Hello fellow photographers. I am a 70-year-old retired aerospace software engineer. To keep my brain from going to mush I write apps that I use for my personal use for the PC and iPhone. I have been a photographer for the last 45 years. I do not charge anything for my apps, I just wanted them on my iPhone while traveling. I have written a neutral density app that calculates the shutter speed to use when using a ND filter. Search for “nd filters calc” in the app store. Enjoy.
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