RuleOfThirds
Well-Known Member
- Joined
- Nov 16, 2023
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- 1,121
It might have to do with s5ii misfocussing.
I know that that it is not plain. But at that distance with F10 the DoF should have been enough I guess. Not like this.The left part of the picture is further away than the right part of the picture. Personally I always use AF-S centre point only and I would focus on the left part of the picture, lock focus and frame it as you did. In that case everything should be sharp.
In theory you are 100% right but in real life situations it does not work out. I had a similar case 2 years ago and I have never experienced it again with my way of focussing. In my experience anything beyond the point you focus on will be less sharp. Most lenses behave like this, but with some lenses it is less clear than with the 28-200mm.A Quick AI calculation claims that 130mm F10 in full frame from 56m should have infinity DoF.
The greater distance also means more atmospheric effects, but it doesn’t seem like a great enough difference in distance (to the right side) for haze to be a good explanation. It certainly does not look like heat rising off the rocks.The left part of the picture is further away than the right part of the picture. Personally I always use AF-S centre point only and I would focus on the left part of the picture, lock focus and frame it as you did. In that case everything should be sharp.
Yes, it does not look like haze anyway. More like mis-focus or a de-centered lens, which yours clearly is not.that last mountain shot is also a km away. And a hazy day in the mountains
There is something weird going on with this lens on infinity focus when the subject is very far away (1km?), I think that this is where @pdk42 got his troubles with this lens too. It might have to do with s5ii misfocussing.
full
View attachment 18079
100% crop right, focus point on the citadelView attachment 18081
100% crop left of the image (horendous)
View attachment 18080
I do think soI have had problems with sharpness using AFC when focusing very far, I frequently change to AFS. Maybe it is this?
Right:
Left
View attachment 18084
The citadel example is not the only one, I have more. And what they have in common is >100mm and hazy, and far away infinity subject. What is where I tend to use the a tele lens.
It is not only in high contrast scenes, but also in low contrast.I have gone through my pictures taken with the 28-200mm and I have all come across a few "problem" pictures. When you have a look at the left side bottom corner of the picture above, you see the problem: the words "urant grill", just as the bricks, are not razor sharp but soft.
At first I thought it was a focus problem. So I tested my lens (on a Leica SL2-S) by taking pictures of car number plates. By looking at the registration number but especially at the very small printed words below (name of garage, etc.) I saw that some pictures taken a 1/100 sec. were not razor sharp. So the IBIS is not good enough for this lens. BTW I had the same problem with my former Lumix S5D with dial IS.
What struck me was that all the "unsharp" (perhaps 1% of all my pictures taken with this lens) had one thing in common: lots of sunlight and high contrast. When for example you take a picture of a black shed with white window frames, the white frames will not be sharp, the same as you will see in the left hand bottom corner of the picture above.
The Lumix 28-200mm is a slow lens and I tested at 200mm. To get a higher shutter speed, you can put up ISO of choose a wider aperture. Choosing a wider aperture is not possible with this lens, so I ordered a Samyang 60-180mm which I received yesterday. This morning I took pictures at 60, 120 and 180mm and compared them to the pictures taken with the Lumix last week. The Lumix is softer on the edges than the Samyang lens, especially at 120 and 180mm.
This afternoon I made my cycling tour and took pictures with my new Samyang lens. Some were practically identical to those taken with the Lumix 28-200mm some time ago. When pixelpeeping at 100% they were sharp, unlike those taken with the Lumix lens.
My conclusion is that there may be a problem with IS, but the main problem is that the lens is in trouble in high contrast, sunlit situations between 100 and 200mm.
The gap in lightness between the yellow hotdog van and the dark background is too much for this lens to bridge. The result is that things become soft in a strange way resembling camera shake. Superzooms are always a compromise. The 28-200mm is not a bad lens at all but it certainly has its weak points. The pictures I have taken with this lens are for 99% OK, but I use the range 28-100mm most of the time. I did not want to buy a telezoom because I miss the WA side. But the slow aperture between 100 and 200mm made me think again. I now have the Schneider Kreuznach Samyang 60-180mm/f2.8 for it.100% left bottom, weird unsharpness