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G15 auto function


guidoa 13 1.4k United Kingdom
16 Jul 2013 1:17PM
I have just bought a Canon G15. I have tried it in the auto mode and whilst he results are very good, in good lighting situations, nerly photos ar taken at f2.8 or lower even at wider end and high speed .This is even of landscape scenes. I have ISO set to auto. Presumably being aito mode it can not be overidden, so I was wondering why that is. Thanks

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sherlob Plus
9 2.6k 126 United Kingdom
16 Jul 2013 2:49PM
I don't know, but in auto mode do you have an option to select a specific type of scene? I wonder if its defaulted to portrait?
cuffit Plus
8 222 2 England
16 Jul 2013 3:30PM
Guidoa

My understanding of the G15 and if I understand your question correctly, all Canon cameras (I think) with Smart Auto place the camera in full control. Turning the Mode Dial to 'P' and beyond gives you the ability to change the ISO and everything else besides; there are loads of ways to change ISO but the easiest is the Function Dial to the right of Display panel. I see you have had the 350D and now the 450D so it is much the same.

I think the Auto function is to allow those new to cameras to fire off shots with a greater chance of success and before knowledge of the other functions is explored. Having said that and as you have found out, the Auto mode produces good results as long as the result is what you want, if you see what I mean. Also, many experienced photographers leave their cameras on and in Auto or P Mode so that should a 'grab shot' need to be taken immediately and without thought, there is a good chance you might get something. Each Mode has its merits.

I hope this answers your question. I have a G15 and will try to answer further if you want.

Chris
Paul Morgan Plus
14 16.9k 6 England
16 Jul 2013 4:12PM

Quote: Presumably being aito mode it can not be overidden


Did you mean i auto ?
guidoa 13 1.4k United Kingdom
16 Jul 2013 7:11PM
Paul, I meant auto But typing on the Ipad is a pain the butt!

Sherlob, there is no such option.

Cuffit, you re right, putting the camera in auto puts it in total control. I was just curious why all photos were being taken @ f2, or 2.2 @ speeds of 1/1000 in very bright sunny weather.
cuffit Plus
8 222 2 England
16 Jul 2013 8:47PM
I think it might be to give the exposure the highest chance of success in a point-and-shoot in most circumstances - low ISO, highest shutter speed and wide aperture will probably yield a well-exposed and sharp photo. I seem to remember that a rule of thumb (in the days when the battery only operated the camera's light meter!!) which put the settings on a bright sunny day in UK as ISO 100, F8 at 1/250 for a good exposure as a place to start; so the Canon has traded a wider aperture for the higher shutter speed.


Chris.
ChrisV 8 1.1k 26 United Kingdom
17 Jul 2013 3:28PM
Even at those wide apertures because it's a small sensor camera unless you have very close foreground detail you're probably going to get a fairly extensive depth of field anyway.

Clever as cameras are these days I don't think there are any electronics that can tell the camera 'hello, this is a rock in a shallow pool a metre away, I'll bet guidoa wants those cliffs in focus too...' so as others have said it's giving you the best combination to get a well exposed, sharp shot even with fairly fast moving subjects. If there's a scene mode set it's shifting those parameters down to a different subset - landscape mode would probably give more priority to a smaller aperture.

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