Infrared Conversion: 4/3 micro vs. Crop vs. FF sensor?

Started 3 months ago | Questions thread
robgendreau Veteran Member • Posts: 7,806
Re: Hot spots: Function of DoF? Or fstop value?
3

nkistrup wrote:

Only occurred to me this morning. For a given lens on a 1.5x crop, it has same DoF as a full frame camera, a full stop higher. Example: f5.6 on a 1.5x crop is the same DoF as f8 on full frame. So if a hot spot shows at f16 on full frame testing, it will show up at f11 on a 1.5 crop?

Or are hot spots a function of the aperture blades of the lens, which are constant for a given fstop value? Curious.

Tough question. See https://kolarivision.com/the-science-of-infrared-hotspots/ eg.

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