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Autofocus for the 16mm Telephoto Lens Mounted on the Raspberry Pi HQ Camera
- ketamine__ 6y agoUh, so I have no choice in cookie preferences? Just suck it up and accept it?
- l0b0 6y ago+ instant nag popover. Bye. (To those who always downvote comments about the presentation rather than the content, my hope is that some of the creators of these websites will notice when viewers complain about bad practices and hopefully rectify them, leading to an overall better experience in the long run.)
- sbarre 6y agoYou can close the site and not consume the content.
- pbhjpbhj 6y agoWhich is unlawful if your users are in Europe (and also possibly of they're just from Europe?). You are obliged not to discriminate against users who choose not to be tracked (or whatever).
- bobthebuilders 6y agoDo you have a a link? If you're based in the EU I assume so, but the EU doesn't regulate the world. (At least directly, if you comply with GDPR you're likely to port that over to other regions to avoid possible legal issues)
- sbarre 6y agoSo, theoretically speaking - because I'm not from the EU - if I choose to not comply with that law, is it my responsibility to figure out a technical manner to block EU users from accessing my content, in this global Internet world?
- hackmiester 6y agoJust don’t click “save” - you can still read the article.
- alexchamberlain 6y agoI would prefer sites that don't actually comply with the rules to go the whole hog and not notify me.
- deleted 6y ago[deleted]
- lemariva 6y agoproblem solved, I updated the plugin and it was misconfigured
- SoSoRoCoCo 6y agoAs a maker, this is very impressive. Custom builds with gears and motors sourced from various sites is very, very tricky. Matching bores and tooth pitches is hard enough, but mountings can really take a lot of physical trial-and-error. I tend to default to ServoCity ActoBotix because there is great interoperability, but the tolerances are shaky.
- jstanley 6y agoI've found the easiest way to work with gears is to 3d print my own. That way you can (semi-)easily match them to the shaft diameters and to each other, and you can sometimes make them integral to the things they're driving, if those things are 3d printed too.
- SoSoRoCoCo 6y agoThat's on my list to try! I made a rotational-to-linear translator with adjustable linear depth using 1/4" HDPE and a gigantic OMAX waterjet cutter. The pitches were perfect to within 0.0001", but the design was five layers of gears, some were planetary, others slid on cams. Trying to connect planar gears is very effing hard when you can't use a pass-through collet (e.g., the pinion has to be FLUSH but yet allow rotation).
- alacombe 6y agoI doubt you can get 0.1 thou tolerance out of a water cutter.
- tejtm 6y agoI would suspect GP is referring to precision as amplified through the gear chain
- SoSoRoCoCo 6y agoSorry, I was off by one decimal place. http://info.omax.com/precision http://info.omax.com/precision Average of ±0.003" (±0.08 mm) and up to 0.001” (±25 µ) About the same as a laser cutter. You set it to cut very slowly and it angles the head to account for motion and material deformation (you need to program the type of material).
- anonymousiam 6y agoHow did a 16mm lens become a "telephoto"? That sounds like a fish-eye focal length to me.
- miahi 6y agoIt depends on the sensor size. 16mm in this case is not the 35mm-equivalent.
- pmiller2 6y agoThat’s kinda misleading. DSLR lenses have been quoted at 35mm equivalent focal lengths forever because that’s what makes sense to photographers.
- auxym 6y agoActually, they haven't? All Canon EF-S lenses (so aps-c only) are marketed solely by the actual focal length and not the FF equivalent. To the best of my knowledge, it's the same in other brands, even in micro 4/3.
- pmiller2 6y agoSo, wait... are you telling me that my Nikkor 105mm f/2.8 macro lens is really acting like a ...uses 35mm equivalent calculator... 160.65mm f/4.28 on my D3400? Edit: updated to clarify exactly what calculation I was doing.
- deleted 6y ago[deleted]
- dukeofdoom 6y agowould be cool to pair this with AI to snap photos of specific animals or birds. As a trail camera or a bird feeder camera. For example record only Blue Jays or Cardinals. If it could spin around to capture action that would be great too.
- supernova87a 6y agoBy the way, maybe this is a slight off-topic (but parallel topic) -- will availability of cheaper Lidars make autofocus an easier / better solved problem some time in the future? Or is this not such a problem to bother with the expense of a Lidar? If you know exactly the distance to something you want in focus, and it no longer has to be "solved" by phase detection, or edge sharpness? Or is this even already being used with phones having Lidars built in? I guess if your lens isn't perfectly distance calibrated then it fails though.
- mikeytown2 6y agoSony and Canon both have phase detection on the sensor. it's fairly accurate and would serve the same purpose as lidar, get really close to perfect focus so contrast detection af can bring it to perfect focus fairly quickly.
- noughtme 6y agoWondering why the autofocus couldn’t be done by the Pi itself, rather than an M5Stack. Does the Pi not lend itself to real-time applications?
- lemariva 6y agoThat can be also done. The pins are there (as you can see on the board design). I just wanted to separate the threads. It was easier to control the steppers with the M5Stack.