نوشته اصلی توسط
kholeno
از لحاظ دیستورشن 10-20 سیگما نسبت به 10-22 چه وضعیتی داره؟
از نظر دیستورشن سیگما 20-10 اصلن خوب نیست ولی روی هم رفته از سایر جهات و با توجه به عامل قیمت همه جا توصیه شده:
اینم مقایسش با 22-10 :
Compared to the ultrawide zooms from the camera makers, the little Sigma holds up surprisingly well, particularly considering the huge cost disparity between them. Canon's 10-22mm zoom tested very well, slightly edging out the Sigma 10-22mm in places, but getting beaten slightly in others. The Canon also does better in terms of maximum CA, but average CA is quite close to that of the Sigma. Likewise, the Canon lens does better with geometric distortion over most of its range. When it comes to shading though, it's closer to a tossup, with the Sigma better at the shortest focal lengths, and the Canon better at longer ones. When you factor in the Sigma's $450-500 price against the Canon's $700-800 price, the Sigma seems to be a clear winner.
و در پایان :
The bottom line seems to be that the Sigma 10-20mm f/4-5.6 EX DC HSM is a real bargain for an ultrawide zoom for sub-frame cameras. If you want to shoot really wide with your DSLR, this lens looks like a good way to go about it.
البته وضع 24-12 نیكور هم خیلی شبیه سیگماست به نحوی كه حتا تست كنندگان شك كرده اند كه ممكن است لنزی كه تست كرده اند ایراد داشته باشد ولی ظاهرن از لحاظ دیستورشن 22-10 كنن در این رده بی نظیره :