![]() ![]() (Comparison is between SIGMA-produced components. As compared to polycarbonate containing 30% glass, it offers 25% higher elasticity. As compared to polycarbonate containing 20% glass, TSC offers approximately 70% higher elasticity. Since parts made with TSC expand and contract less due to changes in temperature, they tend to perform better under extreme conditions and help maintain the performance of the lens. * Thermally Stable Composite (TSC) offers thermal expansion characteristics similar to those of aluminum. TSC helps increase the precision of cells holding lens elements and parts related to the focus lens group, further enhancing lens performance. The SIGMA 30mm F1.4 DC DN | Contemporary features a lens barrel and aperture parts made of TSC, which contribute both to the compactness of the lens and the smooth functioning of the aperture system. Parts made of TSC are therefore less prone to develop gaps between each other over time. I'm going to keep mine.įind great deals at the TDS Photography Store on Amazon.Since new material Thermally Stable Composite (TSC) is highly elastic, it exhibits minimal deformation. ![]() But if you want a mild telephoto with a reasonably fast aperture for an affordable price, you'll probably like shooting with this glass. Overall, I rate the Sigma 30mm a notch below Olympus prime lenses. The lens should also look good on the black version on the new Olympus OM-D E-M5 body that is due to be released later this month. So this prime delivers a stop and a half more light at the same focal length. On the 14-42mm, f/3.5-5.6 Olympus zoom that comes with the PEN cameras, the aperture is f/5.0 at 30mm. I do like having the faster f/2.8 aperture at the 30mm focal length. Once everything is ready however, the lens focuses quickly, quietly, and accurately. It feels like the lens and camera are establishing communication during this delay. On start up, I also noticed that there's a 1-2 second delay before the lens was ready to shoot. I would upgrade your camera firmware if you plan on using this lens. For example, when I mounted it on my E-PL2 with firmware 1.0, the lens became hyperactive constantly adjusting the aperture with changing lighting conditions, even when locked down in Aperture Priority mode. It performs best when the camera's firmware is up to date. In this respect, it performs rather better than the Sigma 30mm f/1.4. little axial chromatic aberration, even when shooting wide-open. 90mm and 112mm on Sony E, Canon M and Micro Four Thirds bodies respectively, the f/1.4 aperture rating of this Sigma 56mm f/1.4 DC DN. The large aperture is great for lowlight and for. The Contemporary line is part of Sigma Global Vision and is the perfect blend of image quality and compact size. The Sigma 30mm F2.8 EX DN is an affordable prime lens for micro four/thirds users, especially useful for Olympus PENs because it doesn't have image stabilization built into the lens. Sigma 56mm f/1.4 DC DN C review The Sigma 56mm f. The Sigma 30mm 1.4 DC DN Contemporary is a high performance prime with a large aperture of F1.4 designed for APS-C Mirrorless cameras including Sony E mount and Micro Four Thirds. You can soften the background when shooting wide open with the Sigma 30mm. It has decent close-up ability allowing for 1:8.1 magnification at 11.8" ![]() Since the 30mm behaves like a 60mm mild telephoto with the micro four/thirds sensor (crop factor of 2X), you can soften the background when shooting wide open. A lens hood is not included, but you do get a nice zippered case. Threads on the front of the lens accept 46mm filters and accessories. You can manually focus on the fly using the large knurled ring at the front of the lens. On the camera, autofocusing is fast and smooth. Sigma 30mm (center) compared to the Olympus 45mm and 17mm primes. I'm guessing that this is a byproduct of Sigma's new linear focusing system. Once you turn the camera on, it engages, eliminating movement until you actually focus. But the lens mechanism inside does move around when not in use. Despite its greater diameter, it's still very light (135g / 4.8oz). On the PEN Mini, the Sigma looks a little oversized. ![]() On the E-PL2 body (shown above), it looks great. The first thing I noticed with the Sigma 30mm is that it's larger than the two Olympus primes. I've been testing the 30mm F2.8 EX DN ($199 US) because it fits nicely between my Olympus 17mm f/2.8 ($219) and the longer 45mm f/1.8 telephoto ($399). Sigma has released a pair of prime lenses for micro four/thirds cameras, such as the Olympus PENs. ![]()
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