Canon FD lenses on an EOS mount

Camera lenses are expensive and if you’re like us, you can easily find really cheap lenses that your camera can’t use. [Sam] has a Canon EOS and a bunch of old-school FD lenses at his disposal. There’s one problem though: using these old lenses with an adapter means focusing at infinity is out of the question. Thankfully, he put up a few videos (part 1, part 2, and part 3) walking through the process of modifying an FD lens for his new camera.

To do the modification for the FD lens, all that’s needed is some epoxy, a screw driver, and an M42 to EF adapter. After disassembling the back of the FD lens, [Sam] mounted the M42 adapter on his camera and held the lens up to check the minimum focusing distance. A bit of grinding or a few metal shims ensure that the lens is in the right position.

The next step is making sure the aperture can still be controlled. [Sam] goes through this in part two of his video. A little bit of dremeling takes care of all the hard work. The lens is finally attached to the M42 adapter with a tiny bit of epoxy, and the conversion is complete.

While [Sam] could have put up a few close up pics of his build, he goes through every step of the process very well. Check out the embedded videos after the break.

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DSLR focus stacking assistant takes the hard work out of macro photography

canon_dslr_focus_stacking_assistant

Focus stacking makes for fantastic macro images, but the process can be tedious without the right tools. While some focus stacking rigs require the camera to be moved away from the subject in small increments, others choose to keep the camera stationary while focusing the lens before each shot.

Both methods produce great results, but you need a steady hand and a lot of patience to get the job done. [Oleg] uses the focus stacking technique relatively frequently, so he decided to automate the process in order to save himself some time. Using an Arduino and a USB host shield from Adafruit, he put together a focus stacking assistant for his Canon EOS camera.

The assistant allows him to set two focal points, leaving the Arduino and his camera with the task of taking pictures. The Arduino commands the camera to tweak the focal point ever so slightly between each image, resulting in an array of images ready for stacking.

He says that the process is a bit slow at the moment, but he’ll be cleaning up the code and building a Nikon-compatible unit in the weeks to come.

Robust wireless DSLR control over Bluetooth

yanis_android_bluetooth_camera_controller

[Manishi] wrote in to share his latest project, a Bluetooth DSLR controller that works with Android. More than a mere Bluetooth shutter trigger, his device lets you control a wide array of other settings such as aperture, shutter speed, ISO, white balance, focus position and live view.

His “YaNis” control system was built using an Arduino Pro Mini, along with a USB host shield and a Bluetooth module he picked up from SparkFun. Obviously any other Arduino and SPP compatible Bluetooth board can be used, though component size is definitely a consideration for this project, and his selections are pretty well-suited to the job. The Arduino half of the software relies heavily on [Oleg Maruzov’s] PTP/USB libraries to get things done, but the free Android control app is all [Manishi’s] creation.

The Bluetooth dongle connects to the camera via USB, and once it’s paired with his Android phone, [Manishi] has total control at his fingertips. He has plenty of improvements planned for the near future including additional camera support, so we expect that we’ll see an even more robust control application before too long.

Continue reading to see a quick video demo of YaNis in action.

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Tiny hardware-based DSLR intervalometer

diy_dslr_intervalometer

Most DSLR cameras have the ability to take pictures at set intervals, but sometimes the menu system can be clunky, and the options are often less than ideal. [Achim] is a big fan of time lapse photography and has been hard at work creating a hardware-based intervalometer to suit his needs. He has just finished the second revision of the controller which is just about small enough to fit inside the housing of a 2.5mm stereo plug. The timer is not 100% universal, but so far he has confirmed it works on Nikon, Canon, and Pentax cameras.

Based on a PIC10F222, the circuit’s operation is quite simple. Once the dongle is connected to your camera, you simply need to take two pictures anywhere from 0.4 seconds to 18 minutes apart. The intervalometer “watches” to see how long you waited between pictures, and proceeds to take shots at that interval until the battery dies or your memory card fills up.

As you can see in the video on his site, the timer works a treat. If you want to make one of your own, swing by his site to grab schematics and code – it’s all available for free.

*Whoops, it looks like we’ve actually covered this before. Our apologies.

Canon A70 CCD replacement/repair

Looking for an underwater camera setup, [Imsolidstate] picked up a Canon A70 and a Canon water-tight housing on eBay for around $45. Unfortunately the camera arrived with a non-functioning CCD. Another trip to the online auction site landed him a replacement CCD which he set about installing.

We have this exact model of camera with a cracked LCD display. Being that we like to hack around on things we’ve pulled it apart in order to replace the screen and believe us, there’s no extra room inside that thing. The video after the break shows the teardown, and you can see what a pain it is to get the unit apart. That process in only eclipsed in difficulty by the reassembly itself.

In the end it wasn’t a problem with the CCD itself, but with the connector on the PCB that received the flat cable. It wasn’t holding the contacts tight, but [Imsolidstate] fixed that with a strategically placed piece of foam.

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Laser-powered DSLR auto focus assist light

laser_af_assist

[Adrian] uses his Canon 40D quite often in dark or low-light situations, and found the onboard auto focus assist functionality to be a bit frustrating. In certain focus modes, the auto focus assist light is programmed to turn off once focus has been achieved. He noticed that if his subject moves or the focus point changes before he snaps the picture, the AF light does not come back on to assist in refocusing the image.

To work around this problem, he decided to build a supplemental auto focus assist light that could be triggered at will. He purchased a cheap laser pointer with an adjustable lens, then cut it open to get at the good parts. He mounted it on top of his camera and tweaked the lens to produce an unfocused beam of light that measures about 6” x 12” at five feet.

The laser pointer did the trick – his images are coming out much nicer now that he can easily recompose his shots in low light. While it works great, he’s not completely satisfied with the build, especially with the fact that he has to manually trigger the laser pointer.

Version 2 is in the works however, which employs an old hot shoe to trigger the laser whenever he pushes the shutter release halfway down. According to his blog he is having some timing issues, causing him to capture the laser in most of the pictures he takes. [Adrian] is working hard to correct the problem, and we’re sure he’d appreciate any tips you might have.

Make a point-and-shoot see infrared light

[Daniel Reetz] has caught the Kinect hacking fever. But he needs one important tool for his work; a camera that can see infrared light. This shouldn’t be hard to accomplish, as the sensors in digital cameras are more than capable of this task, but it requires the removal of an infrared filter. In [Daniel's] case he disassembled a Canon Powershot to get at that filter. There’s a lot packed into those point-and-shoot camera bodies and his teardown images tell that tale. He also ended up with extra parts after putting it back together but that didn’t seem to do any harm.

After the break you can see video that shows the Kinect’s speckled IR grid, which is why he needed IR sensing in the first place. But there’s also some interesting photos at the bottom of his post showing the effect achieved in outdoor photography by removing the filter.

The flash never made it back in the camera. That’d be a perfect place for an IR light source. You’d end up with a night-vision camera that way.

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