I hooked up the Raspberry Pi to my home network via my AirPort Express via an Ethernet cable. Once complete, I unmounted the SD card and inserted it into the slot on my Raspberry Pi. iMac-2:~ khurt$ sudo dd bs=1m if=~/Downloads/-wheezy-raspbian.img of=/dev/rdisk4 In the terminal I wrote the image to the card with this command, using the raw disc device name from above. Using the device name of the partition, in my case /dev/disk4s1, I got the raw device name for the entire disc, by omitting the last "s1" and replacing "disc" with "rdisk”. It is necessary to unmount the partition so that you will be allowed to overwrite the disc: iMac-2:~ khurt$ sudo diskutil unmount /dev/disk4s1 I was frustrated running these commands until I understood that little detail. The Wiki did not make it clear that I needed to issue the commands from an account with system administrator privileges and that the diskutil commands must be executed using sudo. A little trial and error and I had a working RPi. I followed the instruction on the Wiki but with some small tweaks. The card was mounted on my OS X 10.8 iMac via a Moshi card reader. I used an OS X user account that has administrator privileges to install Raspbian “wheezy” Linux onto a 4GB SD card. Installing Raspbian “wheezy” Linux on an SD card Mophie Juice Pack Powerstation battery pack.I planned to use the Raspberry Pi to control my Nikon via USB and capture bracketed images.Īfter much research and trial and error, I think I have a working solution. I ordered one and four months later I could start working on my first project. When the Raspberry Pi single-board computer was announced I could immediately see the usefulness of such a small. Most of my test shots were completely blown out in the highlights. However, the author of the app limited the fastest shutter speed to 3⁄ 10 second. The creator sells a pre-built IR remote but I built one myself. The creator wrote an iPhone/iPad (iOS) app that could trigger an IR LED to send the correct binary sequence to trigger the IR on the Nikon. Searching the web I found a project called DSLR.bot. I started researching options to control the brackets using my iPhone. I just didn’t see myself lugging a laptop, tripod, camera, and lenses around. Sofortbild is easy to use and fully functional but … the setup wasn’t only practical in a studio or controlled set. Filenames will get the same index including incrementing suffix for easier workflows with external high dynamic range applications. After bracketing high dynamic range images can automatically be calculated including auto image alignment and saved in all major high dynamic range image file formats. Perform bracketing with an arbitrary number of exposure values by defining the minimum and maximum shutter speed and step. However, I was interested in its use for HDR photography. It can also auto-import images into iPhoto, Aperture or Adobe Lightroom. Sofortbild provides complete remote control of a Nikon DSLR camera - like shutter speed, aperture, exposure, white balance, iso, image format - and automatically transfers captures images to the Mac hard drive. I used a Mac app, Sofortbild, to tether my D40 to my MacBook via USB. I’ve researched various solutions for my problem. A slight movement can make aligning the images much harder. On the D40 I can manually adjust the exposure values (EV) between each capture but I risk moving the camera. Having a camera body with auto-bracketing makes this easy. HDR photography requires a good tripod and a camera that can shoot bracketed photos. HDR photography involves taking multiple photographs at varying exposure levels and combining the photos into a single final image. I love how my photographs come alive with the expanded range offered by HDR. I love making high dynamic range (HDR) 2 photographs. I’d had to make do with the limitations of the D40 - 6-megapixel DX sensor, 200-3200 ISO range, no auto-bracketing - but the lack of auto-bracketing has been the most limiting. Over the last 6 years that I've owned the device my photography skills have improved but not my budget 1. At the time, it was Nikon's entry-level DSLR and it suited my budget and photography skills. The D40 is my first and only DSLR camera and I've loved using it every day that I've had it. UPDATE: See my new blog post where I rewrote the code in Perl and added a trigger for the Pi.
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