Originally posted by konraDarnok You own this lens?
If not, I've been using someone else's the last 5 months.
Originally posted by konraDarnok This is exactly what I do to get tack sharp pictures at wide angle focal lengths.
Hmmh, perhaps the pictures could be even better focused?
I've tried this a while ago and clearly noticed that focus had to be adjusted after changing the focal length.
Just to make sure, I just did a test.
- zoom in to 250, AF
- set to MF, zoom out to 18mm, take a picture
- leave at 18mm, AF, take another picture
I did this with a tripod and 2sec delay.
Clearly, AF readjusts at the wide setting (or at the long setting, depending which way round you do it). The second image was always a bit sharper.
The only time it wasn't sharper was when I dialed in an incorrect AF focus adjustment.
EDIT: I just redid the test for different apertures and made an
interesting discovery.