Re: basetobase mounting for Sony RX100 #twinrig #sony3drigs
George Themelis
Yes, you are approaching this the correct way.
Here is an example from my own shooting: When I use my phone to take single camera stereos, I use an app that calculates the deviation. If I want to end up with stereo pairs with about 3% deviation, I aim for something smaller than that (2% or 2.5%) because I know that, after cropping, the deviation will increase.
George
From: David_in_VA
Sent: Thursday, June 17, 2021 11:03 PM To: main@photo3d.groups.io Subject: Re: [Photo3d] basetobase mounting for Sony RX100 #sony3drigs #twinrig
Thank you, George. That helps a lot. See if this makes sense: The "rule of 30" says that if the scene includes an infinity point, the nearest object should be (at least) 30 times the distance between my cameras. But if I know that I am going to enlarge the stereo image, then I should increase the nearobject distance (when I take the photo) to 30 times the new stereo base value as calculated from the formula (including the enlargement factor, or the equivalent increased focal length). Alternatively, I can crop off the nearer objects until the distance to the nearest remaining object is 30 times the new stereo base. Is that a valid use of the formula?

