Sony DT 30mm F2 8 Macro SAM Análisis | 54 Datos comparados

The ePHOTOzine review highlights the Sony DT 30mm f/2.8 SAM Macro as a lightweight (150g), compact, and budget-friendly 1:1 macro lens for APS-C Sony Alpha cameras, offering a 45mm equivalent focal length suitable for general photography. Pros include exceptional value, solid build quality, and respectable sharpness, with optimal performance achieved between f/8 and f/11. Conversely, the lens exhibits soft resolution at the maximum f/2.8 aperture and requires very close working distances for 1:1 magnification, which can cause lighting challenges. Other cons include minor chromatic aberrations, noticeable geometric distortion, and a slightly noisy Smooth Autofocus Motor (SAM).

The Sony DT 30mm f/2.8 Macro SAM is a compact, budget-friendly prime lens that stands out for offering a genuine 1:1 macro capability for APS-C sensor cameras. Its design features a simple barrel with an AF/MF switch and a front manual-focusing ring with a massive 200-degree throw to allow for highly precise close-up adjustments down to just 0.13 metres. While the lens barrel does protrude slightly when focusing on nearby subjects, Sony has minimized this extension to less than 2cm compared to its position at infinity focus. Due to its modest f/2.8 maximum aperture, the lens features a very small 17mm front element and a 49mm filter thread. The review highlights several critical pros and cons regarding the lens's build and performance. On the positive side, its primary strengths are its affordable price point, compact form factor, and truly excellent real-world macro results. However, the lens suffers from notable drawbacks, including a manual-focusing ring that rotates during autofocus mode—requiring users to keep their fingers clear—and a modest f/2.8 aperture that limits shallow depth-of-field flexibility on APS-C sensors. Additionally, lab-based technical...

The Sony 30mm f/2.8 DT macro (SAL-30F28) is an affordable macro prime lens tailored exclusively for Sony Alpha APS-C format DSLRs. It provides a full-frame equivalent focal length of 45mm and a maximum 1:1 magnification ratio, making it highly versatile. On the plus side, the lens features Sony's Smooth Autofocus Motor (SAM) instead of an older mechanical screw-driven autofocus system. This integrated autofocus system operates at a reasonably fast speed. Additionally, the 49mm non-rotating front filter ring is highly practical for users who enjoy using polarising filters, and the compact lens weighs a mere 150 grams. However, the lens has several notable drawbacks in its physical construction and usability. The overall build quality is average at best, sporting a completely plastic body and a plastic lens mount. Its linear extension focusing system features slightly wobbly inner lens tubes that extend outward during operation. The tiny focus ring stays physically locked to the internal motor during autofocusing, causing it to spin constantly, and Direct Manual Focusing (DMF) is completely unsupported. Finally, the extremely short 2cm working distance from the lens front...

The Sony DT 30mm F2.8 Macro SAM lens receives an overall DXOMARK score of 23 when tested on the Sony SLT Alpha 77 II camera body. Originally released in August 2009, this lens delivers a very strong sharpness score of 17 P-Mpix. It handles geometric distortion effectively, restricting it to a mild 0.4%. Additionally, light transmission is highly efficient, measured at 2.9 T-stop against its f/2.8 maximum physical aperture. However, the lens exhibits clear performance drawbacks in peripheral image quality. Vignetting is a prominent issue, resulting in a significant light drop-off of -1.6 EV in the corners. Chromatic aberration also poses a noticeable problem, measuring at 7 µm. Despite these optical flaws in shading and color fringing, its strong sensor resolution optimization and low distortion make it a highly capable macro option for compatible Sony Alpha mount DX-format systems.