Canon VR Scale in Passthrough

metichemsi

I have been making my own personal PT videos using a stock canon VR lens and have noticed a few interesting things. In my recent video I shot we were both about 3 feet in front of the camera, standing up so it was not a POV shot at all. And while the general consensus is that the stock canon VR lens definitely scales larger than real life due to the PID distance of its lenses, its actually quite interesting how subjects more than 3 feet away from the camera in PT mode actually seem smaller in scale than in real life. I have also tested some POV shots in PT and standing shots with the camera maybe 1-2 feet away and the scaling still seems larger than real life. It seems to me like regardless of the IPD of the system there is an inherent sweet spot distance from any system that should yield a realistic scale. I have not done any technical distance testing at this point but it almost seems like that subject sweet spot for the stock VR lens is somewhere between 1-3 feet away. For the SLR team, just curious if anyone has any insight into this. This specially struck me surprising because I do remember noticing that scenes shot with the K2 pro where the subject is further away from the camera the scaling seems way smaller than real life. I've also seen some PT videos on DEOVR by a team in south america who has been shooting with a modified canon VR lens and the scaling still seems small. I think is a PT video of some chick teaching salsa dancing. I'm curious how far away the camera was from the subject and if she should have been closer even if it was shot with a modified VR lens which is supposed to have the correct scaling. Apologies if this is already something well documented or know in the PT and scaling discussions, but as I continue to test making my own PT videos it almost seem assuring to know that if I concentrate on shooting content at a specific distance range, then even a stock lens should present a realistic scale regardless of the IPD. Thanks

StanShortfilms

Of course, the further you go, the smaller the size, because the further you go, the smaller the stereo effect, which means the less volume you will see and perceive.
Therefore, when viewing at a distance of 1-3 feet, you see the maximum stereo effect, since the parallax for each of the eyes is maximum, and the object is not close enough.
As for viewing in a standing mode, in addition to the scale itself due to the lenses, the feeling of the height of the camera is added. For example, if the camera is located higher than my height + if I watch content while sitting in a chair, of course the model I’m looking at will seem short, since I’m used to seeing girls of a similar build at a different height. Also on the other side.

metichemsi

StanShortfilms That all makes sense for stereo distances but I was more interested to hear if anyone had done some testing or had insight specifically regarding optimal scale by distance based on the IPD of the camera. I get that the stock canon lens will probably never work for POV shots with subjects closer than 1-2 feet because they really do look larger but somewhere between the 2-3 foot distance the scale is spot on. Something which I think would be pretty important to people who dont have the luxury, data, or skill to modify their stock canon lens. I personally think it's something important that people who own the lens should know and are just as critical about its scaling issues, if you film at a proper distance with it then the scaling is perfectly fine.

On the point regarding the height of the camera. This was something else that I found odd but will need to do another test at a closer more appropriate distance. I filmed with the camera exactly 44 inches off the ground facing straight forward because that is the exact height of my pupils from the ground when I sit on my sofa by my desk. When I watched the PT footage, even though my eyes were exactly 44 inches off the ground it still seemed like my PT subjects were floating above the ground. This is probably largely due to the fact that we were over 3 feet away from the camera and so that stereo effect was largely at play so I will need to test this out with a standing subject about 2 feet away or so next time and see how much better the PT subject is in relation to the actual floor in PT mode when viewing from the exact same height as I filmed.

petermc

It’s not just the scaling of the girl that was the issue though. Everything was distorted. Objects were larger than life, the floor was too far away like I was 10 ft tall. Pictures on the wall looked like they were curving out from the wall towards me like a convex effect. The same convex distortion applied when looking at the girls ass in doggy style, it looked all misshapen. It also often felt like my head was floating 2 ft in front of my body. Was basically a disaster all round!

StanShortfilms

What video are you talking about?
Bulging and bending of the walls is not a correct mesh.
The perception of height is indeed a problem that depends on many individual factors. For example, the relationship between the actor’s height and yours.