Reviews and Problems with Sigma 18-50mm F2.8 EX DC MACRO /HSM
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Value for money 9
Picture quality 9
Sigma 18-50mm f/2.8 EX DC Macro Review
What Digital Camera
23 January 2009
Summary: Sigma’s almost identical 17-70mm f/2.8-4.5 and 18-50mm f/2.8 siblings both look and feel like serious lenses. Neither one is truly a macro lens, despite that specification being in both names, but in other respects the prices are similar enough to allow a buying choice to be made simply by assessing...
Conclusion: This lens is small for an f/2.8 model and although it suffers slightly at the wide-open aperture the focusing ability throughout the focal range warrants the aperture. From f/4 onwards it is a cracking lens that is light enough to have fitted to the camera permanently as a walk-round lens.
Pros: Quick, accurate autofocus, Small and light for an f/2.8 lens, Sharpest lens tested to date, Useful protective pouch
Cons: CA wide open, Slight distortions at either end (Minor point)
Summary: If you’re looking for something completely different, Sigma provides a very viable option. For less than the price of the camera brands lenses, the 18-50mm features macro capability, making it unique in this round-up.
Pros: Macro capability, Special Low Dispersion/Low Dispersion glass
Sigma AF 18-50mm f/2.8 EX DC macro - Review / Lab Test Report
26 May 2008
Conclusion: Generally the Sigma AF 18-50mm f/2.8 EX DC macro delivered a solid performance but without being any better than the competition. The resolution results are generally very fine except at 18mm where the extreme border performance leaves something to be desired below f/5.6.
Excerpt: This is Sigma’s EX version of what is fast becoming a standard lens for digital SLRs with a cropped sensor. The lens carries the DC classification, signifying that it will only work on cameras with the smaller sensors.
Pros: In summary the main positive points of the Sigma 18-50mm f/2.8 EX DC are:, Quick, accurate autofocus, Small and light for an f/2.8 lens, Sharpest lens tested to date, Useful protective pouch
Cons: Negative points are:, CA wide open, Slight distortions at either end (Minor point)
Excerpt: 1. Opis Ponavadi testiramo nove, pravkar predstavljene objektive, tokrat pa sem se spravil, pravzaprav ne k testiranju objektiva, ker si ga pač lastim že več kot dve leti, temveč k pisanju testa.
Pros: - Ostrina, uporaben že pri f2.8, oster pri f3.2, - Zgradba, - Notranje ostrenje, tudi hitrost, - Cena, - Vrednost zaslonke f2.8 po celotnem razponu, - Minimalna razdalja ostrenja, - Priložena sončna zaslonka in torbica
Cons: - Kromatska aberacija do f5.6, - Glasno ostrenje
Summary: Az APS-C érzékelőmérethez készített nagylátószögű zoomobjektívek közül a Canon nagy fényerejű, stabilizált változatát már kipróbáltuk, következzen a Sigma hasonló képességű optikája, igaz stabilizátor nélkül.