| Joined: | Fri Jul 25th, 2025 |
| Location: | Stroud Glos., United Kingdom |
| Posts: | 16 |
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I’ve rarely found any benefit in updating lens firmware ….unless it was for an obvious manufacturing ‘fault/bug’ discovered post release.
However…
With long telephoto Sigma lens it was (is?) a common practise to send NEW lenses back to Sigma UK for recalibration.
Apparently the lenses ex factory were set to an average calibration. Having your lens adjusted to IT’S optimum settings could make a significant improvement. It did with my 500mm back in the day….but that was the only Sigma lens I ever owned.
I have been trying to avoid this, but it may come to it. It's only a 70-200 APO F2.8 DG EX OS HSM -not necessarily in that order, but I have found the auto focussing strangely variable. The lens seems to work better in the PSAM modes, and manual focussing helps. I have to use my left eye these days!
Last edited on Sun Jul 27th, 2025 20:40 by