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01-11-2022, 01:56 PM - 1 Like   #1

lens blur or motion blur

Using the lens that slid off the SUV onto the concrete, I have tried to determine if my issues lately are operator error, or lens error or both.
Both images locked on focus with a confirmation.
I had been considering the larger 150/450 lens as a replacement, and several folks in my age group said it has been for them and might be for me to much to hold still adequately.
The blurry image was shot at 1/2000ths and the sharper one at 1/2500ths. Not a big difference considering the difference in IQ.

I think, I am seeing motion blur on crop 1, whereas crop 2 seems good and more like what the lens usually delivers.

Both images shot on a very old K5IIs spot/single point focus.These were all hand held, but I get similar misses on the tripod as well.

100% crops and unedited

Your opinion, motion blur, lens blur or both in Crop 1


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01-11-2022, 02:06 PM - 1 Like   #2
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I think that the blur in the top pic is missed focus (front focus, probably).
Although the catch light in the eye looks like it's blurred (I think it's reflected light), you do not see the same blur on the beak.
01-11-2022, 02:08 PM   #3
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It looks to me that the bird moved and got itself out of focus in shot 1... but you would have noticed that. I'm certain though that it's not motion blur, not at 1/2000s. To me it looks clearly out of focus (front focused).
Did you use center point focus in both shots?
01-11-2022, 02:22 PM   #4
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The first shot is definitely out of focus, the wing is closest to being in focus. Depending on your distance from the Osprey and how much it is cropped, it's hard to say on shot two but it doesn't look real sharp. There should not be much chance of motion blur on a sitting bird at those speeds. Could it be that you need to do a focus calibration?

01-11-2022, 02:34 PM   #5

QuoteOriginally posted by FozzFoster Quote
I think that the blur in the top pic is missed focus (front focus, probably).
Although the catch light in the eye looks like it's blurred (I think it's reflected light), you do not see the same blur on the beak.
yup single point focus on both, the lens seems to favour focusing from the long end towards the target and not from the short end, and its really quite random.
I have to think the lens adjustment systems inside suffered from the fall.
some of these issues may stem from the K5iis as it has never had reliable focus from day one. It will often fail focus and focus itself down to 4.6 ft and lock there unless you move the focus manually.
It has done this on the K5 forever but never the K3, which unfortunately is non functional
01-11-2022, 03:11 PM   #6
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the first one defiantly out of focus
01-11-2022, 04:18 PM   #7
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QuoteOriginally posted by nixxo2002 Quote
the first one defiantly out of focus
I have to agree. I opened the first in Topaz Sharpen AI and it immediately used the "Out of Focus" sharpen model as opposed to "Motion Blur" or just "Too Soft".

01-11-2022, 05:03 PM   #8

Okay I appreciate your opinions. Wanted to make sure cuz maybe my eyes were crossed All right. Thank you. I now have the relatively virgin KP in my hands and will be testing that same lens on that body
01-12-2022, 01:46 AM   #9
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Choose a target and focus confirm on it and note the distance on the scale. Refocus using live view, focus peaking and image magnification and see if you get the same distance..

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