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Photography Q&A
Help me understand FX vs. DX
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<blockquote data-quote="RocketCowboy" data-source="post: 519242" data-attributes="member: 25095"><p>Light is light, so f-stops and ISO aren't specifically related to "receiving more light" in the larger FX camera body. The hole in the front of the lightbox that is either the DX camera or FX camera is the same, the same amount of light enters the lightbox. It comes down to sensor size that determines how well that light can be captured/processed.</p><p></p><p>In the DX body, the sensor size is smaller. In FX, the sensor is the same size as a traditional 35mm film negative. That size different determines the rest. The DX body with 24 megapixels has all those pixels compacted into a small area that makes the 600mm focal length lens effectively a 900mm focal length. On the FX body, the 24 megapixel sensor has the pixels spread out across a larger area ... so if you crop to effectively 900mm field of view, you're throwing away pixels and consequently IQ. At that point, you're comparing a 24 megapixel DX image to a ~12-14 megapixel FX image.</p></blockquote><p></p>
[QUOTE="RocketCowboy, post: 519242, member: 25095"] Light is light, so f-stops and ISO aren't specifically related to "receiving more light" in the larger FX camera body. The hole in the front of the lightbox that is either the DX camera or FX camera is the same, the same amount of light enters the lightbox. It comes down to sensor size that determines how well that light can be captured/processed. In the DX body, the sensor size is smaller. In FX, the sensor is the same size as a traditional 35mm film negative. That size different determines the rest. The DX body with 24 megapixels has all those pixels compacted into a small area that makes the 600mm focal length lens effectively a 900mm focal length. On the FX body, the 24 megapixel sensor has the pixels spread out across a larger area ... so if you crop to effectively 900mm field of view, you're throwing away pixels and consequently IQ. At that point, you're comparing a 24 megapixel DX image to a ~12-14 megapixel FX image. [/QUOTE]
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Help me understand FX vs. DX
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