Tamron 10-24mm f/3.5-4.5 DI II APS-C Lens for Canon EF-S Mount {77} B001

10-24mm ultra-wide for APS-C Canon shooters who need reach.

The Tamron SP AF 10-24mm f/3.5-4.5 Di II covers a focal range that translates to roughly 16-38mm equivalent on APS-C Canon bodies, giving you genuine ultra-wide coverage without stepping into full-frame glass. The Di II designation means it's built specifically for crop-sensor cameras, so the optical formula is tuned for that format than adapted from a full-frame design. LD (Low Dispersion) glass elements work to reduce chromatic aberration across that wide zoom range, where color fringing is otherwise a persistent problem. Aspherical elements address the distortion and field curvature that plague rectilinear ultra-wides at 10mm. Internal Focusing keeps the front element stationary during autofocus, which matters when you're using a polarizer on that 77mm filter thread, the filter doesn't rotate as the lens focuses.

The f/3.5-4.5 aperture range is honest for this focal length class. At 10mm you get f/3.5, which gives enough light for interiors and golden-hour landscapes without flash. This is a proven optical design for APS-C Canon shooters who want a dedicated ultra-wide zoom that doesn't require full-frame compromises.

Who It's For

Architecture and interior photographers working with APS-C Canon bodies will find the 10mm end genuinely useful in tight spaces where even a 16mm equivalent isn't enough. Landscape shooters who want to foreground-heavy compositions at the 10mm end benefit from the aspherical elements controlling distortion in straight-line subjects like horizons. Travel photographers carrying a compact kit get meaningful wide-to-normal coverage in a single lens, with the 77mm filter thread accommodating ND and polarizing filters. Event and documentary shooters working in confined venues appreciate the Internal Focusing, which keeps lens behavior predictable without the front element extending into the frame.

Key Features

• 10-24mm focal range with 16-38mm equivalent on APS-C
• f/3.5-4.5 aperture across the zoom range
• Di II optical formula built for crop sensors, not adapted from full-frame
• LD glass elements reduce chromatic aberration
• Aspherical elements control distortion and field curvature
• Internal Focusing keeps front element stationary for polarizer use
• 77mm filter thread

FAQ

What's the actual field of view on a Canon APS-C body?

The 10-24mm focal length translates to approximately 16-38mm equivalent on crop sensors, giving you genuine ultra-wide coverage without needing full-frame glass.

Why does Di II matter for this lens?

Di II means the optical formula is designed specifically for APS-C sensors rather than adapted from a full-frame design, so you get better correction and edge performance on crop bodies.

How does Internal Focusing help with polarizers?

The front element stays stationary during autofocus, so a polarizer on the 77mm filter thread won't rotate as the lens focuses-you keep your filter angle locked in.

Will this lens have chromatic aberration at the wide end?

LD (Low Dispersion) glass elements reduce color fringing, but at 10mm on an ultra-wide you should still expect some in high-contrast edges-it's inherent to the focal length, not a defect.

Is f/3.5-4.5 enough light for indoor work?

At 10mm you get f/3.5, which is adequate for interiors and golden-hour landscapes without flash; stops darken as you zoom to 24mm.

How does this handle distortion at 10mm?

Aspherical elements address field curvature and distortion typical of rectilinear ultra-wides, though some barrel distortion is normal at the widest focal length.

What's the filter thread size?

77mm, standard for mid-range zooms and compatible with most polarizers and ND filters.