Tamron SP 15-30mm f/2.8 Di VC USD G2 Lens for Canon EF Camera Batteries Circular Aperture Yes

Circular Aperture Yes

but the light may also be controlled remotely

Aperture f/2

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Tamron SP 15-30mm f/2.8 Di VC USD G2 Lens for Canon EF Camera Batteries Circular Aperture YesThe second generation Tamron SP 15 30mm f 2. 8 Di VC USD G2 for Nikon and Canon DSLR cameras is a handy and versatile lens designed not only to cover a range of breathtaking ultra wide angle perspectives for full frame camera systems but also to capture sharp and clear imagery with its sophisticated optics. Its focal range offers an equivalent of 22. 5 45mm when mounted on DX format models while its fixed maximum aperture of f 2. 8 produces well