Mobius
activity:mobius

The Public Lab community has been using variants of the Mobius ActionCam for aerial photography purposes for some time, and has also used this as the basis of our Infragram Point and Shoot camera. The purpose of this page is to provide an overview of operation for these cameras, specifically as an aerial mapping tool. ## Questions [questions:mobius] ## Activities [activities:mobius] **** ## Lenses ### Model A From the factory, the Mobius has a couple options, including the Model A, which has an 87-degree field of view. This is the __least__ fisheye option from the sales channels, such as Amazon or Mobius-USA websites. We offer this camera in the PL store, and this is the model we have modified as part of the Infragram Point and Shoot camera (where they remove the IR cut filter at the factory, and replace with our red gel for NDVI photography. ### M12 Security Camera Lenses The Mobius was designed to take a standard "M12" threaded lens, which makes it simple to swap out the kit lens for any of a number of lenses available online. @pcoyle posted some research around finding the best options for aerial mapping, and you can find those notes [here](https://publiclab.org/notes/patcoyle/08-01-2015/mobius-non-fish-eye-lens-conversion). Based on this research, we decided to offer Mobius cameras pre-fitted with 6mm lenses [found here](http://store.publiclab.org/collections/mobius-actioncam), installed at the factory. We also offer 8mm lenses as an alternate. ## Exchanging Lenses this involves opening the camera, then using the small hex driver (provided) to loosen a set screw. This will allow the original lens to be unthreaded and exchanged. Photos and tutorial on exchanging lenses to be created soon, but for now, you can find this information readily on youtube, examples [here](https://www.youtube.com/watch?v=-dZRjscVtkA) and [here](https://www.youtube.com/watch?v=c0rfPHh01NA). In order to focus the lens, you can view the camera in a live-view mode, a.k.a. webcam mode, and manually adjust the focus. Once the focus is set, you can choose to lock the focus in place, or to leave it unlocked before closing the camera body housing. Locking it will prevent accidental loss of focus, but will limit you to the one focal setting. In aerial applications, this is preferable, leaving focus locked at infinity. In some operations, you may want ability to focus on nearer objects. ## Camera Operation [![mobius-demo.jpg](//i.publiclab.org/system/images/photos/000/013/845/medium/mobius-demo.jpg)](//i.publiclab.org/system/images/photos/000/013/845/original/mobius-demo.jpg) This is the basic instructions we ship with the camera, explaining the custom default settings we install, and enough info to get you going. The Mobius has three main modes of operation. You can toggle between these modes by pressing the "Mode" button (signified by "M" on the button). The modes are: * Photo mode (Red) * 1080p Video (Yellow) * 720p Video (Blue) We modify the firmware and system configuration before selling these cameras to optimize them for aerial mapping purposes. Specifically we: * set the default mode to "Photo" * set the photo mode to a 5-second intervelometer, at highest resolution * allow locking white balance and exposure by pressing and holding "mode" button for 3 seconds * setting camera to turn off automatically after 2 minutes of down time. * turning off the time/date stamp ###Setting balance and exposure It is ideal to lock both white balance and exposure prior to taking a large series of photos, especially if you plan to later "stitch" these photos together, as inconsistencies in the exposure settings can make the job much more difficult. You can set custom white balance and exposure for the duration of an entire flight by simply aiming the camera at the grey card provided (or any 18% grey card or equivalent), in lighting conditions as close to your flight as possible. Make sure the camera is turned on, and in standby mode (not taking photos). Top LED should be a solid red. Then hold down the "Mode" button for 3 seconds, until the camera LED light turns off. Release the "mode" button, and your exposure is now set. ## Mounting the Mobius camera for flight There are many ways to attach a camera such as the Mobius to a flying line; one of the biggest advantages of such a camera is that its light weight and tiny form factor allow it to be easily rigged up. Here we will give a couple of the most direct options, using common materials. You can post your own solutions, and find many others under development, by looking at Public Lab research notes with the tag: pendulum-rig. ## Customizing the configuration file and firmware. We ship the camera with the current version of firmware. You can find the most up-to-date version here, and if you see a discrepency between this and our version, please let us know by emailing kits@publiclab.org. We might have missed the update! The coinfiguration file can be edited in a few ways. There are graphical tools available to let you edit the configuation file on your camera, available for Mac and Windows systems. The most direct way is to edit the file directly using a text editor program, such as Notepad for Windows ## accessories some accessories that look promising, currently available from third-party vendors (links provided as example, not we don't actually recommend anyone in particular). ###lens extension cable ###silicon housing ###AV Out cable (for live view applications) ##other relevant links and notes link here to other links and tags on PL and beyond....


Author Comment Last activity Moderation
jhondue123456 "https://www.google.com/ " | Read more » 2 months ago
ClairKag "Dear friends, We will create your own cryptocurrency and NFT for your projects! (NFT,DND,ERC20,BEP20,Polygon,Heco,Arbitrum,Moonriver,OKC,BOBA,Optim..." | Read more » almost 2 years ago
mutski "Hi Warren. I am interested in your kite-mapping camera rig for mobius or gopro, made from corrugated plastic: https://publiclab.org/notes/warren/0..." | Read more » over 3 years ago
warren "OK, we just did the GitUp 1 -- https://jywarren.github.io/fisheyegl/example/#a=0.989&b=0.98&Fx=0.05&Fy=0.14&scale=1.036&x=1.00..." | Read more » almost 5 years ago
warren "awesome! On Wed, Aug 8, 2018 at 5:06 PM \<notifications@publiclab.org> wrote: Hi! There's been a response to your research note 'Make a lig..." | Read more » almost 6 years ago
zengirl2 "@warren thanks so much for this--going to come in handy for my workshop in Oct! " | Read more » almost 6 years ago
stevie "This is Awesome!!! Just getting to test it out now. Thanks so much for putting this together and posting the walk through :) " | Read more » about 6 years ago
warren "Folks on the #nasa #aren project sent in this image and we corrected it on the call: Lightdow LD6000 WiFi 1080P HD Sports Action Camera https://w..." | Read more » almost 7 years ago
warren "Ah! And i realized another feature i forgot to mention -- you can now see the model of camera used to take the photos, which is extracted from the ..." | Read more » almost 7 years ago
warren "Thanks, Pat. Also, I found a good example of lens distortion with straight lines (a parking lot) on MapKnitter just now: https://mapknitter.org/ma..." | Read more » almost 7 years ago
patcoyle "Thanks Jeff, I did my test on iMac (24-inch, Early 2009) with Graphics shown as: NVIDIA GeForce GT 120 256 MB. " | Read more » almost 7 years ago
warren "And a more final version of FisheyeGL is up here now! https://publiclab.org/n/14792 " | Read more » almost 7 years ago
warren "Awesome! I'll just copy in your notes so they're searchable on the site: I saw Jeff Warren’s note, so gave it a try. I’ve used some of the other t..." | Read more » almost 7 years ago
patcoyle "Nice Jeff. Here is a replication, but didn't think it warranted a note, see results in slides " | Read more » almost 7 years ago
warren "Hi, @patcoyle - managed (with some help) to get the web-based lens distortion removal system working, and worked out some rough settings for Mobius..." | Read more » almost 7 years ago
cfastie "I like #4 too. I don't have a good answer for the type of glue. Something thick and quick drying. It does not have to be sticky, it just has to for..." | Read more » about 8 years ago
talha "Thank you very much for your quick and informative answer, Mr. Chris. Among those choices, which one do you suggest? To me, #4 looks ideal (light c..." | Read more » about 8 years ago
cfastie "The new filter can be put several different places: stick it on the front of the lens. Build a frame to hold it in front of the lens: https://pub..." | Read more » about 8 years ago
talha "I'm getting crazy, there is massive amount of talk about mobius conversions but there is no single guidance for converting the mobius for ndvi. I'v..." | Read more » about 8 years ago
Matthew318 "Using a heat gun allowed a clean removal of the filter, much easier than smashing. Would recommend just getting a $20 heat gun from home depot. " | Read more » about 8 years ago
tonyc "Pat, we are going to be getting samples of Mobius cameras from the factory, preinstalled with 6mm and 8mm lenses. Hoping to be able to sell these t..." | Read more » over 8 years ago
Jimo1966 "Yes! Glue can be remove easily with Heat Gun and a Sewing Needle. Smash to bits is never an option. (or the last one) I filed down I tiny screwdriv..." | Read more » about 9 years ago
blkswanpres "You can remove the ir filter on the mobius by using a heat gun to melt the glue and screwing the unit out, you can then hit it with heat again to p..." | Read more » over 9 years ago
eustatic "sweet cup rig have you all seen that there's a waterproof case for mobius action cams that includes a heat disperser? i'm sure it costs as much ..." | Read more » over 9 years ago