frankie_frank1 Posted October 29, 2007 Share Posted October 29, 2007 What does it mean? Link to comment Share on other sites More sharing options...
phule Posted October 29, 2007 Share Posted October 29, 2007 View the image at 1:1 or 100% on your computer screen. Crop something from it. Link to comment Share on other sites More sharing options...
ShunCheung Posted October 29, 2007 Share Posted October 29, 2007 See towards the end of the following thread: http://www.photo.net/bboard/q-and-a-fetch-msg?msg_id=00N0bl Link to comment Share on other sites More sharing options...
frankie_frank1 Posted October 29, 2007 Author Share Posted October 29, 2007 Then, what is 200% crop? Link to comment Share on other sites More sharing options...
phule Posted October 29, 2007 Share Posted October 29, 2007 <<Then, what is 200% crop?>> View the image at 200% and crop something from it. Link to comment Share on other sites More sharing options...
phule Posted October 29, 2007 Share Posted October 29, 2007 Here's an example of 100% crops. http://www.dpreview.com/reviews/canonG9/page12.asp The G9 and G7 images are viewed at 100% and then small sections are selected from it. Link to comment Share on other sites More sharing options...
ellis_vener_photography Posted October 29, 2007 Share Posted October 29, 2007 100 percent crop means: full image size. a 50 percent crop means half the area of the image has been cropped out. Are you confusing cropping with magnification? What is the context? Link to comment Share on other sites More sharing options...
phule Posted October 29, 2007 Share Posted October 29, 2007 I would more assume that the phrase "100% crop" to mean "selected areas of the image viewed at 100% magnification." This is the case in the time of the Great Pixel Peeping Pandemic. Link to comment Share on other sites More sharing options...
phule Posted October 29, 2007 Share Posted October 29, 2007 s/assume/take/ Link to comment Share on other sites More sharing options...
mendel_leisk Posted October 29, 2007 Share Posted October 29, 2007 Comes up a lot: http://www.photo.net/bboard/q-and-a-fetch-msg?msg_id=00N2ZD Link to comment Share on other sites More sharing options...
mendel_leisk Posted October 29, 2007 Share Posted October 29, 2007 My take: if you post an image in this thread, say 500 pixels square, and no resampling has ever occurred to this image, then it is 100% crop. 200% crop? I suppose it could mean if you cropped (say) 250x250 pixels from an image, then upsampled it to be 500x500 pixels, and then posted it thus. Link to comment Share on other sites More sharing options...
frankie_frank1 Posted October 29, 2007 Author Share Posted October 29, 2007 How can you resample it to 500x500 from 250x250? Link to comment Share on other sites More sharing options...
SCL Posted October 29, 2007 Share Posted October 29, 2007 Same way you enlarge a print from a negative, except electronically. In PS resize, bicubic smoother. Link to comment Share on other sites More sharing options...
walterh Posted October 29, 2007 Share Posted October 29, 2007 100% crop is best mode for pixel peeping because one camera pixel (computed by your RAW converter software) is mapped to one monitor pixel. If you have bad eyesight a 200% crop can help when pixel peeping. Be aware though that up-sampling can sometimes introduce artifacts and you conclude from your pixel-peeping you see new problems of your camera^^. Same is true for pixel peeping of jpg files - make certain you do not blame your camera or lens on jpg effects (same for sharpening). Link to comment Share on other sites More sharing options...
lex_jenkins Posted October 29, 2007 Share Posted October 29, 2007 Take a print. Put a piece of paper over it that covers half the print. Bingo, 50% crop. Take another sheet of paper, cut out a mask equivalent to half the area of the print, again, 50% crop. Now take a magnifying glass. Examine the cropped photo closely. It's magnified and easier to see, but still a 50% crop. But when used in reference to dSLRs, it doesn't mean a thing. The notion that the 35mm film format is the one and only is not just an outmoded paradigm, it's never even been accurate. Fans of large format and medium format would laugh at the notion that 35mm is "full frame." OTOH, most digital cameras, P&S and dSLRs alike, offer the ability to review photos at various magnifications, anywhere from 100% (seeing the entire frame unmagnified) on up. It's useful for checking focus accuracy. I find it handy because, while I don't need eyeglasses when looking through the viewfinder, or at distances beyond 10 feet or so, I do need them for reading. It's a hassle taking off and putting on my glasses. So I'll keep 'em in my pocket and use the magnification option on the LCD screen to check focus. In this context, tho', we're not talking about "cropping." We're talking about magnification. However the little LCD monitor isn't useful for much else. It doesn't give a reliable indicator of exposure or color temperature accuracy. And, obviously, "100%" on a tiny LCD monitor isn't comparable to 100% on a computer monitor. Pixel peeping can be useful for spotting flaws, such as faulty pixels or noise. It's also useful for helping in retouching, such as stray hairs on a groom's tuxedo. And it can help when evaluating subtle differences in sharpening. Link to comment Share on other sites More sharing options...
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