Bought a faulty Pentax-DA 11-18?

Started 3 months ago | Questions thread
OP GoodD New Member • Posts: 7
Re: Bought a faulty Pentax-DA 11-18?

Carlos U wrote:

Besides the changes in light levels, if you look carefully, the foreground is softer in the lighter pictures, or a bit sharper in the darker ones (look in to the granite block on the right and the grill on the left, specially between photos #4 and #5). I asume all pictures where focused at the same distance.

This could be a sign of a sticky aperture. According to EXIF all pictures where taken at f5.6. Looks like on the three that are brighter the aperture was wider.

Correct -> focus point wasn't changed.

I also suspect that even though the setting was f5.6, some of the shots were taken wide-open.

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