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Measurable values are for the birds. Give us subjective pictures. (*sic)

-Josh

Thanks for the math Barry. I've seen this discussed with numbers in the past, but have always hoped to see a field test with side by side comparisons of each sensor size DoF. Although, I've shot with most and have a pretty good idea what it would look like, but still think it would be nifty to see.

"For a 1/3" camera to match to 2/3" - open up 1 2/3 stops."

That isn't much difference. The other factor is the length of the lens. I've always thought that with only an 8x zoom the fixed scarlet isn't going to beat an A1 in DOF with a 20x zoom.

In fact, my rough calculation before was that an 8x fixed Scarlet at full zoom is about the same as an A1 at 3/4 zoom (16x) at the same aperture. Or at the same zoom its 1 2/3 stops different albeit with a change in the FOV. Not a huge difference.

Of course 1/3" sensors with only 10-14x zoom will be beaten in DOF control by the Scarlet all the time.

If that's right then an A1 will beat a fixed scarlet for DOF control at the far end of the zoom, if you have the room to back up.

Another factor is whether the A1, which goes to f1.6, will go wider than the Scarlet fixed. I heard a rumor of T3, which is about f2.8. Thats approximately a stop and a half and DOF difference is listed here as 1 2/3, which is pretty close right off the bat. That would make wide angle DOF very close in both cameras, and the tele DOF better on the A1.

The Scarlet fanbois will probably be sharpening their pitch forks and getting out their torches for that statement, but resolution should be another matter.