نوشته اصلی توسط
beigloo
اما درباره 250-55 ... تجربه عکاسی با آنرا دارم و برای نیاز من راضی کننده بود،ولی در مقایسه هایی که بین نمونه عکسها در نت داشتم به نظرم سطح آن کمی از 200-18 کنون پایینتر بود،شاید بهتر باشد آزمایشتان را یک بار دیگر در شرایط برابر تکرار کنید(و یا اگر من اشتباه میگم من را روشن کنید).
متشکرم
دیدن این لینک هم خالی از لطف نیست.
و نتیجه گیری:
*IMAGING QUALITY: The Canon 18-55 IS and 55-250 IS combo deliver BETTER OVERALL imaging quality, from CENTER TO EDGE, than any of the superzooms. Maybe that isn't a surprise though. But you do give up the main purpose of having a superzoom (i.e., not having to switch lenses in the field). But between the superzooms, I really like the overall imaging quality of THE TAMRON from what I saw with MY GIVEN samples (I THINK an earlier copy of the Sigma was a better unit than the one in this test). The Canon isn't far behind, and often matches the Tamron, but the Tamron really covers a massive range WITHOUT COMPROMISING output vis-a-vis the others. The Tamron also has the BEST BOKEH of the bunch; IMO much better than both the Canon and Sigma. In terms of FLARE, the Canon does the best job here. All of the superzooms have their ups and downs at certain focal lengths, though the Sigma probably is the worst offender here. Both the Canon and Tamron put out a bit BETTER CONTRAST reproduction than the Sigma, but it's not a night and day difference. The Sigma can deliver some VERY GOOD images as well (and is SHARPER at the WIDE END), but these two newcomers in the Canon and Tamron are a LITTLE BETTER OVERALL.