Dilemme pour un équivalent 50mm

[Fredo_45]

Un test précis du sigma : Sigma AF 30mm f/1.4 EX HSM DC - Review / Test Report

Perso il pique d'enfer sur un 50D et est vraiment réactif ...

[calixte]

Un test précis du sigma : Sigma AF 30mm f/1.4 EX HSM DC - Review / Test Report

Perso il pique d'enfer sur un 50D et est vraiment réactif ...

c'est pas vraiment leur avis avec seulement 2 étoiles en qualité optique !!
Verdict

We all know that zoom lenses are compromises regarding speed and performance but we expect fix-focals to perform better than that. Sigma AF 30mm f/1.4 EX HSM DC may perform pretty good in absolute terms but for a fix-focal the lens disappoints a little. The center performance is exceptionally high but the borders are not all that impressive. The other image parameters such as distortions, vignetting and CAs are Okay but nothing to rave about. So at the end of the day the only differentiator is its ultra-large aperture - it's up to you whether this is good enough compared to classic 28mm or 35mm lenses.



Optical Quality:
2 étoiles !!


Mechanical Quality:
[IMG]file:///C:/DOCUME%7E1/ADMINI%7E1/LOCALS%7E1/Temp/msohtml1/01/clip_image002.gif[/IMG]
Price/Performance:
[IMG]file:///C:/DOCUME%7E1/ADMINI%7E1/LOCALS%7E1/Temp/msohtml1/01/clip_image003.gif[/IMG]

[calixte]

Un test précis du sigma : Sigma AF 30mm f/1.4 EX HSM DC - Review / Test Report

Perso il pique d'enfer sur un 50D et est vraiment réactif ...

c'est pas vraiment leur avis avec 2 étoiles en qualité optique
mais bon, cela ne doit pas trop se remarquer
cela dit, il est trop cher !!

Verdict

We all know that zoom lenses are compromises regarding speed and performance but we expect fix-focals to perform better than that. Sigma AF 30mm f/1.4 EX HSM DC may perform pretty good in absolute terms but for a fix-focal the lens disappoints a little. The center performance is exceptionally high but the borders are not all that impressive. The other image parameters such as distortions, vignetting and CAs are Okay but nothing to rave about. So at the end of the day the only differentiator is its ultra-large aperture - it's up to you whether this is good enough compared to classic 28mm or 35mm lenses.
Optical Quality:
[IMG]file:///C:/DOCUME%7E1/ADMINI%7E1/LOCALS%7E1/Temp/msohtml1/01/clip_image001.gif[/IMG]


Mechanical Quality:
[IMG]file:///C:/DOCUME%7E1/ADMINI%7E1/LOCALS%7E1/Temp/msohtml1/01/clip_image002.gif[/IMG]
Price/Performance:
[IMG]file:///C:/DOCUME%7E1/ADMINI%7E1/LOCALS%7E1/Temp/msohtml1/01/clip_image003.gif[/IMG]