Tuesday, December 20, 2011
The 3-Lens Solution
Be prepared to work in any situation with an efficient set of high-quality optics that covers the majority of focal lengths
|This Article Features Photo Zoom|
Sigma's DSLRs are APS-C (the pro SD1 model having a 1.5x focal-length factor and the others with a 1.7x factor). So a good pro kit would be the 12-24mm ƒ/4.5-5.6 DG HSM II, 24-70mm ƒ/2.8 EX DG HSM and 50-150mm ƒ/2.8 HSM. For Sony's APS-C DSLRs, you could replace the full-frame kit's Zeiss 16-35mm with the Sony DT 11-18mm ƒ/4.5-5.6, a little "slow" compared to the ƒ/2.8 zooms, but a good lens nonetheless (this would leave a gap between 18mm and 24mm in the three-lens kit). The new DT 16-50mm ƒ/2.8 SSM is weather-resistant and also a good choice, if 24mm (35mm camera equivalent) is wide enough for you.
The independent lens makers offer lenses specifically designed for APS-C sensors (you also can use lenses designed for full-frame and 35mm film cameras). Good Sigma APS-C choices include the 10-20mm ƒ/3.5 EX DC HSM or 10-20mm ƒ/4-5.6 EX DC HSM, the 17-70mm ƒ/2.8-4 DC Macro OS HSM and the 17-50mm ƒ/2.8 EX DC HSM, 18-50mm ƒ/2.8-4.5 DC OS HSM or 17-70mm ƒ/2.8-4 DC Macro OS HSM (OS lenses incorporate Optical Stabilization). Tamron offers the SP AF10-24mm F/3.5-4.5 Di II and the SP AF17-50mm F/2.8 XR Di II (with or without Vibration Compensation). Good Tokina APS-C options include the AT-X 11-16mm ƒ/2.8 PRO DX, AT-X 12-24mm ƒ/4 PRO DX II and AT-X 16.5-135mm ƒ/3.5-5.6 DX.
For Four Thirds System DSLRs. Olympus' Four Thirds System cameras have a 2x focal-length factor, so a primary kit would include the 7-14mm ƒ/4.0, 14-35mm ƒ/2.0 SWD and 35-100mm ƒ/2.0. Lower-cost, but still pro-quality Olympus Zuiko Digital zooms include the 11-22mm ƒ/2.8-3.5, 12-60mm ƒ/2.8-4.0 SWD and 14-54mm ƒ/2.8-3.5. All of these lenses were designed specifically for the 17.3x13.0mm Four Thirds System image sensor.
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