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Megapixels: Do you need more?

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A brief, yet detailed video where I discuss the importance of megapixels – and why you should care! SUBSCRIBE and like http://fb.com/NorthrupPhotography Buy …


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  1. Tony, how well do the legacy lenses (70's Nikon, Canon, 50mm f1.8 and such) compare in pmp? Has big name glass gone up or down in true sharpness? (When sharpness used to be measured by how many line pairs per mm the film could hold, IIRC with 200 lp/mm used to be pretty good, but the big name glass never limited that?)

  2. Also, fractal upsampling (e.g. Iterated Fractal Transform or IFT) enables you to dramatically blow past any such limits. Although the maximum upsizing depends on the source material type (e.g. architectural, nature, portraits, etc), if you use that together with sharpening appropriate to the material and paper material, coating and viewing distance, common low-Nyquist noise ratios in each dimension are 2, 4 and 8 times. In other words, 4. 16 and 64-times the pixels for even low viewing distances. Photoshop provides this as part of their upsampling options, but there are many cheap, free and other options. Years ago, in the 90’s, when Michael Barnsley first created the early IFT fractal encoders, it was used to create the image of a meteor crashed into a building for one of the end of the earth movies of that era. It was made the size of the side of a building from a 2 MB digital file. It looked so photorealistic from the street that they took it down the first week because it was creating traffic jams and crashes.

  3. This is the best vid I’ve watched. I shoot in crop mode all the time with my a7iii because I think 10mp is enough. I’m kind stop doing it now, the end of the day, I need to print 8×10, I don’t think I have enough p-mpix for a sharp print

  4. I love your videos… Would not the surface on which the image is printed be included in the factors of megapixels needed for optimum results? After all, a Canvas Print will never show the detail that can be shown on a glossy surface or even more so on a metallic surface.

  5. the nikon 18-55 kit lens, received a score of more than 2150 in sharpness, more than lenses wich cost double the price. i don't know what u tested, maybe you did it after a few glasses of wine. :))))))

  6. It's all about cost versus benefit. Yes, if I upgrade from my current max resolution camera, which is 24Mpix, to 100Mpix, I will get improvement in IQ, but how much improvement and more importantly – how much it will cost me? Not only to buy the equipment, but also to store and backup the images. How will it benefit me? Is it gonna be worth it? And don't even begin about DXO. They still don't rate Fuji XF system cameras or lenses. So no perceptual megapixels for me.

  7. Tony I have a question and you seem like the right guy to answer it. I have a pentax k-3ii with a 100mm macro lens and a 1.4x teleconverter. The pentax has a 1.5x crop factor and the macro lens shoots 1:1 magnification. Along with the teleconverter, what is my total magnification number at the closest focusing distance on the macro lens with the crop factor of the camera? How do I work out that formula? And what is my overall equivalent crop factor with the camera and the teleconverter?

  8. In a video you said that using a full frame lens on a micro four thirds camera produces less sharp images because the pixel density of micro four thirds is higher than full frame cameras. Am I missing something here?

  9. The 300 dpi came from the printing industry when it started going digital. It’s the metric equivalent of 150 lines per inch. Which is what most of the large printing presses of the day were able to produce to get an a sharp image. In printing a picture is broken down to tiny dots that a printing press can put on paper. Today they have digital presses. I retired from the industry two years ago but as of that time digital presses were not equal in quality but getting there. Sharpness was very important. Because there’s always a loss and sharpness going from one media to another. Copying a digital file to another digital file is an exact copy, no loss. But then going to paper it is now second-generation. And that’s whether it’s a digital press or not.

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