protect the front element. Align the hood with the front of the lens and twist until it locks securely. The O-LC58 objective cap protects the front element when the lens is not in use.

Pentax SMC DA* 55mm f/1.4 SDM Prime Standard Lens, angled view

Слика: Под углом view of the Pentax SMC DA* 55mm f/1.4 SDM lens, showing the focus ring, AF/MF switch, and distance scale.

Руковање објективом

Фокусирање

  • Аутофокус (AF): Set the AF/MF switch on the lens to 'AF'. The lens utilizes a Supersonic Direct-drive Motor (SDM) for quiet and fast autofocus.
  • Ручно фокусирање (MF): Set the AF/MF switch on the lens to 'MF'. Rotate the focus ring to adjust focus manually.
  • Quick-Shift Focus System: This system allows for instant switching between autofocus and manual focus without changing the AF/MF switch position on the lens, provided the camera body supports this feature. After autofocus has locked, you can fine-tune focus manually by rotating the focus ring.

Kontrola blende

The lens features a fast maximum aperture of f/1.4, allowing for excellent low-light performance and shallow depth-of-field effects. The aperture can be stopped down to f/22. The 9 rounded diaphragm blades contribute to a smooth, circular bokeh (background blur) at wider apertures. Aperture control is fully automatic and managed through the camera body.

Конструкција отпорна на временске услове

The lens is equipped with a water- and dust-resistant seal, providing reliable operation in challenging environmental conditions. While resistant, it is not waterproof; avoid submerging the lens in water.

Pentax SMC DA* 55mm f/1.4 SDM Prime Standard Lens, front view

Слика: Фронт view of the Pentax SMC DA* 55mm f/1.4 SDM lens, highlighting the distance scale and AF/MF switch.

Одржавање

Чишћење сочива

  • Елементи сочива: The objective lens surface is treated with Pentax's Super Protect (SP) coating, a fluorine compound that repels dust, water, and grease. For cleaning, use a soft, clean lens cloth. For stubborn smudges, use a specialized lens cleaning solution applied to the cloth, not directly to the lens.
  • Тело објектива: Wipe the lens body with a soft, dry cloth. Do not use organic solvents like paint thinner or benzene.
  • прашина: Користите четкицу за дување да бисте уклонили прашину са површине сочива.

Складиштење

When not in use, store the lens with both front and rear caps attached in a cool, dry place away from direct sunlight and extreme temperatures. Avoid storing the lens in areas with high humidity to prevent mold growth.

Решавање проблема

  • Аутофокус је спор или нетачан:

    Ensure the AF/MF switch on the lens is set to 'AF' and the camera body is also set to autofocus. Check lighting conditions; very low light can affect AF performance. If issues persist, try cleaning the lens and camera contacts. Some users have reported inconsistent SDM performance; if this occurs, contact Pentax customer support.

  • Image quality is soft or blurry:

    Verify that the lens is properly focused. Check your camera's shutter speed to avoid motion blur, especially in low light. Ensure the aperture setting is appropriate for your desired depth of field. Clean lens elements if smudges are present. If softness persists across all settings, the lens may require servicing.

  • Камера не препознаје објектив:

    Ensure the lens is securely mounted to the camera body. Clean the electronic contacts on both the lens mount and camera body with a clean, dry cloth. Power cycle the camera.

Спецификације

ФеатуреДетаљ
Фоцал Ленгтх55mm (equivalent to 84.5mm in 35mm format)
Максимални отвор блендеф/1.4
Минимални отвор блендеф/22
Ленс Цонструцтион9 elements in 8 groups (including ED optical elements)
Угао од View28.6 degrees (with Pentax DSLR)
Диапхрагм Бладес9 (заокружено)
Минимална удаљеност фокуса1.48 стопа (0.45 метра)
Максимално увећање0.173к
Пречник филтера58мм
Diaphragm ControlПотпуно аутоматски
СјенилоPH-RBH (included)
МоунтPentax KAF3
Објецтиве ЦапO-LC58 (included)
СлучајS90-100 (included)
Димензије (пречник к дужина)2.8 инча к 2.6 инча (71 мм к 66 мм)
Тежина13.2 унце (374 грама)

Гаранција и подршка

This Pentax lens typically comes with a једногодишња ограничена гаранција from the date of purchase. Please refer to the warranty card included with your product for specific terms and conditions. For technical support, service, or warranty claims, please contact Pentax customer service or visit the official Pentax webсајт за ваш регион. Сачувајте доказ о куповини ради потврде гаранције.

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