so, I'm an archaeologist by trade, and we're (generally speaking) sort of technology bottom-feeders, so my apologies for the lack of familiarity with what seems like should be a straightforward situation.
I have a 5.4mm replacement lens on a 3+ Silver and it works extremely well:
I've noticed jello/chop on video in 15+ mph wind, but the stills I've gotten at 0.5s interval look great.
I'm running into problems understanding the specs though, or at least how to use them to:
- create camera calibrations for Photoscan and Pix4D
- create a custom camera profile xml for 3DRServices/Tower
I know how to create and place an xml so that Tower recognizes it *as detailed elsewhere on this site), and I know how to do camera calibrations for Photoscan and Pix4D, but I don't really understand what's going on with the specs and how to convert them.
Performing a 3D Calibration with Pix4D, tells me the focal length of the new lens om the GoPro is "2.6333", as opposed to the stock which reads as 2.77. I'm ashamed to admit, I would have expected that number to be 5.4, but I know there's a relationship between the 5.44mm and the f/2.5 that I'm not getting.
To further complicate things, the camera profile .xml for 3DR/Tower looks like this:
At the end of the day, I'd really like to know:
- In Photoscan and Pix4D, do I change the "focal" length to 2.633 (as calculated) rather than 5.44, (which is what I originally assumed, but now think is wrong)
- I don't have the faintest idea why the 3DR/Tower xml focal length value is set to 14 for a stock GoPro, but what on earth would I want to set it to based on the Peau replacement lens?
thanks for any insights anyone might have the time to provide!