p.7 #2 · 24-105mm FOCUS SHIFT survey - FINAL RESULTS
col4bin wrote:
Someone over at DP review posted that the last letter of the serial number on 2 lenses they tested were different. A good lens ended in A while a faulty lens ended in C. Both lenses were from the 181xxxx batch. This may be a clue.
Interesting.
It would be great if those who reported bad lenses could have a look at their lens box and report back with the serial number suffix.
p.7 #8 · 24-105mm FOCUS SHIFT survey - FINAL RESULTS
Parariss wrote:
Are these lenses produced at more than one factory?
I’m thinking it’s more production lines than anything else. They may have 12 lines per say that go from start to finish and maybe one line got bad parts or something or was taught the wrong process on build.
p.7 #9 · 24-105mm FOCUS SHIFT survey - FINAL RESULTS
So far, no trend or clue in the serial number suffixes. Only two are the same (A) and one came from a bad lens and one from a good one. Not enough data.
p.7 #14 · 24-105mm FOCUS SHIFT survey - FINAL RESULTS
I have gone crazy testing my lens. I have shot several hundred test photos and happy that the issue is not present. I will be curious to see how Sony handles this. It's a great lens...not too big and not too small, light and great general purpose range.
p.7 #15 · 24-105mm FOCUS SHIFT survey - FINAL RESULTS
MikeEvangelist wrote:
I've just heard (from a well-placed source) that Sony is definitely aware of this situation and positive news will come next week.
If they are aware of a problem and they haven't stopped sales, that seems to indicate they don't think there is a real problem with the lens itself.That or some lenses do have a problem and Sony is putting the burden on the customer to find the problem and get it fixed under warranty. Or maybe they're just going to throw another firmware revision at it; where the lens focuses at the taking a picture regardless of the settings.
p.7 #16 · 24-105mm FOCUS SHIFT survey - FINAL RESULTS
It seems to me that it is more an annoyance rather than a real issue, at least that's the way I look at it and I understand if your opinion is different. Of course, Sony has to address this since it is out in the open and folks are testing their lens like heck . But seriously, this is not the typical work flow to focus first and then stop down to what aperture you want to use, at least that's not my work flow. Typically, iIf you want to shoot at f/8, you set the aperture first, you compose, focus (using AF-S or AF-C) and you take your shot.
p.7 #17 · 24-105mm FOCUS SHIFT survey - FINAL RESULTS
pdmphoto wrote:
If they are aware of a problem and they haven't stopped sales, that seems to indicate they don't think there is a real problem with the lens itself.That or some lenses do have a problem and Sony is putting the burden on the customer to find the problem and get it fixed under warranty. Or maybe they're just going to throw another firmware revision at it; where the lens focuses at the taking a picture regardless of the settings.
I think your assuming too much here . Lets wait to hear what the REAL solution is before we start throwing Sony under the Nuclear Bomb.
p.7 #18 · 24-105mm FOCUS SHIFT survey - FINAL RESULTS
AGeoJO wrote:
It seems to me that it is more an annoyance rather than a real issue, at least that's the way I look at it and I understand if your opinion is different. Of course, Sony has to address this since it is out in the open and folks are testing their lens like heck . But seriously, this is not the typical work flow to focus first and then stop down to what aperture you want to use, at least that's not my work flow. Typically, iIf you want to shoot at f/8, you set the aperture first, you compose, focus (using AF-S or AF-C) and you take your shot. ...Show more →
The A7r II and III both focus the lens wide-open in AF-S mode, irrespective of the aperture set and Live View Setting enable. This causes OOF shots when shooting at any aperture smaller than f/4 at 70mm - 105mm. So the problem was discovered using a very typical shooting workflow.
p.7 #19 · 24-105mm FOCUS SHIFT survey - FINAL RESULTS
AGeoJO wrote:
It seems to me that it is more an annoyance rather than a real issue, at least that's the way I look at it and I understand if your opinion is different. Of course, Sony has to address this since it is out in the open and folks are testing their lens like heck . But seriously, this is not the typical work flow to focus first and then stop down to what aperture you want to use, at least that's not my work flow. Typically, iIf you want to shoot at f/8, you set the aperture first, you compose, focus (using AF-S or AF-C) and you take your shot. ...Show more →
No workaround for AF-S, at apertures below f/4 with faulty lenses, you will get OOF images, that is the big problem.
AF-C is fine, MF has a workaround. No workaround for AF-S.
What happens is AF-S acquires focus at f/4, regardless of the working aperture you've selected or live preview settings.
You can dial in your aperture first - as in your example, f8 - but when you acquire focus, the lens momentarily opens up to f/4, acquires focus, then stops back down to f8. Result = out of focus images. On my lens, 100% of the time if not at f/4 and in AF-S, live preview on or live preview off.
p.7 #20 · 24-105mm FOCUS SHIFT survey - FINAL RESULTS
Thank you for reminding me, both of you! Yes, my mindset is based on AF-C .
Ironically, just a few months ago some folks complained about that particular feature for studio shooting with studio strobes, I meant the feature that lets the camera focus to wide open when acquiring focus but actually taking picture at the set aperture.
. But seriously, this is not the typical work flow to focus first and then stop down to what aperture you want to use, at least that's not my work flow. Typically, iIf you want to shoot at f/8, you set the aperture first, you compose, focus (using AF-S or AF-C) and you take your shot.