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Amazon.com : Sigma 10-20 mm f4-5.6 EX DC for SLR Cameras with 4/3rd Mount Black : Camera Lenses : Electronics
![File:Nikon D50 with Sigma 10-20mm 4-5.6F EX DC HSM lens and Canon EOS 5D with Sigma 12-24mm F4.5-5.6 II DG HSM lens.jpg - Wikimedia Commons File:Nikon D50 with Sigma 10-20mm 4-5.6F EX DC HSM lens and Canon EOS 5D with Sigma 12-24mm F4.5-5.6 II DG HSM lens.jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/5/5f/Nikon_D50_with_Sigma_10-20mm_4-5.6F_EX_DC_HSM_lens_and_Canon_EOS_5D_with_Sigma_12-24mm_F4.5-5.6_II_DG_HSM_lens.jpg)
File:Nikon D50 with Sigma 10-20mm 4-5.6F EX DC HSM lens and Canon EOS 5D with Sigma 12-24mm F4.5-5.6 II DG HSM lens.jpg - Wikimedia Commons
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