Road Train !!!!!!!!!!

by Russell McMahon

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Not necessarily. If the format you are using makes use of compression, then different images of the same resolution can lead to different file sizes depending on how much variation it contains. For example, I've attached is a beautiful 500x500px image I knocked up in MS Paint which I saved in full resolution in both jpeg and bitmap formats. For comparison I ...


If every photo has the exact same image, DPI, metadata and compression, they should be the same. There is a lot of data behind the scenes. It is called metadata. It contains the camera information, lens, aperture, stop set, copyright, location, and any other information the photographer wishes to add to it. This metadata can change the size of your ...


The Bayer array doesn't help the issue of diffraction. Blue light has the shortest wavelength and thus suffers less from diffraction than green or red. The highest resolving "conventional" sensor would be sensitive to blue light. But in addition to losing color the images would look a bit weird because blue only contributes about 10% to luminance. If you ...


In theory there is no limit if the number of collected photons can be arbitrarily large and the object is stationary. The diffraction limit and lens imperfections can be circumvented by deconvolution. The limitations due to the finite pixel size can be dealt with using superresolution methods. Here you make multiple exposures where the camera is shifted such ...


In addition to Michael's excellent answer on diffraction, there are a huge number of other effects which are going to limit your resolution; here's just a brainstormed list: What are you using to record the image? The practical answers here are either film, which has a finite grain size and thus a finite resolution, or a digital sensor, which has a finite ...


Diffraction limits the ability of a lens to resolve adjacent image details separately. Exposure length or combining separate images cannot overcome this. Basically, due to diffraction, a point source of light (i.e. a small image detail) will produce this signal on the sensor: Two details that are just far enough apart to be resolved as separate: But ...

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