[Sony E] I’m very much enjoying this lens as it is hot spot free for my infrared photography. Great and extremely reasonably priced lens.

[Full-Frame] I don't actually love this lens because composition is a challenge with this focal length: it's hard to keep stuff you aren't interested in out of the frame, and perspective distortion is a big issue. The five star rating assumes you want to experiment with this focal length.

None of the other issues I found with this lens are worth taking a star off:

1. The lens is reasonably sharp. I've attached a crop from the center and what I judge to be the worst corner on my copy (shot on a 45 megapixel Z8, f/2.8, ISO 64, 1/250 second). You will notice that in the corner crop, the tower appears to be significantly bigger, and tilted. That's perspective distortion in action.

2. There is some chromatic aberration in out of focus areas. Depending how picky you are about such things, you might want to avoid out of focus tree branches against a white sky when using this lens.

3. The lens has a lot of vignetting, which isn't corrected in out of camera JPEG images. I've attached a sample JPEG image.

4. The subject distance is miscalibrated on the Z8. It reports a focus at infinity as a focus distance of 10.24 meters in the exif data, and in manual focus mode will show the focus as being well short of infinity.

The lens reportedly has some field curvature, but I couldn't spot any indications of field curvature in my photos.

Bottom line: not a perfect lens, but good enough for most uses.

[Sony E] I've been using this lens primarily for low light shots of cars at night. It works great! It gets strapped on my Nikon Zf. My example photos were shot at a parking deck around 9PM at night in downtown Canton, OH.

[Autofocus] Crisp pictures and for the price, why not? It fits my camera perfectly and it is very sturdy. The edges do have a very tiny glare but not enough to not use it. like i said you pay what you get for usually but a lens this cheap being this good is rare. Definitely a pick up!

[40mm] As many YouTube channels have reported, what a deal for the price. Decent construction, engineering/design is primo, and 20MM is now my “walking around lens” because of its usefulness and pix quality. Even at 20MM, most people are not aware of how wide the view is until they compare to “normal” shots done with a 35-50MM lens. It’s easy to keep lines from converging in shots that are subject to convergence.

No regrets from me, for sure!

[0.14x] Viltrox impresses again with this little lens! Great optics and natural field of view. Paired with my Nikon Z5, it is great being just wider than a 50mm but a bit tighter than 35mm. Absolutely perfect for everyday photography of family, street, travel, etc. and the autofocus is fast and accurate. I have had nothing but positive experiences with Viltrox equipment and this lens continues that!

[f/2.5] Everything positive you’ve heard about this cheap lens is true. Light, fast, and good build quality, it punches with the quality of a $500-$700 lens. Very enjoyable on the Sony A7IV!

[40mm] This is my first Viltrox lens and I am using it on my Z7. I mostly shoot landscapes, cityscapes, and whatever randomness I see. This lens is super fast, quiet, very lightweight, and really sharp especially for the price. I know people will compare it to the Nikon 40f2, but this is around $80-$100 less, which I why I went with it. I’m enjoying it so far and will definitely buy more from Viltrox in the future.

[Autofocus] I’ve been looking for a fairly wide 20mm prime for some time now. I had borrowed a friend’s Sig’16mm but too bulky for canid street, and concealed carry on my a6000. So when I first heard of this and saw a review on “the Tube”, I immediately went to the B&H site to find what they had to say and then it was a done deal the B&H reviewer hit the key areas of all my concerns and from what I’ve experienced so far, he was spot on. This is why I trust this store

Though I have been tied up with an ongoing project that wrapping up soon. Of what I have been able to use it’s insanely sharp, and haven’t seen any issues yet. I picked up this for an upcoming trip we have planned to northeastern Oregon and from the few shots I’ve taken so far I am very pleased with how it performs. For now it will primarily stay on my a7riii but it will be used on my a6000 and the a6700. I will chime in again after a few trips.

[f/16] This is a great buy for a lens that's light enough to take along anywhere and produces wonderfully sharp images.