The last wave of the #SunSingleContest# activities happened before the iPhone 8 Plus test. My friend @schoolfreshRon from school gave me a Sigma 17-50mm F2.8 lens, which looked really cool. He got it during Double 11 for 1899 yuan (he mentioned he also negotiated the price, and it's been strong for several years). With PLUS member coupons and 10,000 Jingdou, he ended up paying 1759 yuan.
However, the local JD.com warehouse had no stock. It was delayed until today, the 23rd. The product was shipped from Suzhou Outhouse. The delivery showed that the item went from the Suzhou warehouse to the Wuhan Asia Picking Center before being dispatched again. The distance is quite long, and I was worried about possible damage during transport.
When the courier arrived, my heart was pounding with 10,000 Jingdou in mind. Fortunately, upon opening the box, the lens was well packaged with no visible damage. I tried it out right away.
JD.com said that Sigma had removed the original seal, and the plastic film was their own. I had no choice but to accept it. It seems all imported goods from regular agents must have a Chinese label with origin and importer info.
This JD sealing film is pretty good, but I can’t help but feel it’s unnecessary. According to JD, other channels don’t even use this film. The original license comes with a three-year warranty, and buying an extended warranty on JD is quite convenient. There's an option for a two-year extension for $89, which I think is still cost-effective. Five-year warranty is also available, and I mainly didn't buy it because I wasn't sure if the full size would change.
The lens number ends with 9999, which is lucky. I hope it lasts a long time. Removing the JD film was satisfying, though I wish they didn’t need to seal it so tightly. Once removed, all the anti-theft measures are gone.
Inside the box were the manual, warranty card, and more. The anti-counterfeiting label was tampered with, which made me feel like I might have bought a fake. The package looked familiar, similar to my previous 8-12mm purchase, but shorter, since 17-50 isn't as long.
The lens case was well-made, and for this price, it's impressive. I thought the lens and hood would be in one bag, but they were packed separately, probably to prevent damage during shipping. The gold ring gives a pseudo high-end feel when used on a Nikon body. The closest focusing distance is 28cm, making it great for macro shots.
The AF switch is near the lens mount, and below it is the optical stabilization switch. When you turn the lens on or off, there's a pro-measure sound, but it only controls the electronic part, not the mechanical function. The lens cap felt cheap, with a recycled plastic look and discolored edges.
Opening the lens cover, the lens was clean and clear, with red and green coatings. The diameter is 77mm, and the Phoenix SPII UV filter is still on its way, though it's expensive. The lens mount has a shiny metal ring, suggesting the camera is new. Since it's not an internal zoom, the lens has a zoom cutout to prevent it from falling out.
At the wide-angle end, the lens is 91.8mm long, which is relatively short. At the telephoto end, it extends about 3.5cm, similar to my 8-12mm. The hood is larger to avoid black corners at the wide angle. On a Nikon body, it looks very harmonious with the APS-C format.
A quick focus test showed a slight shift, but with fine-tuning, it was easily corrected. Non-original lenses may have minor focus issues, but it's manageable. The images taken with this lens are soft in transitions and sharp in focus, perfect for small objects like phones.
Overall, the Sigma 17-50mm F2.8 EX DC OS HSM offers an affordable constant large aperture and decent build quality. However, the shaking noise and rotating focus ring during autofocus are drawbacks. Compared to the kit lens, it's a big upgrade, especially for Nikon APS-C users. If you're looking for a versatile, high-quality lens, this one is definitely worth considering at around 1800 yuan.
Backlight Power Meter Socket
WARNING!
Do not plug two or more meters together!
IMPORTANT
Don't plug in an appliance where the load
exceeds 16 Amp. Always ensure the plug of any appliance is fully
inserted into the meter outlet. If cleaning of the meter is required,
remove from mains power and wipe meter with a dry cloth.
KEYBOARD DEFINITION
1). SET: Set price with button UP.
2). MODE: Exchange display state.
3). UP: Set price combined with button SET.
GENERAL FEATURES
1).Display line power.
2).Display and memory accumulative total power quantity.
3).Display and memory total power charge of price.
THE DATA DISPLAY
Press MODE button the data displays as follows:
W →KWh →PRICE →COST/KWH
↑_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _↓
1). Plug in socket and power on, the meter will display real power.
2). Press MODE button once again and release, the meter will display accumulative KWh.
3). Press MODE button once again and release, the meter will display total power charge.
4). Press MODE button once again and release, the meter will display COST/KWH.
SETTING PRICE OF COST/KWH
1). Press SET button during display COST/KWH,the first digital COST/KWH flash, press UP button to set it.
2). Press SET button once again and release, the second digital COST/KWH flash, press UP button to set it.
3). Press SET button once again and release, the third COST/KWH flash, press UP button to set it.
4). Press SET button once again and release, the fourth COST/KWH flash, press UP button to set it.
5). Press SET button once again and release, the radix point COST/KWH flash, press UP button to set it.
DATA CLEAR
Press and hold MODE button for 5 seconds will clear KWH,PRICE and COST/KWH data.
Power Meter Plug Energy Monitor,Backlight Power Metering Socket,Blue Backlight Power Meter Socket,Multi-functional Backlight Power Meter Socket
NINGBO COWELL ELECTRONICS & TECHNOLOGY CO., LTD , https://www.cowellsockets.com