Originally posted by biz-engineer I can understand 100% zoomed in on my display* , or 1 to 1 pixel on display, but 100% crop always got me confused.
*(100% preview on camera wasn't even clear to me until it was discussed in an recent thread)
100% "zoomed" on a computer monitor or camera LCD is the same thing...
1 pixel in the image is displayed by one pixel on the viewing device. In any viewing/editing software you can select "view actual size", or view 100% or even double click. This is the same as using the cameras e-dials to zoom your image to 100%
Historically when someone wanted to post on a forum an image or part of an image that could be examined at 100% pixel level so that issues like focus or CA can be discussed, there was always problems:
1.Posting the full image would not be possible because most forums have a maximum size and would downsize the image.
2.Bandwidth issues would mean that it would be slow to display for most users.
3. Anyone viewing the full image at 100% could not be sure they were looking in the right place in the image in question.
So the poster would make a crop of the original image without any re-sizing and post that.
100% means that the posted image can be viewed at 1:1 on most folks screens **. Crop means it is a portion of the original image. The 100% does not refer to the crop itself.
** As long as the pixel dimensions of the crop is chosen suitably. A 100% crop with a pixel height of 2000 would be no good in this regard as it is taller than most folks screen resolutions and would be downsized by the forum software anyway.
Last edited by pschlute; 11-07-2021 at 06:35 AM.