Discussione: Help obiettivi 300d
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Old 23-02-2004, 08:04   #28
enrico
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Iscritto dal: Jul 1999
Cittā: Venezia
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domanda

Ma scusa Terry, se hai la 300D hai giā un 18-55. non ti conviene prendere un 75-300 come ho intenzione di fare anch'io??
Che senso ha comprare un 28-XXX che si sovrappone all'ottica che hai giā??

EF 75-300:
Focal Length 75-300; Equivalent focal [120-480]; Aperture Range 4-5.6; USM Choice (no FTM); Filter Size 58mm; Price $140-$390; Lens Mount Metal; Distance scale No

Commento:
EF 75-300/4-5.6
There are three of these, a non-USM version, a USM version and a USM version with IS (Image stabilization). Though the lens has a metal lens mount, it has no distance scale and the USM motor isn't a ring type so it isn't silent and you don't get full time manual focus. The USM version is probably marginally quieter and marginally faster focusing then the non-USM version. Optically all three lenses are very similar. The two non-IS lenses have identical optics but the IS lens has additional lenses as part of the IS mechanism. All three lenses are very sharp at the short end but start to become a little soft at the long end. They're still not bad - but not as good as a 300/4L lens. The IS version is one of my favorite lenses. You can shoot hand held at 300mm at speeds down to 1/125, maybe 1/90 and still get images which are sharp. At 300mm you have an "effective" 480mm lens compared to the view with a 35mm full frame camera which is very useful for sports and wildlife


Mha!?

enrico

Ultima modifica di enrico : 23-02-2004 alle 08:12.
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