Some help with my new 10-18mm IS STM please?

trulandphoto wrote:

bent christian wrote:

trulandphoto wrote:

bent christian wrote:

Looking at the two full-resolution photos, I can't find anything in focus. Absolutely nothing. The issue appears to be something other than than diffraction at f/11. Diffraction would be minimal at this aperture in a crop sensor.

Like I said, diffraction starts on this sensor at f/5.9 at normal focal lengths. super wide like this would be even larger aperture.]

Diffraction does not present itself like this in crop sensors at f/11.

Some areas would still show focus.

"focus" and softness are different things but can be confused. Diffraction results in softness. At 10mm and f/11 on a crop sensor you could almost focus anywhere and the entire shot is "in focus."

Even if I defocus my lens?

The fact that you don't see anything "in focus" indicates it's not a focus issue.

Ummm....no. It does not indicate that definitively at all. If the lens isn't focusing correctly or the user is in error, it would be entirely possible to capture nothing in focus.

No it wouldn't be. The range of focus for a crop at 10mm and f/11 is like from 18 inches to infinity. If you can manage to get nothing in focus in that range you're special indeed.

G'night.

Like most modern lenses this lens can have focus set beyond infinite.  This is how you get nothing in focus.  Happens all the time due to either errant manual focus or AF issues with lens/camera combo.