11-03-2015, 04:09 PM
Quote:Is the filed curvature worse at the very close testing distance than it is in practice (~infinity)?I am curious what would be Klaus's answer to that. Basically many lenses show a curved image field at close focusing distance, even "bold" ones like the 12-60 at 60 mm and MFD.
It would be also interesting to know how long is the object distance at 7 mm in the test.
Regarding field curvature: my ex-Tamron 17-50 non-VC had it, the workaround was either hyperfocal distance or focus at2-3 m or so, when doing landscape.
By the way I also suspect that the FT version has a slight bit of it too, however I never digged into that. Other than that it is a bit disappointing the the best ÂµFT-glass is sort of underdesigned here; I suppose that is the price to pay for the moderate dimensions.