01-03-2011, 08:31 PM
That's allright, Miro.
We haven't really tried to measure veiling glare with Imatest. It would not be too difficult to build the test chart, however the question is: how field-relevant is the measured value really?
Out in the field, glare (as measured in Imatest) and flare seem two different issues to me. At least the flare issues I described in the 14-24 review wouldn't have been detected with the Imatest veiling glare measurement.
It probably makes more sense to stick to a slightly more pragmatic approach. Every lens will show some flare or glare in backlight situations. It's simply a given that we won't mention in the reviews, unless we test a lens that happens to be very prone or very resistant to flare. In this case we mention the behaviour in the review, combined with one or two illustrating test shots (see 14-24, 200VR and 24/1.4 FX reviews for examples).
Of course, this will only happen with lenses that we actually had the chance to use in the field in sunny conditions. Unfortunately, this is not always possible.
-- Markus
We haven't really tried to measure veiling glare with Imatest. It would not be too difficult to build the test chart, however the question is: how field-relevant is the measured value really?
Out in the field, glare (as measured in Imatest) and flare seem two different issues to me. At least the flare issues I described in the 14-24 review wouldn't have been detected with the Imatest veiling glare measurement.
It probably makes more sense to stick to a slightly more pragmatic approach. Every lens will show some flare or glare in backlight situations. It's simply a given that we won't mention in the reviews, unless we test a lens that happens to be very prone or very resistant to flare. In this case we mention the behaviour in the review, combined with one or two illustrating test shots (see 14-24, 200VR and 24/1.4 FX reviews for examples).
Of course, this will only happen with lenses that we actually had the chance to use in the field in sunny conditions. Unfortunately, this is not always possible.
-- Markus
Editor
opticallimits.com
opticallimits.com