The last wave of the #SunSingleContest# activities took place before the iPhone 8 Plus test. My friend @schoolfreshRon gave me a Sigma 17-50 F2.8 lens, which looked really cool. During the Double 11 sale, he got it for 1899 yuan (it’s said that he also negotiated the price, and it has been strong for several years). With PLUS members’ coupons and 10,000 Jingdou, he ended up paying 1759 yuan.
However, the local JD.com warehouse was out of stock, so the delivery was delayed until today, the 23rd. The product was shipped from Suzhou Outhouse.
The express order showed that the item was sent from the Suzhou warehouse to the Wuhan Asia Picking Center and then dispatched again. The distance was quite long, and I was worried about possible damage during transport.
When the courier arrived, my heart was pounding with excitement—10,000 Jingdou were on the line!
Thankfully, when I opened the box, the lens was well packaged and showed no visible damage. I tried it right away.
JD.com mentioned that the Sigma lens had its original seal removed, and the plastic film was actually JD.com's own. Whether or not I believed it, I had to accept it.
It seems that all lenses imported by regular agents must have a Chinese label with origin, importer, and other details. The sealing film is quite high quality, and I couldn't help but feel it was overkill. According to JD.com, other channels might not even have this kind of film.
The lens came with a three-year warranty, and purchasing an extended warranty through JD.com is relatively convenient. There's also a two-year extension available for 89 dollars, which I think is still very cost-effective. Five-year warranty options are also available, and I mainly hesitated because I wasn’t sure if the warranty would affect the full size.
The lens serial number ends with 9999, which is a nice touch. I hope it lasts a long time.
Tearing off the JD.com film was a bit frustrating, as it seemed unnecessary. Removing the film felt like removing a protective measure against tampering.
Inside the box, there was the manual, warranty card, and other documents.
The anti-counterfeiting label was tampered with, making me feel like I might have bought a fake product.
The lens package looked familiar, similar to my previous purchase of the 8-12mm lens, but it was shorter. That’s because the 17-50mm itself isn’t long.
The lens case was of good quality, and for this price, it’s quite impressive.
I originally thought the lens and hood would be in one plastic bag, but they were actually packed separately. This might be to prevent damage during transit.
The Sigma 17-50 F2.8 EX DC OS HSM has a gold ring that gives a pseudo-high-end feel when used with a Nikon body.
The closest focusing distance is 28cm, and it performs well for macro shots, especially for small objects.
The AF switch is near the lens mount, and below it is the optical stabilization switch. When you turn the lens on or off, it makes a slight sound. It seems this switch only controls the electronic part and doesn’t have mechanical limits.
The lens cap feels cheap, made of recycled plastic with noticeable discoloration around the edges.
When I opened the lens cover, the lens looked shiny and clear, with red and green coatings. The lens diameter is 77mm, and the Phoenix SPII UV filter is still on its way. It’s expensive, but worth it.
The lens mount has a metal snap ring that looks shiny and wear-free. It should be brand new, so the camera must be in good condition.
Since the Sigma 17-50 isn’t an internal zoom lens, and the lens group is heavy, Sigma included a zoom lock to prevent it from falling out when at the wide-angle end. This feature highlights the importance of the lens mount UV protection.
At the wide-angle end, the lens is 91.8mm long, which is relatively short compared to other lenses.
At the telephoto end, it extends about 3.5cm. This length is acceptable and similar to my 8-12mm lens, though the latter is an internal zoom and doesn’t change shape.
The lens hood is larger to avoid black corners at the wide-angle end.
On the camera body, it fits nicely with a Nikon APS-C body, creating a harmonious look.
A quick test showed the focus slightly shifted, but with fine-tuning, the image became sharp. Non-original lenses can sometimes be slightly out of focus, but it’s usually fixable with the camera’s focus adjustment.
Below are some photos taken with this lens on the D7000. The transition is smooth, and the focus is sharp. It works well for capturing small items like a phone.
Overall, the Sigma 17-50 F2.8 EX DC OS HSM offers great value for its price. It has a constant f/2.8 aperture, solid build quality, and comes with useful accessories. However, the noise from the stabilization system and the rotating focus ring during autofocus are minor drawbacks. Compared to kit lenses, it’s a significant upgrade, especially for Nikon APS-C users. If you’re looking for a versatile, high-quality lens at a reasonable price, this one is definitely worth considering.
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