Manual vs Av - same settings, different results

Hi Guys,

I'm an absolute beginner when it comes to digital cameras but I understand the fundamentals of photography. I prefer to use my G10 in full manual mode for greater control, but I've noticed that if I take a shot in Av mode then use the exact same ISO/Aperture/Shutter Speed in Manual, I sometimes get different results. Any suggestions as to why this might be? I would assume that if I replicate the settings chosen by the camera in Av mode I should get identical results in manual...

Hope this makes sense and grateful for any help.

Hmmm that sounds very strange. Any chance you can post a couple of sample pics?

The only thing that might affect your exposure is if the sun goes behind or comes out from a cloud in between you dialling in the settings.

It really depends on the 'different results' you are getting. Shift in color, exposure, or

In manual control, generally anything that will change needs to be done manually. In AV mode for example, the camera will be doing some processing and changing settings behind the scenes, and that processing could account for the differences you are seeing. Its hard to tell without knowing the differences you are seeing, and under what conditions. Ie, even a slight camera position change or difference in lighting can alter the final image.

I'll try and post some sample shots later, but I think I may have figured it out... Av mode is using automatic white balance.

Yoda is your Father wrote in post #10276326
I'll try and post some sample shots later, but I think I may have figured it out... Av mode is using automatic white balance.

If you want to use this more than once, you can set one of the custom (C1 & C2) settings to use Av with any specific/custom WB.

I don't have a G10 but on my G9 the white balance for P, Av, Tv, M remains as set. That is, whether in P, Av, Tv or M mode when white balance is set, that white balance setting is transferred to the other modes.

Keep in mind that differences in exposure also cause slght WB shifts, even in manual mode. If its severe, it may not be a WB shift, but if its subtle it is common for some cameras to shift WB slightly as the camera adjusts with variances in exposure.