puddleduck
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- Andy Drake
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OK, well the mfd shot looks very decent, less so with the infinity shot.
Assuming you are 15 meters away at infinity, you are getting a very quick "lock" from infinity to a test target at 15m. The lens doesn't have to move much, and may slightly over of undershoot, especially with fast geared lenses. Tamron usually has fast gearing, but I don't know this lens at all.. This is an AF "best effort". I assume your AF "focus beep" is happening very quickly with this test.
With the MFD test, you target is massively de-focused prior to activating AF, the lens takes longer to focus from massively de-focused to sharp focus. Its easier to go from out-of-focus to sharp focus for an AF module. II assume your AF "focus beep" is noticablely slower than the above with this test?
In a nutshell you don't really have a massive problem here, you could probably improve your bodies AF caliberation a tad (but this could put other lenses out). As a workaround you can always just go to MFD once in a while...
Assuming you are 15 meters away at infinity, you are getting a very quick "lock" from infinity to a test target at 15m. The lens doesn't have to move much, and may slightly over of undershoot, especially with fast geared lenses. Tamron usually has fast gearing, but I don't know this lens at all.. This is an AF "best effort". I assume your AF "focus beep" is happening very quickly with this test.
With the MFD test, you target is massively de-focused prior to activating AF, the lens takes longer to focus from massively de-focused to sharp focus. Its easier to go from out-of-focus to sharp focus for an AF module. II assume your AF "focus beep" is noticablely slower than the above with this test?
In a nutshell you don't really have a massive problem here, you could probably improve your bodies AF caliberation a tad (but this could put other lenses out). As a workaround you can always just go to MFD once in a while...
