Sigma 20mm f/1.8 lens review with samples (Full-frame and APS-C) 

I bought this lens 8 years ago when I thought I was going to be into taking pics. Barely ever used it or took pics. But now that I'm going to be using a DSLR for my live streams, I'm excited to have the nicest chat in town

"Must have been smoking crack..." Funniest thing I ever heard Christopher say!

THX for a fast and profound information about this lens, i just wanted to try. Your video saves me a lot of time! Good work!

i prefer these reviews over non informative digitalrev reviews

8:35 xD . Great Video Christopher!! This is the lens that I bought and returned to the seller right away awhile back. Cheers!

You always make great revies, Christopher. I bought this lens cheap, always wanted a wide angle ptime on my 6D II. I use next to my Sigma Art primes.

Thank you for your detailed review.

Great great vids my friend!!! Love it, well done!!!!

Thanks! Was looking for this review

You are becoming the Ken Rockwell of RU-vid. Such a good review. WOW.

Best review of this lens I've seen

Yes!! You're reviewing this lens Chris?! :D I'm about to watch it right now ;)

Man you are the best and the most pro reviewer on youtube

thanks from brazil man! you rock on this review

I wanted a 20mm prime for my d750 and had been looking on line at the various options, whilst nosing around in a local junk shop I found one of these for £85 in mint condition.As a predominantly landscape photographer,I very rarely shoot wide open and I have been quite pleased with the results. As you say,at wide apertures its not the best tool in the box but at f8 its a good buy.

perfect review.. might be buying one of these used today.

Too funny. My cousin just got one today and I never even heard of the lens at all. Went to see what its all about and, of course, you've reviewed it! I've seen enough from you to know it's a lens that has no use for me. Great review as always.

8:36 I fell out of my chair 😂😂😂😂 that was so unexpected

very informative, thank you.

best lense reviews on youtube

Nice review Christ, and there also a ultra wide angle lens for fullframe is Sigma 14mm f2.8 out there, hope to see its review on your channel soon

Dear Christopher, I genuinely enjoy your in depth reviews on different lenses. I am currently thinking about acquiring either the depicted lens of this video, or the Samyang 20mm lens as I usually prefer completely manual lenses. Do you think it is possible for you to make a review on the Samyang at some point?

Nice review !!! So do u think its too loud in continuous AF during video? For interviews..

Thanks for this review. i was interested in this lens while shopping for wide angle lens with wide aperture on a budget. I decided not to get this or the sigma 18-50 f2.8 and I'm trying to buy the tamron 17-35 f2.8-4.

oh ya sorry how about sigma 20 f1.4 art series,which one is the best and sharpest one between nikon 20 f1.8 nano and milvus zeiss 21 f2.8?

Interesting, you gave the Sigma 20mm 1.4 such a great review :)

I picked this up in a bundle, effectively costing me less than £100, and for that money this thing is a beast! It has some flaws, but from an artistic point of view this lens produces unique and interesting photos. It works amazingly for night photography in cities for example, or astro, just be aware of the vignette!!

I get confused when full frame sensors and APS-C sensors get brought up. So this lens was designed for full sized sensors? I have an sl2 and have been trying to find a lens between 17-20mm for vlogging. But you mention this lens would be equivalent to a 35mm. I’m just confused on my sl2 would this still look like a 20mm lens or would it look like a 35mm lens?

A lot better than the 24mm that's for sure. I think I still go with a Rokinon.

What are the results on APS-C with the viltrox booster or meta ones ultra?

Do you test your lenses using autofocus? Most of the times I find that manually focusing using 10x live view produced sharper results. I think when you test 'sharpness' sometimes it could just be a test of its autofocus system rather than the glass quality itself. What do you think?

Hi Chris, love your videos! Any chance you can review the tamron 24-70mm f2.8 vc lens? Your videos always cover every aspect and I use your channel before buying any lens :)

hi Chris ive always found your reviews, very informative and interesting, and if it's ok, I would like to make a request if you can make a review on the Sigma 50-150mm f2.8 APO OS HSM coz i heard that its designed for APS-C cameras. Thank you.

It's not a horrible focus design either, it's the best once you get comfortable with it. The lens doesn't have a focus motor, so there's nothing to wear out, if you leave it in mf, it's just another extra shroud it has to drive around, which is the same for any other lens without a usm, and also the reason the newer lines are $600 more. The optics are basically just as good. IF you don't need a swm or usm, this lens is perfectly fine. None of mine protest too much if I just leave them in mf mode on occasion I don't even notice it. The canon is the only one that has that weird extra switch, not sure why, maybe for astral photography so you can lock focus off manually without touching any controls on the camera while it's pointed at the sky. Also I've never seen anything like that red flare ring pointing into the sun. It's interesting that the grips on yours are different than any I've seen for sale, maybe you had a super early version or something? I might guess it has more to do with the specific coatings on your canon vs other cameras interacting with this lens, as you see with samsungs that have severe purple fringing with uwa's and fisheyes.

En qué página podría comprarlo?? O que lugar sería bueno adquirirlo

Thank you for another great review, if possible i would really appreciate it if you review the Sigma 12-24mm/4.5-5.6 ll DG. Its the only full frame lens that would still give me an ultra wide range on my current crop sensor and i can still keep when i upgrade to full frame. i don't know if there are others that fit this description !

Bought just a Sony a77, with 5 Objectives a Flash a Portrait-Grip 3 Batteries for 300€😁 One of them was the Sigma. It's really nice

Hello, would you recommend the Nikon 20mm 1.8 over the Sigma 20mm 1.4 for the Nikon D500 for various subject matter?

do you have any information, how does it work withe the mc11 ? in particularly the af-c in video mode.

Would this work with bmpcc 6k?

sorry sir which one is the best and sharpest one between zeiss milvus 21 f2.8 japan or nikon nano 20 f1.8 g ed made in china? is this have a problem about distorsion sir if i use with d7000 and d700? could u please to give me some info,thank u very much

Hi Christopher, can you please review the Samyang 20mm f/1.8? Great video, by the way.

Is it for Sony E mount?

Any chance you could review Sigma's 28mm F/1.8 lens Chris? :)

Hey Christopher. Since I've got the 6D I'm planning on selling my 600D and all the lenses. When I've done that, I might aswell spend some cash on this lens :) I have the Samyang 14mm F/2.8, 24mm F/1.4 and the 35mm F/1.4, so having a 20mm F/1.8 wouldn't be bad. I heard you got it on ebay. From which country did you purchase it? :) Sincerely MrRapala91

smoking crack hehehe!!! i lov u man!!!!!!!

Excuse me my lens is made in Japan and does not have af and m button on the side . The autofocus works good with my Nikon D800 but not work on Nikon D5200. Please help can I have autofocus in D5200,? because D5200 doesn't have build in motor. And my sigma 20mm is different version than this lens you show.

nice review but i think ill pass on the lens 😅

Hi.

the price difference new is $200

I bought this lens for my 5D mark 1 and it didn't fit 🙄😭😭

I don't like Sigmas. Get real glas instead.