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trevorbray
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Yep. More testing required. Definitely against other lenses. Try on a tripod. Differing focal lengths.
Random focus issues do happen. AF-S and AF-C. Set the camera to release on focus.
Random focus issues do happen. AF-S and AF-C. Set the camera to release on focus.
Lost_Manc
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I have experienced this in the past but not with the 16-55. In that instance it was with the 18-55.
In that instance focus box was green and ‘locked‘ to subjects head. Actual shot the ficus was just in front and below.
Did you focus box turn green?
Those settings seem to indicate you had a focus warning unless I am reading them wrong.
Were you too close so the eye wasn’t able to be in focus and the green toy is where focus fell.
IIRC close focus is a bit poor on the 16-55. Think the 18-55 can focus closer.
I personally prefer my releases to be on focus vs release but that’s just personal and plenty have AFC on release.
Definitely continue to test. The 16-55 is a lovely lens imo.
In that instance focus box was green and ‘locked‘ to subjects head. Actual shot the ficus was just in front and below.
Did you focus box turn green?
Those settings seem to indicate you had a focus warning unless I am reading them wrong.
Were you too close so the eye wasn’t able to be in focus and the green toy is where focus fell.
IIRC close focus is a bit poor on the 16-55. Think the 18-55 can focus closer.
I personally prefer my releases to be on focus vs release but that’s just personal and plenty have AFC on release.
Definitely continue to test. The 16-55 is a lovely lens imo.
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Well, I'm no expert, but on my Fuji if it can't focus, for whatever reason, you get the red box. You could try standing back a little, better light, or change your settings. I'd do that before sending it back.
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Every camera I've ever had has displayed missed focus at some time but there are often or even usually some common causes which can make problems more likely such as...
Being at or near minimum focus distance.
Some issue with light and/or contrast making something other than what I'd hope to be the point of focus more attractive.
Using too big or too small a focus box or using a mode which lets the camera choose the point of focus.
Apart from those things it could be some sort of fault.
With mirrorless and the focus being taken off the sensor you'd think these things wouldn't happen but in reality they do and mirrorless has "only" made focus errors less likely rather than completely eliminating them.
I hope you can get this either sorted or at a point at which it's less likely to happen OP.
Being at or near minimum focus distance.
Some issue with light and/or contrast making something other than what I'd hope to be the point of focus more attractive.
Using too big or too small a focus box or using a mode which lets the camera choose the point of focus.
Apart from those things it could be some sort of fault.
With mirrorless and the focus being taken off the sensor you'd think these things wouldn't happen but in reality they do and mirrorless has "only" made focus errors less likely rather than completely eliminating them.
I hope you can get this either sorted or at a point at which it's less likely to happen OP.
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OP
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Hello
So after an afternoon of testing I think I worked out whats going on and I will call it User Expectation rather than user error
Its very easy to reproduce. Basically when I am moving/recomposing, the box and focus green light is not changing, however the focus plane moves and so its takes a second or two for the lens to adjust. This slowness to change will also be amplified in low light I would assume
In the above example the points between what was in focus and what it thought was very small along the x axis so the dogs head moved and I did not give it time to catch up thinking green light always means ready!
As I'm making such small movements the camera does not have time to realise its no longer in focus so stays green and then Ive already taken the shot.
Will keep on testing but Occams razor tells me the simplest solution is often the correct one
Tested also the 35 f2 and could re produce however the focus was much snappier between movements
Thanks all!
So after an afternoon of testing I think I worked out whats going on and I will call it User Expectation rather than user error
Its very easy to reproduce. Basically when I am moving/recomposing, the box and focus green light is not changing, however the focus plane moves and so its takes a second or two for the lens to adjust. This slowness to change will also be amplified in low light I would assume
In the above example the points between what was in focus and what it thought was very small along the x axis so the dogs head moved and I did not give it time to catch up thinking green light always means ready!
As I'm making such small movements the camera does not have time to realise its no longer in focus so stays green and then Ive already taken the shot.
Will keep on testing but Occams razor tells me the simplest solution is often the correct one
Tested also the 35 f2 and could re produce however the focus was much snappier between movements
Thanks all!
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sk66
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You also have to be careful with what the exif actually says... some cameras only report the focus point selected (location), some will also report if the camera thought focus point was in-focus or not, and some will additionally report if a different focus point was in-focus/used (AF tracking).
E.g. reading the exif for focus point is about useless on late model Nikons, because they only report the selected focus point (location/area) for most AF modes.
E.g. reading the exif for focus point is about useless on late model Nikons, because they only report the selected focus point (location/area) for most AF modes.