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Canon 450D autofocus problems

Started Apr 29, 2016 | Questions thread
junk1 Senior Member • Posts: 1,788
Re: Canon 450D autofocus problems

My understanding is that many SLRs have the most dynamic range at ISO 200 (because ISO 100 is shot at ISO 200 electronically, but modified to appear to be ISO 100 via software, similar to how ISO 320; etc are created).  I can't recall if that's the case with the Rebel XSi/450d. I see some mentions of it online but not on a major site.

Also, years ago I decided 2x the shutter speed improves the images more than the additional noise, if any, at ISO 200 versus ISO 100.

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