The D2X's unique High-speed crop feature is designed to deliver the best of both worlds for the photographer. Most professional digital SLR's are designed for either resolution or high speed shooting (mostly for sports), the D2X can execute both. In normal mode the camera shoots 12.2 MP images at up to 5.3 frames per second, switch to High-speed crop mode and you get 6.9 MP images at up to 8.0 frames per second.
In High-speed crop mode the camera captures an area at the center of the frame equivalent to a 2.0x field of view crop (where as normal is a 1.5x field of view crop), this results in a lower resolution image (although 6.9 MP is still more than sufficient for most jobs), less data needs to be transferred and the camera can shoot at the faster rate. The High-speed crop area is shown on the viewfinder focusing screen, in a sports shooting situation where you are likely to be using a telephoto lens the extra crop also means you're getting the equivalent field of view of a longer lens.
|Mode||A 55 mm
|Image size||Max shooting
bus rate *
|Normal||82.5 mm equiv. FOV||12.2 MP||5.3 fps||96.9 MB/sec|
|High-speed crop||110 mm equiv. FOV||6.9 MP||8.0 fps||82.8 MB/sec|
* Not official Nikon data, calculated as 12-bits x MP x fps
The two shots shown below were taken in Normal and High-speed crop modes and show the difference in frame coverage between the two (same shot as indicated above). Use High-speed crop mode on a 300 mm lens and you get the equivalent field of view as a 600 mm lens.
|Normal mode (82.5 mm equiv. FOV)||High-speed crop mode (110 mm equiv. FOV)|
Image overlay & Multiple exposure
The D2X has two separate features for combining multiple exposures into a single image. Image overlay allows you to combine two existing RAW images into one merged image. Multiple exposure mode allows you to take between two and ten shots which are then combined into one image.
The Image Overlay menu consists of three image thumbnails; the two images to be overlaid and a preview of the final image. You can set the 'gain' for each image, this affects how they are combined (0.5 halves the gain, 2.0 doubles the gain). Finally select 'Save' to output the image.
|Image Overlay menu option||Two images have been selected and the gain set to x 0.5 for both|
|Move to the preview image and press the zoom button to see a preview||Select save to produce the final image (in this case output to a Large/Fine JPEG)|
The results of this overlay can be seen below as well as the effect of changing the gain level for each image.
|Image 1 (shot as RAW, re-saved as JPEG)||Image 2 (shot as RAW, re-saved as JPEG)|
|Image 1: x 0.5, Image 2: x 0.5||Image 1: x 0.7, Image 2: x 0.3|
|Image 1: x 0.3, Image 2: x 0.7|
In multiple exposure mode the camera does not store the individual frames but instead outputs just the combined image, you can select from two to ten frames to be combined and whether the camera adjusts the gain (brightness) of each image automatically (so for four shots each would have a gain of 0.25 applied to produce the final image). In the example below we used four shots and auto gain, moving the 'Buzz Lightyear' in each frame.
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