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Canon EF 17-40mm f/4 L USM Lens Vignetting Test Results         Vignetting Test Chart Help

Buy the Canon EF 24-70mm f/2.8 L USM Lens
 Shorter Focal LengthLonger Focal Length       Narrower Aperture
Buy the Canon EF 24-70mm f/2.8 L USM Lens
 Shorter Focal LengthLonger Focal Length       Wider ApertureNarrower Aperture

Canon EF 17-40mm f/4 L USM Lens Review
Buy the Canon EF 17-40mm f/4 L USM Lens
Canon EF 24-70mm f/2.8 L USM Lens Review
Buy the Canon EF 24-70mm f/2.8 L USM Lens
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My Recommended Canon EF 17-40mm f/4 L USM Lens Shopping Resources
B&H Photo
Adorama
Amazon.com
Beach Camera or BuyDig.com
Canon (new or refurbished)
(I cannot recommend specific sellers)
Buy Now - $100.00 rebate available from Apr 14 - Jun 1
(Using these links to make any purchase supports this site)
Rent the Canon EF 17-40mm f/4 L USM Lens
LensRentals.com
LensProToGo
(Using these links for your rental supports this site)

Please support this site by using the links provided throughout the site to make your purchases
Support us by clicking here to start your B&H shopping experience!
Using this link to make your purchase supports this site
 
Using this link to make your purchase supports this site
Using this link to place your ThinkTank Photo order supports this site. Should your order total more than $50.00, Think Tank Photo will send you a free gift with your order if this link is used
 
Using this link to place your Beach Camera order supports this site.
Canon Refurbished:
B&H Photo
Adorama
Canon Store (DSLRs)
Canon Store (Lenses & Flashes)
 
Fund New: Sell the Used:
Sell Used Gear at B&H Photo
(learn more)
Lensbaby

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