Michaelpop84
lvl.3
Flight distance : 264354 ft
Luxembourg
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Just got my new DJI RSC2. Great product. Besides video, I bought it also to make 360 panos, but found that as it is, it can't be used for making 360 panoramas, therefore I have some questions to those who already tried, and in the same time some improvement requests to @DJI
1. For 360 panos, the most important thing is setting the NPP - No Parallax Point. Or Entry Pupil. The point where the image is projected/inverted, which is usually at some point in the lens, not at its tip, not at the sensor, as seen in the image below which shows the NPP from 3 angles.
As the RSC has to be balanced AND the tilt motor+arm are on the side where also the DSLR is heaviest, the vertical axis NPP can't be met. Same for the horizontal axis, due to the balance the camera is way more forward than the NPP. See the two images below. Green is where the NPP should be, red is where the axis is now, sorry for the lines not being straight as I just handsketched them quickly.
This small shift means a lot for 360 panoramas, resulting in huge stitching errors as this for example:
The question is if other users managed to solve this somehow. Maybe by adding some balast weight to the left and rear in order to compensate and balance the camera in the correct NPP? DJI, what's your opinion, how could this be solved, to shift the camera to the right position? If the tilt motor/arm would only have been on the other side...
2. Second question, rather app improvement suggestion, which is directly related to DJI's Ronin app:
this is the pattern generated by the app to make a 360x135degree panorama, with 8mm and with 15mm lens, 30% overlapping:
This means 5x3 and 7x4 photos. In reality, a lot less photos are needed. 8 shots for 8mm, 15 shots for 15mm. The Ronin app takes 15 and 28photos. The best simulation can be done on https://panocatcher.com/panoplanner/ which can help you optimize your algorithms.
Things change even more if one uses a fisheye lens. For the 8mm focal length, only 4 photos are needed. For 15mm, 9 are needed. As you can see, way less than for "normal" lens. Therefore, I would kindly suggest that you also add a selector for normal vs fisheye lens, as you did the selector for full format vs other sensor formats. And please inspire from https://panocatcher.com/panoplanner/ which is very accurate! Currently, the pattern is very bad. For example it looks up (+90 degrees) and makes 4 photos. Absolutely useless making 4 photos at +90 for a panorama, they all "see the same".
Looking forward for your inputs!
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