Lunch atop a (Springfield) skyscraper

Lunch atop a (Springfield) skyscraper
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Size in inches and dpi are meaningless metrics for digital files, only the pixel dimensions are relevant. If you do not want to simply sell the images at their native resolution, you could provide several options, say 2, 6, 8 or 20 megapixels, for increasing prices, of course. That way, it becomes the customers decision how large they need their images to ...


If the images are of your clients or commissioned by them, and you are charging them for digital files, just give them files at the original resolution. There is really no such thing as sending too many pixels to the printer regardless of final print size. The whole thing about DPI when choosing the pixel size of an image is misleading, but if you want to ...


Why don't you ask your client, what kind of size she/he wants ? It'll her/his choice and responsibility for future prints.


My understanding is that like most lens testers/reviewers other than LensRentals/Roger Cicala, DXO tests only one copy of a lens at a time. How long they keep them or whether they return or sell them I don't know. But my suspicion is that they owned different copies at the time they tested the E-PL5 and E-PL7, and the latter was a bad copy.


The long answer has already been covered pretty well, which is that compressed file formats don't actually record every pixel. They do something along the lines of recording a particular color of a particular pixel and then recording "this color is used again at x, y, and z locations." This is (theoretically) fine if you've captured your image exactly as you ...


This is absolutely normal. While the sensor always samples the same amount of data, the file does not need the same number of bytes to represent different images. The more details there are, the more bytes it takes to represent its contents. This is particularly true of lossless formats like most RAW, DNG and TIFF. They use algorithms to represent the ...


If you have several dozen random JPG images from one camera (many scenes, but all of same image size) in a folder, and then sort them by file size ("details" view), it is hard to say what your pictures might be, but their JPG file size will vary (largest vs. smallest) probably at least 2 to 1, and extremes can be much more, possibly 8 to 1 (just for some ...


This is not only possible, but extremely likely, when you're using a compressed image format such as JPEG. Data compression methods in general become more efficient as the data to be compressed decreases in entropy (try creating zip files of a large page of actual text vs. the same sized page of a single repeated character). The more features or fine ...


The sensor is made of of photosites. Each one is a finite physical element which cannot change size. When a camera or phone takes a photo, each photosite is normally turned into a pixel. Other than on Foveon sensors (and a few others no longer in production), the camera uses information of adjacent photosites to interpolate full color information. So, while ...


Simply resizing the photo should be practically instant. If the Zenfone spends seconds to process the image it's probable that it's doing something more intensive such as advanced noise reduction - possibly "dark frame subtraction" where it takes another exposure with the shutter closed and subtracts that image (which only contains noise) from the original.

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