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Dynamic Range
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The Sony a7 cameras are currently the only way to get quality Canon glass (and quality sunstars, with the 9-blade apertures in Canon's latest zooms) with expansive Raw dynamic range capabilities.
¼Ò´Ï a7 Ä«¸Þ¶ó´Â °í±Þ ij³í ·»ÁÀ» ÀÌ¿ëÇÏ¿© (ij³íÀÇ Ãֽſ¹ ÁÜ·»Áî¿¡ äÅÃµÈ 9¿± Á¶¸®°³³¯¿¡¼ »Õ¾îÁö´Â ¸ÚÁø ºû°¥·¡¸¦ ¸¸³£Çϸé¼) º¸´Ù È®´ëµÈ RAW ´ÙÀ̳»¹Í ·¹ÀÎÁö¸¦ ÀÌ¿ëÇÏ¿© »çÁøÀ» ÂïÀ» ¼ö ÀÖ´Â ÇöÁ¸ÇÏ´Â À¯ÀÏÇÑ ´ë¾ÈÀÌ´Ù. (¿ªÀÚÁÖ: ij³í ¹ÙµðÀÇ DRÀº ´äÀÌ ¾ø´Ù)
The Sony a7R II will almost undoubtedly offer the Raw dynamic range we've come to expect and love of Sony sensors. And for a high resolution camera undoubtedly to be picked up by landscape photographers, dynamic range is bound to matter. With the latest generation of high performance, full-frame image sensors, we're starting to approach the point where many high contrast scenes can be recorded in one exposure, as long as you expose for the highlights and tonemap in post-processing. And for scenes still demanding techniques to work around dynamic range limitations, such as the very high dynamic range scene above, the higher the dynamic range of your sensor, the better.
¼Ò´Ï a7R II´Â »ç½Ç»ó ÀüÇô ÀǽÉÇÒ ¿©Áöµµ ¾øÀÌ »ç¶û½º·¯¿î ¼Ò´Ï Ãֽſ¹ ¼¾¼¸¦ »ç¿ëÇÏ¿© ¿ì¸®¿¡°Ô ȲȦÇÑ RAW ´ÙÀ̳»¹Í ·¹ÀÎÁö¸¦ ¼±»çÇØÁÙ °ÍÀÌ´Ù. ±×¸®°í 4,240¸¸ ȼÒÀÇ °íÇØ»óµµ ÈÁú ¿ª½Ã ¾Æ¹«·± ÀǽÉÁ¶Â÷ ÇÒ ÇÊ¿äµµ ¾øÀ» Á¤µµ·Î dz°æ»çÁø°¡µé¿¡°Ô´Â ÃÖ»óÀÇ ¿É¼ÇÀÌ µÉ °ÍÀÌ´Ù. ¹°·Ð dz°æ »çÁø°¡µé¿¡°Ô ´ÙÀ̳»¹Í ·¹ÀÎÁö°¡ Áß¿äÇÑ ¿ä¼ÒÀÓÀº µÎ¸»ÇÒ ³ªÀ§°¡ ¾ø´Ù. a7R II´Â ÇöÁ¸ÇÏ´Â Ä«¸Þ¶ó Áß¿¡¼ °¡Àå ¶Ù¾î³ ÆÛÆ÷¸Õ½º¸¦ º¸¿©ÁÙ Ç® ÇÁ·¹ÀÓ ¼¾¼¸¦ °¡Áö°í ÀÖÀ¸¸ç À̸¦ Å×½ºÆ® Çϱâ À§Çؼ ÇâÈÄ ¸®ºä¸¦ ÇÒ ¶§¿¡, dz°æ»çÁøÀ» ÂïÀ¸¸é¼ ÇÑÀåÀÇ »çÁø¿¡ ÄÁÆ®¶ó½ºÆ®°¡ Å©°Ô ´ëºñµÇ¾î DRÀÌ ±Ø¸íÇÏ°Ô µå·¯³ª´Â »çÁøµµ ÂïÀ» °ÍÀ̸ç, Èĺ¸Á¤½Ã¿¡ Åæ¸Ê°ú ÇÏÀ϶óÀÌÆ®°¡ ¾î¶»°Ô ±¸ÇöµÉ Áöµµ ÁöÄѺ¼ °ÍÀÌ´Ù. ±×¸®°í ¿¹¸¦ µé¾î HDR Àå¸éº¸´Ù ´õ ³ôÀº ´ÙÀ̳»¹Í ·¹ÀÎÁö »óȲ µî ±ØÇÑ¿¡ À̸£´Â »óȲ¿¡¼ ¿ä±¸µÇ´Â ´Ù¾çÇÑ È»ó ±â¼úµéÀÌ ÀÌÀü¿¡ ºñÇØ ´õ ³ª¾ÆÁ³´ÂÁöµµ º¼ ¿¹Á¤ÀÌ´Ù.
For example, for this particular shot, taken with a Sony a7R and a Canon 16-35mm F4L IS lens, I've gotten away with just the use of a 3-stop GND filter, obviating the need to merge bracketed exposures - something I was in the habit of doing with my Canon EOS 5D Mark II. This allowed me to focus on other aspects of the shot, such as shooting f/22 for the sunstar, and f/8 for everything else (to avoid diffraction-induced softening for most of the shot), as well as focus bracket. Had I had to worry about exposure bracketing as well on top of all this, I might've missed nailing the perfect moment.
¿¹¸¦ µé¾î, ÀÌ »çÁøó·³ (ij³í 16-35mm F4L IS ·»Áî¿Í ¼Ò´Ï a7RÀÇ Á¶ÇÕÀ¸·Î ÂïÀº) ³ª´Â Á¾Á¾ 3½ºÅ¾ÀÇ ND ÇÊÅ͸¦ ÀÌ¿ëÇÏ¿© ³ëÃâÀ» ¾ïÁ¦½ÃŲ »óȲ¿¡¼ »çÁøÀ» Âï°ï ÇÑ´Ù. °£È¤ ³ª´Â EOS 5D Mark II·Î °°Àº »óȲ¿¡¼ ÂïÀ» ¶§µµ ÀÖ´Ù. ÀÌ·¯ÇÑ °æÇèµéÀ» ÅëÇØ, ³ª´Â ÃÔ¿µ ÀÌ¿ÜÀÇ ¿ä¼ÒµéÀ» °í·ÁÇÏ°Ô µÇ¾úÀ¸¸ç, ¿¹¸¦ µé¾î F22·Î Á¶¿©¼ ºû°¥·¥À» °Á¶Çϰųª F8·Î Á¶¿©¼ ȸÀýÀ» ÃÖ¼ÒȽÃÅ°°Å³ª, ȤÀº Æ÷Ä¿½º ºê¶óÄÉÆÃÀ» ÇÏ´Â µî ´Ù¾çÇÑ ±â¹ýÀ» »ç¿ëÇÏ°ï ÇÑ´Ù. µû¶ó¼ ³ª´Â ÃÔ¿µ½Ã ³ëÃâ ºê¶óÄÉÆÃÀ» Áß¿ä½Ã ÇÒ ¼ö ¹Û¿¡ ¾ø°Ô µÇ¾úÀ¸¸ç ÀÌ´Â °áÁ¤ÀûÀÎ ¼ø°£À» ³õÄ¡Áö ¾Ê±â À§ÇؼÀÌ´Ù.
NIKON CORPORATION | NIKON D810 | 2014-10-01 14:50:02
Manual | Multi-Segment | Auto WB | 1/640s | F4.0 | 0.00 EV | ISO-140 | 200.00mm | 35mm equiv 200mm | Flash not fired; Compulsory flash mode
This shot was exposed for the highlights by keeping ISO near base. I shot in M mode which allowed me to dial in a wide-open aperture and the shutter speed necessary to freeze the action (1/640s). In order to ensure I didn't blow any of the sky, I kept my ISO down at 140. Pushing shadows/midtones 4 EV in post, while holding back the highlights, I was able to tonemap the scene to my desired vision, without tones becoming too noisy. All thanks to the Raw dynamic range of the Nikon D810.
ÀÌ »çÁøÀº ISO¸¦ °ÅÀÇ ÃÖÀú·Î ¹Àº »óÅ¿¡¼ ÇÏÀ϶óÀÌÆ®¸¦ ÃÖ´ëÇÑ È®º¸Çϱâ À§ÇØ ³ëÃâÀ» ÁØ »çÁøÀÌ´Ù. ³ª´Â À̸¦ À§ÇØ M ¸ðµå¿¡¼ Âï¾úÀ¸¸ç, ÀÌ´Â Á¶¸®°³¸¦ °¡±ÞÀû ÃÖ´ë·Î °³¹æÇÏ°í ¼ÅÅͽºÇǵ带 °¡´ÉÇÑ ³ô¿©¼ ¿òÁ÷ÀÌ´Â ÇÇ»çü¸¦ ¶Ç·ÇÇÏ°Ô Æ÷ÂøÇϱâ À§ÇÔÀÌ´Ù (1/640s). ÇÏ´ÃÀÇ °èÁ¶¸¦ ÃÖ´ëÇÑ È®º¸Çϱâ À§Çؼ ³ª´Â ISO¸¦ 140Á¤µµ¿¡ ¸ÂÃß¾ú´Ù. 4EV Á¤µµ ¼¨µµ¿ì/¹ÌµåÅæÀ» Èĺ¸Á¤ ÇßÀ¸¸ç, ÇÏÀ϶óÀÌÆ®´Â À¯Áö½ÃÄ×´Ù. ÀÌ·¯ÇÑ Èĺ¸Á¤À» ÅëÇؼ ³ëÀÌÁî°¡ ¹ß»ýÇÏ´Â °ÍÀ» ¸·À¸¸é¼ Åæ¸ÊÀ» ³»°¡ ¿øÇÏ´Â ¼öÁØÀ¸·Î ¸ÂÃâ ¼ö ÀÖ¾ú´Ù. ÀÌ ¸ðµç °ÍÀº ¶Ù¾î³ ´ÏÄÜ D810ÀÇ RAW ´ÙÀ̳»¹Í ·¹ÀÎÁö ´öºÐÀÌ´Ù.
And even if it's not landscape photography you do, dynamic range helps - it offers you exposure latitude (the ability to 'rescue' exposures) and the ability to underexpose your images to retain highlight information by selectively brightening tones in post-processing, as I've done in this action shot of a horse galloping on the beach against a bright, setting-sun sky (above).
±×¸®°í ºñ·Ï ´ç½ÅÀÌ Ç³°æ»çÁø°¡°¡ ¾Æ´ÒÁö¶ó ÇÏ´õ¶óµµ, ´ÙÀ̳»¹Í ·¹ÀÎÁö´Â °á±¹ µµ¿òÀ» ÁÙ °ÍÀÌ´Ù. ´ÙÀ̳»¹Í ·¹ÀÎÁö´Â »çÁø°¡·Î ÇÏ¿©±Ý ³ëÃâ °ü¿ëµµ (³ëÃâÀ» È®º¸ÇÒ ¼ö ÀÖ´Â ´É·Â)¸¦ È®º¸ÇÏ°Ô ¸¸µé¾î ÁÙ »Ó¸¸ ¾Æ´Ï¶ó ÅæÀ» ¼±ÅÃÀûÀ¸·Î Á¶ÀýÇÏ´Â Èĺ¸Á¤À» ÅëÇØ ÇÏÀ϶óÀÌÆ® Á¤º¸¸¦ »ì·ÁµÎ¸é¼ À̹ÌÁö¸¦ ÀûÁ¤³ëÃ⺸´Ù ¾îµÓ°Ô Ç¥ÇöÇÒ ¼öµµ ÀÖ´Ù. À§ »çÁø¿¡¼ º¸µí ÇØÁú³è ³ëÀ»À» »ì¸®¸é¼ ¹Ù´Ù¿¡ ¹Ý»çµÇ´Â ºûÀ» °Á¶ÇÏ°í, ±×¸®°í ÈûÂ÷°Ô ¶Ù¾î°¡´Â ¸»À» µ¿½Ã¿¡ Ç¥ÇöÇØ ³¾ ¼ö ÀÖ´Â °ÍÀÌ´Ù.
In fact, if I may engage in some speculation here: with the expanded photo-sensitive area of each pixel, and the off-loading of electronics to a separate area, one might wonder if the BSI sensor in the a7R II might offer even more dynamic range than its predecessor, as there may be room or capability for larger photodiodes and potential wells. I must stress that I'm purely speculating here, but we'll be excited to test if dynamic range has increased over the already high capability of the original a7R, and particularly if it catches up with the class-leading dynamic range of the Nikon D810 at ISO 64, where Nikon appears to have increased the full-well capacity of the pixels on the already excellent 36MP sensor from Sony (the more light you collect, typically the higher the dynamic range, unless read noise is the limiting factor).
»ç½Ç, ÀÌ ½ÃÁ¡¿¡ ÀÖ¾î¼ ³ª´Â ¸ðÁ¾ÀÇ Àǹ®ÀÌ ÇÑ°¡Áö µé±ä ÇÏ´Ù. º¸´Ù È®´ëµÈ °¢°¢ÀÇ È¼ÒÀÇ ¼ö±¤¸éÀû ¹× °¢°¢ÀÇ ¿µ¿ª¿¡ ºÐ¸®µÈ °¢Á¾ ÀüÀÚºÎÇ°°ú ¹è¼± µî a7R II¿¡ Àû¿ëµÈ ½ÅÇü À̸éÁ¶»çÇü ¼¾¼¸¦ ÅëÇØ ±¸Çü ¹Ùµðµéº¸´Ù ´õ dzºÎÇÑ ´ÙÀ̳»¹Í ·¹ÀÎÁö¸¦ È®º¸Çß´Ù¸é, ÀÌ´Â Çʽà ¼¾¼ÀÇ Æ÷Åä ´ÙÀÌ¿Àµå°¡ ¹«Ã´À̳ª ¿©À¯°¡ ÀÖ´Ù´Â °ÍÀ» ÀǹÌÇÏ´Â °ÍÀÌ´Ù. ³ª´Â ÀÏ´Ü ÀǽÉÀ» Çϸ鼵µ ²Ä²ÄÇÏ°Ô ½ÇÁ¦·Î ´ÙÀ̳»¹Í ·¹ÀÎÁö°¡ ¾î¶²Áö Å×½ºÆ®ÇØ º¼ °ÍÀÌ´Ù. ÀÌ´Â ÀüÀÛÀÎ a7RÀÇ ³ôÀº ´ÙÀ̳»¹Í ·¹ÀÎÁöº¸´Ù ´õ ³ª¾ÆÁ³´ÂÁö, ¾÷°è ÃÖ°í ¼öÁØÀÎ ´ÏÄÜ D810 ISO 64¿¡¼ÀÇ ´ÙÀ̳»¹Í ·¹ÀÎÁö¿¡ ºñÇØ ¾î¶²Áö ºñ±³ÇØ º¼ ¿¹Á¤ÀÌ´Ù. ¾Æ½Ã´Ù½ÃÇÇ ´ÏÄÜ D810Àº ÀÌ¹Ì ¾÷°è¿¡¼ Á¤ÆòÀ̳ 3,600¸¸ È¼Ò ¼Ò´ÏÁ¦ ¼¾¼ (¼ö±¤´É·Â Áõ´ë, ³ôÀº ´ÙÀ̳»¹Í ·¹ÀÎÁö, Àú ³ëÀÌÁî)ÀÇ ´ÙÀ̳»¹Í ·¹ÀÎÁö¸¦ ´õ ²ø¾î¿Ã¸° Á¦Ç°À̱⵵ ÇÏ´Ù.
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