Focus tuning.


derek897

Link Posted 15/06/2014 - 12:35
After getting a k5iis and a da*60-250 i went off yesterday to try them out. now my panning techniques are not the best but even on static shots i was unimpressed with the sharpness or lack of it. so this morning decided to fine tune my lenses using this

http://photographylife.com/how-to-quickly-test-your-dslr-for-autofocus-issues

Result was Da* 60-250 needed +5. samsung dxenon 100mm Macro was fine. Da* 55mm f1.4 needed +10. and Pentax F 28mm f2.8 needed +7.

I feel surprised that out of 4 lenses the only one that was spot on was not a Pentax, ( even if it is just a re badged Dfa 100mm) Is this unusual ???
I know what i like, If not always why.

johnriley

Link Posted 15/06/2014 - 12:43
Of course the one you found OK was a Pentax, being made by them in the same factories.

However, some people find a need to adjust lots of lenses. Some, like myself, have never found such a need. When I do, I'll run the appropriate tests and make adjustments. With a zoom it will be a compromise as it may differ at different focal lengths and distance settings.
Best regards, John

derek897

Link Posted 15/06/2014 - 17:45
Here are 3 after focus tuning and one without. Recropped and exposure adjusted, no sharpening. The last one was pre tuning
The difference is staggering.












I know what i like, If not always why.

derek897

Link Posted 15/06/2014 - 17:46
Sorry all were shot handheld.
I know what i like, If not always why.

johnriley

Link Posted 15/06/2014 - 17:47
I particularly like the third shot, a really good composition.

If your pictures are now sharp, and they seem to be, then the job is done.
Best regards, John

derek897

Link Posted 15/06/2014 - 17:52
Thanks John.

Derek
I know what i like, If not always why.
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