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Minolta A1 vs. iPhone 13 Pro, or the king is naked

Started Oct 10, 2021 | Discussions thread
Rishi Sanyal
Rishi Sanyal Contributing Member • Posts: 916
Re: Minolta A1 vs. iPhone 13 Pro, or the king is naked
1

Your setup with 2/3" sensor, 50mm focal length, F4.5, with a min focus distance of - and I'm giving you the benefit of the doubt & suggesting you shot at the closest focus distance possible - let's say 0.5m, gives you a DOF of 2cm.

The iPhone image, shot at about 2cm w/ a 13mm F15.5 equiv lens has a DOF of .08cm, 25x less than yours. In fact, as I'm composing the frame it's wildly changing as the camera-subject distance changes from handshake & subject/photographer movement. Not only is it difficult to compose the frame, it's amazing AF can even keep up. Naturally, I have no control over what's in focus, and manual focus it out of the question.

With that much needed perspective, and taking into account the much smaller sensor on the iPhone, are the results surprising? Or, in context, are they perhaps impressive, if you assess the detail at the focus plane and consider the roughly 25x less depth-of-field than your example?

(Please correct me if I'm off on my calculations or assumptions)

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Rishi Sanyal, Ph.D
Science Editor | Digital Photography Review

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