Xiao Biao Note: This article is submitted to the #Sun Shandan Contest# Call for Papers. It's the second quarter of 2017, and it's a warm season on the line. I've been picking up some great prizes throughout the year, such as an iPad, QC30, Kindle, and JD cards. Details about the event are available below.
First, the reason for purchase 1. As a photography enthusiast, I'm still in the early stage without any brain damage yet. 2. I bought the Sony A6500 during Double 11, but Sony's native lenses were disappointing. Plus, Sony hasn't updated its APS-C lens lineup for a long time, so I had no choice but to look for a large aperture lens. 3. The price was good enough, and after checking JD.com, the Sigma 30mm f/1.4 was the cheapest option with a large aperture automatic lens. Also, Sigma's reputation is solid. I previously rented the FE35mm f/1.4, but the price wasn’t right, so I went with the Sigma instead. SIGMA 30mm F1.4 DC DN Contemporary Technology Highlights: ▶ Uses double-sided aspherical lenses and various special materials to effectively reduce peripheral light loss and color distortion. ▶ Equipped with a stepping motor for quiet and fast focusing. ▶ Lens structure: 9 groups, 9 elements. ▶ Maximum aperture: f/1.4. ▶ Filter size: 52mm. ▶ Closest focusing distance: 30cm. ▶ Number of aperture blades: 9 (circular aperture). ▶ Maximum magnification: 1:7. This lens belongs to the Sigma Contemporary series. One of the key features of this series is achieving excellent optical quality while keeping the lens compact and lightweight. Sigma prides itself on its unique bokeh effect and fixed focal length lenses. The latest technology and design concepts from Sigma are integrated into this lens, ensuring a well-balanced performance across all aspects. Second, unboxing The packaging is very simple, similar to what I've seen before with other Sigma lenses, and it's eco-friendly. Produced in Japan. Joining the WeChat community. Sealing label. Warranty card, which shows a three-year warranty. Registration might extend it further. Unpacking the lens, which comes with a padded package. The lens is wrapped in a plastic bag. A family portrait. Overall black matte finish, not easy to show fingerprints. 30mm, f/1.4, 52mm filter size. Low-key Sigma logo. The focus ring is wide but can easily get dirty. Contemporary series C nameplate. This model number looks like a Sigma product. Lightweight hood, perfect for daily use without a UV filter. Lens model logo on the hood, but the material is prone to staining. Big eyes with green coating that suppresses glare and enhances image clarity. Good lens cap, much better than previous Sony caps. Metal iris diaphragm, not mounted on the body. Third, Sony FE35/1.4 appearance Thick lens body. ZEISS small blue label. Aperture ring with engraved details, retro style. Identify your identity, 35mm f/1.4. Iris switch, which can be switched between stepless and gear aperture. Smooth operation, ideal for video shooting. Lens body number. Looks like a green film. Red T* logo stands out. ZEISS. Origin: Thailand. Ass. Closest focusing distance is 0.3m. Fourth, simple test shots Let’s take a look at the blur, this is the Sony 30/3.5 shot at f/3.5. This is the Sigma 1.4. Obviously, the blur is more pronounced. Sometimes the background becomes distorted. Pat magazines. Love this kind of brainless approach. Look at the next distortion; the Sigma lens simulates E-mount, so you can enable lens correction. The first image is without correction, the second with. Click on the A6300, mount the lens on the A7II and activate APS-C mode. A7II + Sigma 30 compared with A6300 + Sony 30, seems more coordinated with the A7II. Look at the A6300, it looks a bit longer, but the black body with the black lens is a big love. Remove the hood, it looks even better. Next is the FE35/1.4, all shot at f/1.4 on the A7II. Since I rented the FE45/1.4 and returned it, there's no direct comparison. My master. Feixun M1, the dog on the right is Jingdong. It looks better than the Sigma 30. En, this is no brain deficiency... On the camera, thick black weight. However, it's really a pleasure to use. To sum up: After reviewing the review, the SIGMA 30mm F1.4 DC DN Contemporary not only achieved good resolution when fully open, but also reached middle to upper levels in almost all f/1.4 lenses. More importantly, the center resolution is nearly equal to the corner resolution, which is considered a top-tier performance for a 30mm lens. I haven’t had a chance to shoot much in the past two days, just did a quick unboxing, and I feel the quality is very high, much better than my hand on the Sony 30/3.5. It's not too big, works well with the A6300, supports AFC focusing, and video shooting is no problem. So far, I haven’t found any issues. For an APS-C lens, this is a high-value purchase. As for the FE35/1.4, the quality matches the price, so I plan to compare it with the original factory version soon. Less than 2000 RMB for the Sigma 30/1.4, it's definitely worth it.First, basic attributes
Voltage: 12.8V, which is the standard output voltage of the battery, is suitable for a variety of application scenarios requiring a 12V voltage source.
Technology Type: Lithium iron phosphate battery, using lithium iron phosphate (LiFePO4) as a positive electrode material, with high safety, long life and stable performance.
Second, application scenarios
Small electronic equipment: Because the 12.8V lithium iron phosphate battery has a suitable voltage and stable performance, it is suitable for some small electronic equipment that needs a stable power supply, such as portable power supplies, small UPS systems, etc.
Solar energy systems: In solar energy systems, 12.8V lithium iron phosphate batteries are often used as energy storage batteries in conjunction with solar panels to provide reliable power support for home, commercial or industrial applications.
Electric bicycles/motorcycles: Some electric bicycles or motorcycles also use 12.8V lithium iron phosphate batteries as a power source to provide lasting power support.
Emergency lighting and backup power: Due to its high safety and long life, 12.8V lithium iron phosphate batteries are also suitable for emergency lighting systems and backup power systems, ensuring a stable power supply in the event of power failure.
Third, performance characteristics
High safety: Lithium iron phosphate material has good thermal stability and chemical stability, so that lithium iron phosphate battery in overcharge, over-discharge, short circuit and other extreme conditions can still maintain a high safety.
Long life: Lithium iron phosphate batteries have a long cycle life and can maintain high capacity and performance after multiple charges and discharges.
Stable performance: Lithium iron phosphate batteries exhibit stable voltage and current output during operation, helping to protect electrical equipment from voltage fluctuations.
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