Headline - DSLRs have imprecise focusing due to their mirrors

Started Apr 5, 2014 | Discussions thread
D Cox Forum Pro • Posts: 21,524
Re: Get over it. DSLRs can focus accurately

Greg A A wrote:

DSLRs autofocus just fine for their intended purpose. Many DSLRs do an excellent job at auto focusing quickly, accurately and track well for sports and birding. The point of this thread is that DSLR AF works just fine. Other issues predominate the DSLR or mirrorless purchase decision.

It's delusional to believe that a DSLR can't focus accurately for most photographic tasks. There may be a difference for those photographers with unique applications. Those folks know their needs and most likely have their own expert reasons for their choice of gear.

I don't think anyone is saying an SLR can't focus accurately. Most can and do.

The point is that matching up the focussing mechanism with the sensor is another possible source of problems. And a few users do have front/back focus problems. This cannot happen where the focus mechanism is on the sensor itself.

(Another possible source of problems is spherical aberration in the lens. This could affect Phase Detection focussing in a few cases.)

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