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<blockquote data-quote="Whiskeyman" data-source="post: 248326" data-attributes="member: 13556">The reduction in field of view may not be quite that pronounced with some lenses.&nbsp; I can't remember which DX lens it was, but its projection was almost as large as that of a regular full frame lens.&nbsp; The image quality showed strong degradation towards the perimeter, though.&nbsp; But that won't matter as an FX camera body will detect the DX lens and only produce an image size corresponding to a DX camera.Look at it this way:&nbsp; Focal length has to do with how big your subject appears in your image.&nbsp; All other things equal, longer focal length= bigger subject size.Field of view has to do with how much around the subject you can fit into the image.&nbsp; All other things equal, a shorter lens focal length shows more of a scene than a longer focal length lens.&nbsp; And FX camera with an FX lens can show more of a scene than a DX format camera can.Visit a camera shop and have them show you two cameras (one DX format, one FX)&nbsp; with the same focal length lens on it.&nbsp; (The lens must be an FX lens if only one is used.)&nbsp;&nbsp; Pay attention to the outer boundaries of the scene in the viewfinder, and then switch to the other format body, paying attention to the boundaries again.&nbsp; There's a great demonstration on field of view on different format cameras.There, clear as mud, isn't it!:confusion:WM</blockquote>

[QUOTE="Whiskeyman, post: 248326, member: 13556"] The reduction in field of view may not be quite that pronounced with some lenses. I can't remember which DX lens it was, but its projection was almost as large as that of a regular full frame lens. The image quality showed strong degradation towards the perimeter, though. But that won't matter as an FX camera body will detect the DX lens and only produce an image size corresponding to a DX camera. Look at it this way: Focal length has to do with how big your subject appears in your image. All other things equal, longer focal length= bigger subject size. Field of view has to do with how much around the subject you can fit into the image. All other things equal, a shorter lens focal length shows more of a scene than a longer focal length lens. And FX camera with an FX lens can show more of a scene than a DX format camera can. Visit a camera shop and have them show you two cameras (one DX format, one FX) with the same focal length lens on it. (The lens must be an FX lens if only one is used.) Pay attention to the outer boundaries of the scene in the viewfinder, and then switch to the other format body, paying attention to the boundaries again. There's a great demonstration on field of view on different format cameras. There, clear as mud, isn't it!:confusion: WM [/QUOTE]

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