At first, I wasn’t pleased with this app. I had purchased it to try to stack photos of images viewed at 1000x through a microscope. I am using these photos in scientific research and needed a fast/simple way to get more depth of field and an increased appreciation of the 3D structure of the objects I was viewing. The reason I wasn’t initially pleased is that I was trying to use the app to stack three separate images that I had taken while manually adjusting the focus on the microscope and holding the phone in my hand when I took each photo. The app is actually terrible at stacking those images (but so is much higher-end software used on desktop computers). However- once I bought a cheap adapter used to mount the phone to the eyepiece if the microscope, and once I started capturing images using the built-in “auto capture” feature where the software directs the camera to take three images at slightly different focal lengths- I started getting exactly what I needed from the app. I now use it for almost every image I take through the microscope, and I am able to get soooooo much more information from those images about the 3D structure of the organism I study in my research. I’ve found that the “fine detail”!setting doesn’t work at all (is haven given 4 1/2 stars because of that), but even with the more rough version of the stacked image, I’m getting so much more information than I was before I started stacking... that I’m not worried about the high-resolution processing not seeming to work for me. I’ve never tried using the app for anything other than microscopy work, so I can’t comment on its usefulness for other macro photography etc.... also, I’ve found it is really the most useful when I am looking at images at very high magnifications (400-1000x). The app is capable of processing the stacked image in just a few seconds... so it is much faster than a computer-based software program in which the photos must first be uploaded etc... Given the very limited options for iPhone-based stacking apps... this one has been a Godsend for my work and would be a huge help to anyone taking photographs through a microscope. (Just make sure the camera is mounted to the scope so there is zero change in position during capture of the three images).
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