In a group on Flickr I saw someone asking about the Depth of Field of a Polaroid Land Camera, which made me wonder for myself. So I posted the following:
Good question, I hadn’t considered looking at a DoF table for my land cameras so you got me thinking! I have an app for the iPhone called ‘PhotoBuddy‘
This includes a DoF calculator and the ability to choose various camera systems. Unfortunately Polaroid Land Camera isn’t listed, BUT you can enter your own custom film size.
I entered film size 107.95mm x 82.55mm (4.25″ x 3.25″) and then a focal length of 114mm. (36mm is the 35mm equiv. focal length, which feels about right!)
f-Number a either f/8 or f/9 (there’s no f/8.8 available).
Here are some results:
100cm subject distance – 95.1cm near | 105.4cm far (DoF 10.3cm)
150cm subject distance – 138.9cm near | 163.1cm far (DoF 24.2cm)
200cm subject distance – 180.3cm near | 224.5cm far (DoF 44.2cm)
I’m not sure if these are correct or not, let me know if you agree or disagree in the comments below.