Compare two products

Side by side	Tamron 17-70mm f/2.8 Di III-A VC RXD Lens for Sony E APS-C Mirrorless Cameras BlackCheck price on Amazon	Canon RF24-70mm F2.8 L is USM Lens, Mirrorless Lens, Standard Zoom, Compatible with EOS R Series Mirrorless Cameras, High Image Quality, Portraits, Landscapes, Travel, Photography, BlackCheck price on Amazon
Buyer rating	★★★★★4.8	★★★★★4.8
Price	$599.00	$2,399.00
Our score	8.7/10	8.7/10
Buyer ratings	1,779 ratings	682 ratings
Brand	Tamron	Canon
Best for	Everyday Sony APS-C video and photo work	Professional Canon full-frame commercial and event work
Optical versatility	9.2/10	9.2/10
Build quality	8.3/10	9.0/10
Autofocus and handling	8.7/10	—
Stabilization effectiveness	8.5/10	—
Value proposition	9.0/10	—
Autofocus & stabilization	—	9.3/10
Ergonomics & handling	—	8.4/10
Price to performance	—	7.8/10
Compatible Camera Mount	Sony E	Canon RF
Compatible Camera Models	Sony A6100, Sony A6400, Sony A6600	EOS RP, EOS R, EOS R5, EOS R6
Focal Length Description	17-70mm 2.8	24-70 lens
Lens	Standard	Standard
Maximum Focal Length	7 centimeters	7 centimeters
Minimum Focal Length	17 millimeters	2.8 millimeters
Lens Design	Zoom	Zoom
Focus Type	Auto Focus	Auto Focus
Lens Fixed Focal Length	17 millimeters	7 centimeters
Lens Coating Description	Fluorine and BBAR (Broad-Band Anti-Reflection) Coating	Air Sphere and Fluorine Coatings
Zoom Ratio	4.1	2.92:1
Image stabilization	Optical	Optical
Real Angle Of View	79 degrees	84 degrees
Maximum Aperture	2.8 millimeters	2.8 f_stop
Minimum Aperture	22	24 millimeters
Number of Diaphragm Blades	9	9
Our verdict	This lens provides an extensive 17-70mm focal range paired with a constant f/2.8 aperture for Sony E-mount APS-C cameras. Built-in vibration compensation is an asset for video and camera bodies without sensor shift. The constant aperture demands a larger, heavier front barrel than typical variable-aperture kit zooms.	A cornerstone lens for professional full-frame Canon mirrorless systems, offering a constant f/2.8 aperture and 5-stop optical stabilization. Weather sealing and edge-to-edge optical resolution justify its placement on working production kits. At $2,399, it is a substantial investment that adds meaningful weight to an all-day setup.
Pros and cons	+ Constant f/2.8 aperture across range + Integrated VC image stabilization + Versatile 17-70mm focal coverage − Noticeably larger than standard kit zooms − APS-C coverage limits full-frame compatibility	+ Constant f/2.8 aperture with image stabilization + Robust L-series weather-sealed construction + High resolution across the zoom range − Significant $2,399 capital cost − Substantial weight on extended handheld shoots

Prices and buyer ratings are captured snapshots. A dash means the detail was not recorded, not that a feature is absent. Editorial scores are research assessments, not laboratory measurements.

Our buyer's guides show the full spec ranges and price tiers for a category, which is usually the faster way to narrow a shortlist before comparing two finalists.