Beginner's question on A vs. M :)

Started 6 months ago | Discussions thread
MRM4350
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Re: Beginner's question on A vs. M :)
In reply to wireless, 6 months ago

wireless wrote:

I notice many people use A-priority. You can usually tell because you'll see EC adjusted or by the way they talk about the settings, e.g., "resulted in a shutter speed of xxx."

I switch to AP in a lot of dynamic situations where there isn't time to go full manual.

The thing is you still need to adjust EC on the fly which to me is close to the same thing as adjusting aperture or shutter speed in M. I don't know what the advantage is. Maybe a tad easier.

One way to have the best of both worlds perhaps is to use Auto ISO in manual.

This changes Manual mode into an auto exposure mode which will require using the EC control as in 'A' or 'S' modes so actually does nothing for you. The point of 'M' mode is that you control EC by adjusting aperture and/or shutter speed to over/under expose if the need arises, and you can't if the camera continues to center the meter.

My question is does a doubling or halving of ISO equal the same thing as a stop or a doubling or halving of SS? In other words will Auto ISO cover the same range as, say, +- 2 stops of EC?

I would rather know/set my A and SS and let ISO take care of light variations.

best, David

p.s., how does Auto ISO interact with AP's adjustment of SS?

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