So a f/1.8 on a 1" sensor would still gather more light than a f/3.5 on an APS-C?

alfn wrote:

PhotoTeach2 wrote:

The point is that I do NOT CARE about NOISE (until it becomes noticeably objectionable).

And I do NOT CARE about DOF because there are both advantages and disadvantages to both shallow and deep DOF. But overall I prefer deeper DOF because I can create shallow-DOF when needed, (selectively and controllably.

At f/1.8 I can use either a lower-ISO (for less noise if that is a factor).

or

I can use 2-stops faster shutter-speed, (which may often be very critical).

I BINGO that too-many here are obsessed w/ noise and (shallow) DOF. I support the ability to shoot at higher-SS @ lowest ISO, (for greater DR).

DITTO!!

So, for the record:

• You do NOT CARE about DOF because there are both advantages and disadvantages to both shallow and deep DOF. But overall I prefer deeper DOF because I can create shallow-DOF when needed, (selectively and controllably).

That sounds like you would care about DOF -- something of a contradiction.

• At f/1.8 I can use either a lower-ISO (for less noise if that is a factor).

So you believe that the lower ISO setting, *in and of itself*, is what results in a less noisy photo?

• I can use 2-stops faster shutter-speed, (which may often be very critical).

So you believe that you can't use the same exposure time at f/3.5 as you can at f/1.8?

• I BINGO that too-many here are obsessed w/ noise and (shallow) DOF. I support the ability to shoot at higher-SS @ lowest ISO, (for greater DR).

Does anyone (and I do mean anyone), not support the ability to shoot at lower ISO settings with shorter exposure times if it does not adversely affect the photo in ways that offset the advantages of doing so?

Does that mean you would not "DITTO!" what those saying otherwise are claiming:

• You can use any exposure time with any f-number you like.
• For a given system, scene, and exposure time, a higher f-number results in a deeper DOF, but a more noisy photo.
• In the case of f/1.8 on 1" and f/3.5 on APS-C, the same exposure time on both results in the former puts 1/3 of a stop more light on the sensor than the latter, which results in a very slightly less noisy photo (for a given sensor tech) along with a very slightly more shallow DOF.

'Cause you haven't said "DITTO!" to these comments anywhere in the thread.  So, I'd just like to confirm that you support the former statements as opposed to the latter with your "DITTO!" comment.

Thanks!