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The general trademark of a manufacturer by which the consumer knows its products. A manufacturer can have multiple brand names. Some manufacturers license their brand names to other producers.
Product name:
Product name is a brand's identification of a product, often a model name, but not totally unique as it can include some product variants. Product name is a key part of the Icecat product title on a product data-sheet.
EF17-40 MM 1:4.0 L USM
Product code :
The brand's unique identifier for a product. Multiple product codes can be mapped to one mother product data-sheet if the specifications are identical. We map away wrong codes or sometimes logistic variants.
Category :
The light-gathering device of a camera, typically containing a group of compound lenses. Lenses come in different lengths, with very long lens used for long-distance photography.
camera lenses
Data-sheet quality: created/standardized by Icecat
The quality of the product data-sheet can be on several levels:
only logistic data imported: we have only basic data imported from a supplier, a data-sheet is not yet created by an editor.
created by Canon: a data-sheet is imported from an official source from a manufacturer. But the data-sheet is not yet standardized by an Icecat editor.
created/standardized by Icecat: the data-sheet is created or standardized by an Icecat editor.
Included since: 27 Jun 2005
The date Icecat noticed for the first time that this product was included in the price list of a channel partner
Info modified on: 20 Dec 2013 11:44:02
The date of the most recent change of this product data-sheet in Icecat.
Product views: 38319
This statistic is based on the 61915 using ecommerce sites (eshops, distributors, comparison sites, ecommerce ASPs, purchase systems, etc) downloading this Icecat data-sheet since 27-06-05 Only sponsoring brands are included in the free Open Icecat content distribution as used by 60276 free Open Icecat users .
Long product name Canon EF17-40 MM 1:4.0 L USM:
The short editorial description of Canon EF17-40 MM 1:4.0 L USM

Marketing text Canon EF17-40 MM 1:4.0 L USM

The official marketing text of Canon EF17-40 MM 1:4.0 L USM as supplied by the manufacturer
A new and affordable L-series ultra-wide-angle zoom lens that's ideal for both film and digital SLRs. Superior optics are assured by the use of three aspherical lens elements, in addition to a Super UD (Ultra-low Dispersion) glass element. Optical coatings are optimized for use with digital cameras. This lens focuses as close as 11 inches (0.28 m), and offers both Canon's full-time manual focus and a powerful ring-type USM for fast and silent AF. It has a constant f/4 maximum aperture, and offers the choice of screw-in 77 mm filters or a holder in the rear of the lens for up to three gel filters. Finally, it offers weather-resistant construction similar to other high-end L-series lenses.
Short summary description Canon EF17-40 MM 1:4.0 L USM:
This short summary of the Canon EF17-40 MM 1:4.0 L USM data-sheet is auto-generated and uses the product title and the first six key specs.
Canon EF17-40 MM 1:4.0 L USM, 17 - 40 mm, Black
Long summary description Canon EF17-40 MM 1:4.0 L USM:
This is an auto-generated long summary of Canon EF17-40 MM 1:4.0 L USM based on the first three specs of the first five spec groups.
Canon EF17-40 MM 1:4.0 L USM. Focal length range (f-f): 17 - 40 mm. Colour of product: Black. Filter size: 7.7 cm, Weight: 500 g. Magnification: 0.24x
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Lens system
Focal length range (f-f)
Measure of how strongly the system converges or diverges light. For an optical system in air, it is the distance over which initially collimated rays are brought to a focus. A system with a shorter focal length has greater optical power than one with a long focal length; that is, it bends the rays more strongly, bringing them to a focus in a shorter distance.For an optical system in air, the effective focal length (f and f′) gives the distance from the front and rear principal planes (H and H′) to the corresponding focal points (F and F′).
17 - 40 mm
Colour of product
The colour e.g. red, blue, green, black, white.
Weight & dimensions
Filter size *
A filter is a screen, plate, or layer of a substance which absorbs light or other radiation or selectively absorbs some of its components e.g. a UV filter to reduce UV light. Filters come in various sizes.
7.7 cm
Weight *
Weight of the product without packaging (net weight). If possible, the net weight is given including standard accessories and supplies. Please note that sometimes the manufacturer leaves out the weight of accessories and/or supplies.
500 g
Other features
The degree to which something is or can be magnified (made to appear larger than it is).