Sigma 24mm f/1.8 EX DG Aspherical Macro Large Aperture Wide Angle Lens for Canon SLR Cameras
by SIGMA
Our Price: $549.00
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Buy Used: from $489.00 (click here)
Category: Digital Camera
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Digital Photo Product Details
Manufacturer: SIGMAModel: B00005RKSO
Product features:
- Filter Size: 77mm f/Stop Range: 1.8-22 Minimum Focus Distance: 7.1 Magnification: 1:2.7 Zoom/Focus C
- AmazonBasics Lens Pen Cleaning System
- Corel Photo & Video Pro X3 Bundle [Old Version]
- AmazonBasics Universal Camera Case for Digital Cameras HF (Black)
- AmazonBasics Camcorder/Camera Bag with Shoulder Strap (Black)
- Dolica CF-U77 77mm UV Filter
Digital Cameras Photo Reviews of Sigma 24mm f/1.8 EX DG Aspherical Macro Large Aperture Wide Angle Lens for Canon SLR Cameras
Customer Review: This lens front focus so bad that even at f/4, picture is a smudge
Summary: 1 Stars
Sigma 24mm f/1.8 EX DG Aspherical Macro Large Aperture Wide Angle Lens for Canon SLR Cameras
I have tested this lens on 3 different Canon bodies (two 20d, one xti). Lens front focus a lot. Period.
I am currently returning this lens to amazon for an exchange. I will not return a lens to factory to have it re-calibrated. I have heard people returning it to factory 2 or 3 times and lens still come back bad. It is sad and I am just furious over Sigma's QA. How is it possible they miss such bad copy?? Do they not test lens anymore? Why can't they create a department specifically dedicated to testing every single lens that gets shipped? (read below regarding condom testing). Is this difficult to implement? No. Will Sigma win more customers if they do? Yes. Here's the plan: Setup a few workstations, mount the camera on a fixed post in such a way that it's not ever movable, tether camera to computer, shoot in jpg, and view image either via AI / MTF score so there's a threshold to either reject or accept.
What are these lens CEO thinking??? This comment goes out to all lens manufacturers. I can't wait until there's a lens manufacturer that will implement the above test and take the industry by storm. In fact, scribe the employee id onto the parts on the product line so that they figure out who is the culprit and dispense disciplinary action. I paid 1 day over night DHL to have this lens rushed to me because of all the excitement, but boy was I disappointed. I can only hope the next copy will be up to factory spec.
Also note that customers do zoom into the image. So testing must be done at 1:1 viewing. Whether I zoom in or out, the picture is just a low quality fuzz. I am a wedding photographer and I have many lens, canon and tamron, and I do know how to test lens. I think the MTF threshold idea is brilliant and the employee ID on the parts is critical to getting high quality products. Actually, Employee ID to whoever assemble that part / lens. Companies should form a division to accept returned lens, take apart, and find the culprit, and trace employee id. This is long over due... how is it acceptable to have such poor quality control?
I'd like to know:
a) Where are the QA managers?
b) Do companies only care to mass produce and sample test once a while?
c) *** How long does it take to build a lens compared to electronically test a lens? If every condom is tested electronically, then why can't lens be tested. A quality condom is less than 1 dollar each!! Somebody got to be held responsible for these poor quality lens. If the above review is true that it's sharp, then the lens design is sound, so the issue is QA.
Update: I have purchased and exchanged at least 2 copies of this lens through Amazon. Read comments below.
More Sigma 24mm f/1.8 EX DG Aspherical Macro Large Aperture Wide Angle Lens for Canon SLR Cameras reviews:
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Description of Sigma 24mm f/1.8 EX DG Aspherical Macro Large Aperture Wide Angle Lens for Canon SLR Cameras
The large aperture wide-angle lens for close up photography. This large-aperture wide-angle lens is equipped macro focusing capability with a maximum magnification of 1:2.7 and fast F1.8 maximum aperture. The use of aspherical lenses are offered for superior peripheral brightness and compensation of aberrations and astigmatism. This is an ideal DG lens for Digital SLR cameras. Macro capability This lens is capable of Macro photography at minimum focusing down to 18cm (7.1 inch) (reproduction ratio 1:2.7). It incorporates the floating focus system in order to minimize distortion, spherical aberration and astigmatism, which provide high performance at all shooting distance down to 18 cm (7.1 inch). Reproduction ratio 1:2.7 and an angle of view of 84.1allow capturing of high quality images not only a subject but also the surrounding scenery. Large front element and Super wide-angle This lens has an advanced optical construction, in order to obtain adequate peripheral brightness at open aperture. Also, the iris diaphragm has 9 diaphragm blades to obtain beautiful out of focus images in the foreground and background. Handling This lens also incorporates a Dual-Focus (DF) mechanism. It is easy to hold the lens, since the focusing ring does not rotate during auto-focus, yet it provides adequate focusing torque of the focusing ring during manual focusing of the lens. Also this allows the use of a Petal-type Hood , which is superior light blocking effect. Aspherical lens It incorporates a floating focus system and uses two aspherical lens elements for minimizing distortion, spherical aberration and astigmatism. Specifications: Lens Construction 10 Elements in 9 Groups Angle of View 84.1 degrees Number of Diaphragm Blades 9 Blades Minimum Aperture F22 Minimum Focusing Distance 18cm/7.1 in. Maximum Magnification 1:2.7 Filter Size Diameter 77mm Dimensions Diameter 83.6mm X Length 82.5mm Weight 485gLenses
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