Using non-Global Vision (preferred) Sigma lenses - on SD Quattro Mirrorless cameras.

Started 2 months ago | Discussions thread
OP ELSELS Senior Member • Posts: 1,879
Re: Using non-Global Vision (preferred) Sigma lenses - on SD Quattro Mirrorless cameras.

Iconoscope wrote:

Yeah, mine are older lenses because I can't afford those pricey GV lenses! About half of the shots I take are slightly out of focus using DC and DG lenses.

The thing (one of them anyways) -  - that bugs me - is the lens mounted on the SD Quattro - using AF - throughout the different AF focus point sizes - ALL with "BEEP" - turn the AF box "Green" as to confirm in focus.

Take the shot - then to find it was NOT in focus.

Hence - how can the camera's AF system be "getting things wrong"?

I think it might be then, as I am trying to understand and learn about this issue where the lens focusing WIDE open aperture - IN FOCUS - then closes the aperture - to the aperture setting - this might be causing the issues?

Guess not any "fix" or viable work around solutions?

Ed

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