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06-21-2016, 08:15 PM   #1
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Sharpness inconsistency

Hello

I'm with 44mm/f1.9 Limited.

I am experiencing a strange inconsistency in sharpness of photos taken at identical exposure settings and shooting conditions. One image can be super sharp (the lens is truly superb), another right after - not so much.

I am not sure what to attribute this to - lens, camera or both. Is anyone experiencing anything similar?

Thanks

06-21-2016, 08:23 PM   #2
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Shake Reduction? If it's on while you're shooting on a tripod, it can introduce blur. SR can also take a brief moment to arm, so make sure the little hand icon is present in the viewfinder when hand-holding. A good way to ensure this is to always half-press first.

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06-21-2016, 08:41 PM   #3
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QuoteOriginally posted by bob_oi Quote
44mm/f1.9 Limited
?? Is that some secret new lens Pentax is testing. ?

Last edited by rawr; 06-21-2016 at 08:54 PM.
06-21-2016, 08:54 PM   #4
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The camera , is it a k5 sure

06-21-2016, 09:24 PM   #5
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QuoteOriginally posted by bob_oi Quote
Hello

I'm with 44mm/f1.9 Limited.

I am experiencing a strange inconsistency in sharpness of photos taken at identical exposure settings and shooting conditions. One image can be super sharp (the lens is truly superb), another right after - not so much.

I am not sure what to attribute this to - lens, camera or both. Is anyone experiencing anything similar?

Thanks
Pictures or it didn't happen
06-22-2016, 07:17 AM   #6
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QuoteOriginally posted by bob_oi Quote
Hello

I'm with 44mm/f1.9 Limited.

I am experiencing a strange inconsistency in sharpness of photos taken at identical exposure settings and shooting conditions. One image can be super sharp (the lens is truly superb), another right after - not so much.

I am not sure what to attribute this to - lens, camera or both. Is anyone experiencing anything similar?

Thanks
Hello,

I do not have that particular lens, but whenever I have had a similar problem (and, believe me, I have ), it was neither the camera nor the lens at fault.
06-22-2016, 09:39 AM   #7
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Sorry, it's K-1, I didn't mention, and the lens is 43mm of course.

QuoteOriginally posted by Adam Quote
Shake Reduction? If it's on while you're shooting on a tripod, it can introduce blur. SR can also take a brief moment to arm, so make sure the little hand icon is present in the viewfinder when hand-holding. A good way to ensure this is to always half-press first.
SR is off... But if it was on, is it operating when shooting stills?

---------- Post added 06-22-16 at 09:41 AM ----------

QuoteOriginally posted by Quartermaster James Quote
Hello,

I do not have that particular lens, but whenever I have had a similar problem (and, believe me, I have ), it was neither the camera nor the lens at fault.
At 1/500 what else can you blame?
06-22-2016, 10:13 AM   #8
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QuoteOriginally posted by bob_oi Quote
SR is off... But if it was on, is it operating when shooting stills?
Yes. You should turn SR off when the camera is tripod-mounted or in some instances if you're panning a shot. Otherwise, keep it on.

QuoteOriginally posted by bob_oi Quote
At 1/500 what else can you blame?
Camera shake?

06-22-2016, 10:28 AM   #9
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QuoteOriginally posted by bob_oi Quote
At 1/500 what else can you blame?
autofocusing problems.
06-22-2016, 11:36 AM   #10
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QuoteOriginally posted by osv Quote
autofocusing problems.
Which implies either a mechanical problem with the lens or a calibration problem with the body/lens combination. Another cause at this shutter speed could be AF technique, which I think is what Quartermaster James was implying. Pentax DSLRs, with their relatively large AF sensors need more help from the shooter than some other AF systems with smaller and more discreet AF sensors.

Photographers who take the time to understand how an AF system works and learn how to work around their particular camera's AF system's quirks can get much more consistent AF performance regardless of which system is being used.

Scott
06-22-2016, 12:21 PM   #11
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QuoteOriginally posted by bob_oi Quote
SR is off... But if it was on, is it operating when shooting stills?
That's what it's for. It stabilizes all your shots

Adam
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06-22-2016, 01:30 PM   #12
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QuoteOriginally posted by Adam Quote
That's what it's for. It stabilizes all your shots
Well maybe I should turn it on then Thanks
06-22-2016, 01:36 PM   #13
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QuoteOriginally posted by bob_oi Quote
Well maybe I should turn it on then Thanks
Sounds like we've gotten to the heart of what caused the issue to begin with. Great!

With SR on you can use crazy slow shutter speeds hand-held in low light, i.e. 1/6s. Try it out

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