| 翻訳と辞書 |
| Pentax Q series ： ウィキペディア英語版 |
Pentax Q series
The Pentax Q series is a series of mirrorless interchangeable-lens cameras made by Pentax and introduced in 2011 with the initial model Pentax Q.〔(Pentax Q small-sensor mirrorless camera announced and previewed )〕 , it is the world’s smallest, lightest interchangeable lens digital camera.〔Pentax Q - 180 g; Nikon J1 - 234 g; Olympus E-PM1 - 265 g〕 The first models used a 1/2.3" (6.17 x 4.55 mm) back-illuminated sensor CMOS image sensor, which is substantially smaller than the sensors in other interchangeable lens cameras. The Q7, introduced in June 2013, uses an almost 50% larger 1/1.7" type sensor (7.44 x 5.58 mm).〔(【引用サイトリンク】url=http://www.dpreview.com/news/2013/06/12/Pentax-announces-Q7-with-larger-1-over-1-point-seven-inch-12MP-BSI-CMOS-sensor#specs )〕
==Characteristics==
The small sensor size means that the Q series has a crop factor of 5.6× (or 4.7x for the Q7 and Q-S1) and a short flange focal distance (FFD). With the 5.6× crop factor, a 100 mm macro lens (for example) becomes a (35 mm equivalent) 560 mm extreme telephoto or an extreme close-up lens capable of 1:1 macro reproduction. An additional implication of the 5.6x crop factor and associated optics is that depth of field (DOF) is increased proportionally for a given aperture setting (in comparison to the 35mm equivalent depth of field at the corresponding aperture). In some applications this gives the Pentax Q an advantage over more conventional mirrorless sensor formats, which offsets other limitations arising from the smaller sensor size. Moreover the Pentax Q includes bokeh functions to provide additional control over DOF effects so that shallow focus can be achieved if required.
The short FFD of the Pentax Q series allows the use of third-party adapters to mount lenses from many manufacturers on the Pentax Q body, including Olympus OM, Canon FD, Minolta, M42 screw mount, C-Mount, D-Mount, Pentax K, and Pentax 6×7. A Pentax adapter for Pentax K-mount lenses was announced for delivery in the spring of 2012, but was delayed until October, 2012.
The camera is equipped with sensor-shift image stabilization technology to improve image quality in low light or when using telephoto lenses.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
■ウィキペディアで「Pentax Q series」の詳細全文を読む
スポンサード リンク
| 翻訳と辞書 : 翻訳のためのインターネットリソース |
Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.
|
|