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at high f-numbers it's going to be harder to get things in focus
This does not make any sense.
Your 450D will stop down the aperture just before the picture is taken, so it doesn't matter if you (or the camera) sets f1.8 or f22
(we're talking about autofocus lenses, right? The finder does not get darker, as you change aperture, right?)
salad-
Right, I see, didn't know that. The view in the finder stays the same brightness, yes.
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Your 450D will stop down the aperture just before the picture is taken, so it doesn't matter if you (or the camera) sets f1.8 or f22
I discovered this when trying to take photographs through a chain link fence in bright sunshine. Looked great through the viewfinder, no fence evident- operate shutter, fence!
A moment of confusion followed.
frankenbike
Dammit
I just bought the f/1.8 50mm Canon lens which I'd hope would be working okay. Obviously at high f-numbers it's going to be harder to get things in focus but still.
Edit: realised that wasn't very clear. Yes, happens on several lenses, including my new-ish one ^