More frequently than other lenses, zooms do display product variability and you may have to test several before getting a perfect sample. This results because of their complex optical design. Remember that such lenses also would be more susceptible to knocks and blows than are primes, so treat them with real care.
They are prone to show adverse effects from flare (stray light spilling over the glass surfaces to create a low-contrast veiling of the image) and/or ghosting (those nasty, often brightly coloured, spots showing reflections of the aperture opening).
Despite today's highly sophisticated lens designs and recent advances in lens coating technology, such distracting phenomena are virtually avoidable under certain shooting situations, for example, when you shoot into the sun or experience strongly back-lit subjects.
Full Evaluations Here
No comments:
Post a Comment