Vignetting performance is decent - You might notice some minor vignetting if your subject or background is a solid color,Įxtends to the corners of the frame and the lens is used at f/2.8. Right side sharpness is very good, but left side sharpness is very bad. If proper focus is achieved, images are sharp wide open and even better stopped down a stop or so. The optical quality of the Sigma 18-50mm f/2.8 EX DC Lens is decent - it delivers good results for the price. The same lenses are pictured fully extended below and with hoods later in the review. Pictured above from left to right are the (this is a nice feature if you are used to Canon lenses - and especially if you are mixing this lens with other Canon lenses in a kit).Ī zoom lock switch is provided but not needed with my copy of this lens as the zoom ring requires a firm force to twist.īoth zoom and AF (autofocus) rings turn smoothly. 2x magnification factor.īoth the zoom and focus rings rotate the same direction of Canon's lens rings The Sigma's 18-50's minimum focus distance is 11" (0.28m) and provides a reasonable. This is an internal-focusing lens - It does not change length during focusing and the front element does not rotate.įTM (Full Time Manual) focusing is not supported - and - the focus ring turns during autofocusing. In real world use, I missed a noticeably higher number of shots than I should have.ĪF performance was especially poor in low light (where focus hunting is frequent). When shooting the very well-lit ideal focus point on ISO 12233 chart tests using AF,Įvery other image was completely out of focus at 18mm f/2.8 and AF was inconsistent at 24mm. The Sigma 18-50's AF sound is relatively quiet but not silent like an HSM or USM lens.ĪF accuracy was also on the low side of average. Measuring 2.9 x 3.3" (74.1 x 84.1mm)(d x l) and weighing 15.7 oz (445g), the Sigma balances and handles very nicely - and feels solid. Like Canon's EF-S Lenses, the 18-50 DC is compatible only with 1.5x/1.6x crop factorīeing sized for a smaller-format sensor allows a smaller and less expensive design to be used.Īnd, the overall size and weight of the Sigma 18-50mm f/2.8 EX DC Lens is ideal for the cameras it is designed for. The Sigma 18-50mm f/2.8 EX DC Lens contains a nice general purpose focal length range, is well-built and does not cost a fortune. Note: The Sigma 18-50mm f/2.8 EX DC Lens has been replaced by the Sigma 17-50mm f/2.8 EX DC OS HSM Lens. Sony Electronics Announces Free 4K 120p Upgrade for ZV-E1 MILC.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |