D7100 crop - what is it?

Started Jan 2, 2014 | Discussions thread
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jimoyer
jimoyer Senior Member • Posts: 1,872
Re: Or to make it redicliously simple!
2

But that's where you're thinking wrong.  If your subject is the same size to be properly framed in each image, it will exceed the available area on the cropped frame image.

To completely fill your image frame,, the subject will need to be larger in DX mode and smaller in 1.3x mode to produce an equivalent size in the final product.  If you do that, all you are going to see until the subject arrives in your frame is the black outline of the DX frame.  If you shoot the same image, with a slightly smaller subject that will fill the full image frame of 1.3x, it allows you a visible area outside that frame to anticipate when your subject will arrive in your frame.

You're thinking this through as if your subject size is going to be equal because you can just crop it in post which is certainly viable, but less than optimal when you're shooting 1000+ frames at a time during a professional sports game for example.  The more you can accomplish in camera, the less you have to spend hours upon hours doing in post.

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