Manual Focus

I have a Canon S2 IS and I am attempting to use the manual focus to take a picture of a white flower with green leaves. According to the manual, you have to hold in the MF button and use the up and down arrows to focus, and then press the set button and then shoot. I am having difficulty discerning much change in focus when I use the arrows. I am 65 and fast approaching cataract surgery. Is it me? Has anyone used manual focus with an improved outcome over AF? Thanks, Nelson.

My G3 couldn't auto-focus through the fence so went manual which apparently works like yours...the trick was shooting Av to ensure I had a minimum F5.6 for enough DoF and of course had to have good luck judging the distance...good luck....

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Yes, I used manual focus on my G2, exactly same procedure as you did with your S2. But I tried to move the focus window to the high contrast area of the subject while I move the up and down arrows to focus. No problem so far. I'm also 65 and had cataract surgery on both of my eyes.
I have to move the focus window to the Canon Logo to focus for this picture, otherwise it's all black, nothing really change when I move the arrows either way.

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