Les témoignages sont assez nombreux sur
www.fredmiranda.com, extraits des commentaires "défauts":
- dust leaks in when you zoom a lot
- The push-pull zoom; Can be a dust magnet;.
- Dust issues
- There is no myth about "dust sucking." I take immaculate care of my camera and my image sensor is dirty after every outing with this lens, as is the mirror. A week's worth of work with my 24-70L produces no such problems with dust.
- Better off attaching a vacuum cleaner to you camera and putting the other end in some dirt
- Worried about dust that may be blown in to ccd by push pull
- at 300-400 it is not a hand held lens question the push/pull lots of air movement and not even the "L" construction keeps the dust out if you're use the zoom in dusty enviroments
- push-pull "dust sucker" zoom
- Push pull zoom is awkward, may suck dust, and can sometimes adjust your focal length without you realizing it
- Push-pull akward, sucks dust
- ...
J'ai failli acheter cet objectif il y a plusieurs mois et c'est ce que j'ai lu à ce sujet qui m'a refroidi...