On Mon, Feb 6, 2012, at 11:38 PM, C.H.Ling wrote:
> All DSLR camera manufacturers have problem to ensure accurate focus with
> different lenses, in the film age no one notice about it but the problem
> can't hide when pixel count increases in digital age. That's why we have
> focus calibration on the latest DSLRs. Even so I don't think it works in
> all
> condition, the Tamron 70-300 I had was working fine with my 5D II at day
> time but focus shift with tungsten at the short end.
That is very weird. Photons are photons, aren't they?
> I think mirrorless camera is the way to go, the focus of my E-PL1 is
> extremely accurate even under very poor light.
Can you rule out all other factors affecting IQ with your DSLRs in low
light (camera shake, high ISO, etc.)?
Joel W.
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