Sigma AF 18-250mm F3.5-6.3 DC OS HSM

Hands-on Review: Sigma 18-250mm f/3.5-6.3 DC OS HSM

The barrel has a large zoom ring and a small manual-focusing ring at the front, with a zoom scale marked at 18, 24, 28, 35, 50, 80, 135, and 250mm. The three switches on the barrel include Zoom Lock, AF/MF, and stabilization ON/OFF.

Sigma 18-250MM F/3.5-6.3 DC Macro OS HSM Lens

Sigma's DC 18–250mm f/3.5–5.6 Macro OS HSM lens is designed to be an all-in-one lens and the focal length is one of the widest available on the market. It was specifically designed for use with an APS-sized sensor, which makes it more like a 24–300 lens, depending on the crop factor of the camera...

The new Sigma 18-250mm F3.5-6.3 DC Macro OS HSM differs from Sigma's earlier 18-250mm F3.5-6.3 DC OS HSM lens in that it's physically smaller and lighter, it has better macro capability and it uses sigma's TSC (thermally stable composite) material which minimizes the effect of temperature on the...

TSC, which is incorporated into the lens barrel and is often compared to polycarbonate, has a high degree of elasticity and exhibits little variation in its structure in extreme temperature conditions.