Upgrading F/W On Discontinued Axis Models

I recently upgraded F/W on some old P3344's and a P1346 for a customer running ExacqVision and I was really surprised by the difference in picture quality after the fact. Unfortunately I do not have any before and after shots to share but it made me wonder: How often does a simple F/W update improve the picture of a camera and what changes in the F/W help them get a better picture?

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