It’s repurposed here, used as an easy way to fit a Raspberry Pi camera to a CNC tool head through its mounting holes. To achieve a bargain focus stacking rig, used a Dremel tool mount for cutting discs. For this, a CNC machine excels, as it’s designed to move tool heads in very tiny, precise movements. To focus stack effectively, it’s desirable to move the camera in very small increments of sub-mm precision, in order to get different parts of the subject in focus. To help achieve this, realized that garden variety CNC machines would be perfect for the job. This involves taking many photos at different focal lengths and digitally compositing them together. Unfortunately cameras have poor depth of field at close ranges, so to get around this, many use focus stacking techniques. Macro photography is the art of taking photos of things very close up, and ideally at great detail. You can also adapt an existing motion control device like a CNC machine.Ĭontinue reading “Better Macro Images With Arduino Focus Stacking” → Posted in Arduino Hacks, digital cameras hacks Tagged focus stacking, macro photography Skip ahead to 32:22 in the video below to see the final result. Fittingly, the example subject is another Arduino Nano. In fact, we wondered if you couldn’t just grab a 3D printer board and modify it for this service without spinning a custom PCB.
#Dlsr focus stacker driver
The stepper motor uses a conventional stepper driver “stick” as you find in many 3D printers. An Arduino Nano acts as the brains, a stepper motor drives the lead screw, and a small display shows stats such as current progress and total distance to move. This build relies on a solid-looking lead screw to move a carriage up or down. Either way, you really only need one axis of motion, which makes it quite simple. You can move the camera or move the subject. As demonstrates, this is a relatively simple motion control project and well within the reach of a garden-variety Arduino. One way around this issue is to take several slices at different focus points, and then stitch the photos together digitally. If you’ve ever played around with macro photography, you’ve likely noticed that the higher the lens magnification, the less the depth of field.
doesn’t mention how the actual stacking is being done, but this CNC-based focus stacking project mentions a few utilities that take help with the post-processing.Ĭontinue reading “Quick And Dirty Microscope Motion Control For Focus Stacking” → Posted in Misc Hacks Tagged 28BYJ-48, arduino, dslr, focus stacking, microscopy, motion control, uln2003, ws2812 We could do without the extreme closeup of that tick - nasty little arachnids - but the ant at the end of the video below has some interesting details.
#Dlsr focus stacker code
The code is very simple, and the setup is quite temporary looking, but the results are pretty impressive. There’s also lighting control, with an RGB LED ring light that can change both the light level on the sample as well as the tint.
Focus control is through a small stepper motor connected to the fine focus knob of the scope, while the DSLR camera shutter is triggered through a simple relay board. Rather than twist knobs and take pictures manually, he built a simpler Arduino-based rig to do the job for him.
#Dlsr focus stacker mods
The goal behind ’s microscope mods is “focus stacking,” a technique where multiple images of the same sample taken at different focal planes can be stitched together so that everything appears to be in focus. It’s tedious and fussy, and that makes it a perfect target for automation. Most microscopes are designed to only have a very thin slice of the specimen in focus, so looking at anything above or below that plane requires a focus adjustment. If you’ve spent much time looking through a microscope, you know that their narrow depth of field can be a bit challenging to deal with.
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