50-100mm F1.8 DC HSM Art
Canon EF
Sigma 50-100mm F1.8 DC HSM Art

About

This is a full frame Canon EF mount lens introduced by Sigma 8 years ago. Its focal range is 50100mm with an aperture of ƒ/1.8. You can find a review of it on DPReview.

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New
Used
Starting at $691
KEH is American and has slightly higher grading standards, while MPB is originally from the UK. Both are global leaders in used lens trading.