Pentax 20 - 40 mm Limited vs Sigma 18 - 35 mm Art Lens | Pentax KP | Fujifilm Xt-3
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- Опубликовано: 7 авг 2024
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Where I live there is a lot of rain, snow and sea. Bad weather is a good time to take pictures too, so in my opinion would be useful to mention that Pentax is weather sealed, while the Sigma Art it's not.
Very useful review anyway.
Thank you for your good job!
Thanks for this and your KP video today. The 20-40 is really lightweight. The 20mm end is slightly faster than the DA21mm Ltd., and my copy is sharper than my 21, so it replaces the 21 except for size. But, you get the zoom to 40, so it's a "bag of normal primes" in one lens, except for the drop-off in speed at 40. For travel, it can't be beat. Most of it is probably daylight shooting -- just be willing to use a table top tripod for evening work. The 15mm Ltd, the 20-40, and the 70mm ltd. are a great travel bag. Or if you can handle more, the 15, 20-40, and the DA* 50-135mm are even better.
Exactly! Its a lens full of primes in it. Very compact and light weight. It is amazing how well it held up vs sigma and fuji lens.
I recently got the 20-40 and my take is that it's a good "fit" with the kind of photography that made me settle on Pentax after using Nikons a lot in the past - unobtrusive street and travel photography - an approach that the Sigma is just too big and heavy to be considered for. Subjectively, I think the 20-40 renders colors very nicely, is reasonably small, and the HD coating pulls out some complexly lit photos that otherwise probably wouldn't work. That said, I feel like the limited series prime Pentax lenses I have generally take nicer images.
Peter Frank,you go sir! that is excellent!
Ive got the 20-40 pent and it's a wonderful lens.
Nicely built and light.
I take it most places alongside my 300mm prime in one over shoulder camera bag on the bike.
I mostly shoot birds or surfers but occasionally a landscape calls for a wider lens!
Yea the 20-40 is very nice compact sharp lens.
You are the best lens reviewer on YT.
Thanks Michael!
I am using the Sigma 18-35 on my K-3 quite a lot in low ligh situations (I habe just neem out on the Berlin Festival of lights last night), andf I love it! You are getting pin-point sharp images, and they also look great, from the lok and feel of the lens. And the Zoom makes it more versatile compared to the 30mm Art or the 35mm Art. It also works on the Pentax K-S1 with the same image quality (I had Pros not believing that I shot some great pictures with the Pentax beginner's camera). Only thing I can't recommend the 18-35 is Astro, as it has coma issues that the 30mm doe mot have.
Again, great review, and I think I cose the right lens for me.
Great information right there! I use the 18-35 for video mostly. I tried photo on it a few times but I saw my self grabbing something smaller when I shoot on the city streets. Though, if I was to do portraits, I grab the 18-35 because Im a bokah guy haha.
In some cases I think what you mean by sharpness (in the back ground against the sun for example) is contrast or lack thereof. Also how is focus breathing related to sharpness? Presumably you'd focus after you zoom.
You dont give me those mushrooms. Now you ask me such a question. Our relationship has changed over time I see 😂😂🤦♂️🤦♂️
My brother has the Sigma for F-Mount. It's a dream of a lens spare it's weight and size. Another point (for me, as I'm used to manual focus lenses on my Pentax) is the missing comfort when focussing manually.
With auto focus it works great.
yup I will agree!
Thank's for this comparaison
You are very welcome
Thanks for the vid, but are you testing the lenses on different camera bodies? How is that an apples to apples comparison?
This one wasnt really apples to apples like my others. This was an one off due to request.
Interresting test, thanks! On my side, I tested 3 copies of the sigma, and 2 copies of the pentax and my lenses do not exhibits the same behaviors as yours... The best of the 3 Sigma was outstanding at 35mm, excellent at 28mm, very good at 24, but not good at 18mm (too much CA on the sides at all apertures). The 3 sigma was poor at f/11 and unusable at f/16. The 3 sigma has A LOT a focus issue on my Pentax K-3II. The two 20-40 that I tested were not as sharp as yours. They were usable at 20mm, but not usable at 40mm because of field curvature issue, over my 500 tests photo, only two have edges in focus at 40mm :( The 498 others are not usable (for landscape shots) as edges were always out of focus. In regards to sharpness, my two 20-40 I tested were not impressive at all, and they were far far behind the Sigma, even in the center. Conclusion, it's really a pain to find a good copy of a lens these days! :( So much disappointment... Now I am waiting for the new version of the Pentax 16-50 that is expected for 2021 with all my fingers crossed!
Yup, all the new Pentax Lens coming for the crop sensor should be a generation change. Should be.,.. Lets hope! but yea Pentax need to update their lens quick.
The more aperture the bigger the lens?
My 25mm Voigtlander F/0.95 MFT is pretty small
Jay Freeman 50 mm F2 FF basically which in manual lens day pretty compact. With the sensor its x2 crop and 1 focal range.. .. ?
@@theCameraVille 2x crop at 50mm but still F0.95 ...no?
I hope this lens works well on my K3 mki. :)
Just got back to using my pentax after getting burned out using my fuji with manual vintage lenses. :)
Enjoy!
@@theCameraVille Thank You! :)
The Pentax photos look generally brighter at all apertures. I was thinking it is either a difference in t-stop values of the lenses, or a difference in ISO calculation and sensitivity on the individual camera bodies.
good evaluation~!
I love this Sigma lens. This was one of my first expensive lenses, my first zoom lens and I still use it several times in a month for low light. Even for Astrophotography it's a very good lens. And if you have bad focus issues you can adjust it with the docking Station for Art lenses. I often used my sigma for pictures of my Kids as they were babies. Low noise quick af, super sharp and very nice bokeh in low light. All I need. And don't forget its a zoom lens with f1.8. Incredible! Absolutely recommended. Both lenses have different uses. In my eyes the Pentax 20-40 is for day light and the Sigma for low light and Astro. I already have a day light lens gallery and a low light lens gallery for landscape, because sharpness is much more interesting than bokeh here.
Right on the money Rene! You got it locked down on that one. Depends what poison you want. low light, I am bringing the sigma. Day light, 20-40 lets do this! . Yea I have the canon version for the sigma so been getting lucky with the AF it seems.
Li, try doing some viltrox lens for review.. nice with ur xt30 🙈🙈🙈
Hariz Rahaman wait... you into fuji?
@@theCameraVille maybe... if im going to mirrorless i need to be careful about the battery, lens n so on. Now im survey xt20 with vitrox 23 f1.4 or fuji 23 f2
Nice video and thank you for sharing the results of your test, but sadly this one shows the limitation of your concept (giving an opinion purely based on head to head picture comparison and not introducing subjective experience).
I do own a sigma 18-35 in K mount and I used it a lot with my KP. At the beginning I also had a Pentax 18-270 (my starting lens) that I sold because of the sharpness and picture quality of the sigma (and the fact that the 18-270 has so much focus breathing that it can't do any job at it's long end beside landscape photography). But in practice the sigma 18-35 has so much drawbacks that I bought, once again, another standard zoom from pentax (this time the 16-85 which is a great lens for me).
The Sigma has great (if not the best) sharpness for its range. But also has some limitations that are important to know :
First, it's big and heavy which not only means that you gonna have a hard time carrying it (a long sling partly attached to the bottom of the camera and carrying it on one shoulder and not just around the neck almost overcome this problem) but also that people around you are going to notice you as a photographer. So don't expect to do any street photography (at least in Europe) with that thing because people will flee faster than if you'd showed up with a real bazooka, and other people will come to you with their phone so you can take a picture of them and expect good results even so it's just a damn phone that you don't even know how it works...
Second, your test doesn't address the focusing problem of the sigma 18-35 on the Pentax body when using the OVF. I doubt its only my copy of the lens because I also read that on comments on pentaxforum but the auto-focus is notoriously unreliable, and not just shifted (so you can correct it in the camera and it's good to go), but also unreliable in its unreliability so you can't correct it. So much that I almost never use it wide open (mostly at F8 or F4 if not sunny) and I took the habit to first focus in live view and then shift to the OVF once focusing is done when I want to shoot at wide aperture.
Last, the ergonomics of the sigma 18-35 is far from optimal to me. Mostly because the focusing ring is at the front of the lens and covered by the lens hood went mounted backward. You just can't manually adjust the focus with the hood in that position and the lens is even bulkier with the hood on (and people will behave like you have replaced your bazooka with a soviet tank). So at the end you either leave the hood on and the camera out of your bag or just leave the hood in your bag and never screwed to the lens (which some time results in you forgetting not having the hood on when you take a picture outside nearly in front of the sun...). The Sigma lens also lacks the WR of some Pentax lenses (such as the 20-40 or 16-85) despite being an internal focusing zoom and the paint on the plasticy barrel seems easy to scratch.
Other than that, the Sigma is the a very good lens that is gonna get you straight to the pixel-peeping passion (Wait ! Is that a good point?).
Very interesting comment, and I know a semi pro photographer who actually gave up on this lens, citing almost exactly the same reasons as you do here, although he was using it in a Fuji. He loved the image quality for the most part, so he really tried to calibrate it over and over until it nearly drove him crazy. I know another guy, a Canon user, who found it so unreliable he sent it back after just a couple of months (it just didn't play nice with his 80D). It doesn't seem that everyone has the same issues though (or perhaps they just don't notice).
I'm pretty sure from the test shots in this video that the focus is quite a bit off here, and not consistently so. I see front focus mainly when the subject is further away, but also some back focus in other shots, what's the subject of closer (maybe I need to watch again to confirm).
I've also seen issues with the bokeh quality, where for closer subjects, the background blur looks great, but for ones a bit further away, it looks busy or even "lumpy" (which is even worse, to my eye).
All in all, while I was sure I'd buy this lens after seeing the first reviews and sample images when it came out, once I'd seen long term reviews, and had read about it on forums and especially after having talked to those people I knew who owned it, I decided it was probably not for me.
As a used lens, at the right price, maybe so - knowing its limitations - because it's got some great strengths, and it seems that you can create some truly wonderful images with it.
Yup Vincent, as mentioned in the video, Its a bulky lens. I rather just take 20-40 over the 18-35 for a photo day but professional work I would just bare with the weight since I want the bokah!.
As for the 18-35, there is no AF issue on my end. There is a reason why I didn't own it for the Pentax. I got the canon version, and works excellent on my Fuji through an adapter. Flawlessly. No Af problems. Snappy as heck. Never lost focus. I think it has to do with the constant firmware updates they work on the Canon version specifically. I doubt they are even updating firmware's on Pentax version.
Yup, I understand about the lens hood issue. Many other lens have this issue and that's just a design that's difficult to fix. I Personally just leave the hood on and try to remember to bring it for the ride.
cheers!
@@theCameraVille I guess there are always good and bad copies out there, but it's Canon users who seem to have been most affected by these AF issues (so it seems, perhaps because there are way more Canon users, period), but it seems that if you do get a good copy of this lens, it's a keeper :)
Andrew Sowerby I also take really good care of my gear. I even got a custom sleeve cushion for my sigma lens. With that in mind, sigma lens arent durable.
@the CameraVille @Andrew Sowerby
Thanks for your replies.
I’m not a professional photographer and I have not pretension to become one but, to me, this lens is a keeper despite all its flaws.
The sigma simply is a combination of all the primes you wanna get (and that you can have) between 18mm to 35mm for an aps-c for the price of a single prime (except for some plasticy 35mm f1,8 that are some times quite cheap). The quality of the glass is on pair with most primes and even if it’s less sharp at f1,8 than at F4, it really allows for good old subject separation through bokah. I have also experienced the yellowish tone when the sun (or a reflection of it) is in the frame but it doesn’t bother me at all. To me, it give just a mood to the scene and you have to play with it to get a great picture.
To me, this lens has been nothing less than a revelation of how good the 24Mp AA filterless sensor of the KP truly is. It has been my kit lens for quite some time along side the 43mm f1,9 and the 100 macro. But for that you have to overcome its flaws.
Once you have taken the habit to spend your time using the live view, and sometime a combination of the contrast high-lighting function and the cropped live-view (sorry if those names are not accurate, my camera is in french…), you can reach the stellar results that you aimed for. But if you want a point and shoot, easy to use or discreet combo (each separate or all together) , just walk away from this lens, the sigma is just not for you...
If you use the sunshade that comes with the sigma the sun rays won't be there . I don't have the 20-40 but I bet the front lens is smaller so its not reflecting as much light as the sigma .Try your test again and this time use the included sun shade properly and see what happens .
I don't use it in any of my test because I want to see the lens design/tech. That is a crutch for many lens out there.
... and it's a shame that Sigma has stopped production for the Pentax-K version :-(
why? nobody buys Pentax. Their purpose is to sell, not to go bankrupt.
Actually correction, nobody means 0 people. I am sure folks that own Pentax system are buying the lens.
@@clopotari147 Pentax is in great financial shape...Sigma is vanishing.
The Sigma is a nice lens I do have 16-50 DA * f2.8 from pentax but buying an even bigger lens with small zoom range makes it really hard to use. This is why I bought 30 mm f1.4 art . Way smaller and easy to use.
nice! yup 16-50 is nice🙏
@@theCameraVille I wish if you have a review for the 55-300 PLM lens.
I'm Fujifilm shooter (XT1 & XT30)
I've got a used Pentax KP + battery grip + kit lens 18-55 WR in excellent condition just like BNIB for 510$ (USD).
After buying these, I realize that Pentax lenses are relatively expensive compared to Fuji and I cant get 16mm f1.4, 56mm f1.2, or 35mm f1.4 lens like Fuji has. What Pentax lenses you recommend for landscape/vlogging (wide), portrait, & street photography?
Im more of a Full Frame shooter with Pentax but for Apsc, 11-18 * glass lens and for portrait they have plenty of options actually.
Pixel peeping aside the Sigma is A POUND HEAVIER. For walking around it makes a hell of a difference.
very true!
The Pentax wins on size alone but the Sigma holds it's own. Nice! Neither are better, they are different. Both I would like to own.
Michael Russo 😂😂🤦♂️🤦♂️🤦♂️
@@theCameraVille too many elements in the sigma...lazy solution vs Pentax superior design and glass.
Just sold my 18-35...The image quality of sigma is amazing, but it is too heavy to be taken out daily.😂
Yea its pretty heavy. I know what you mean
I had no idea the size difference between it and the Pentax 20-40 until I saw this video.
it seems that all the fault is of the lens. I would like to see how the sigma lens works with the pentax camera.
Its terrible . Sigma doesn't support Pentax anymore. Sigma has been still updating the canon firmware which is what I have. Even 2020 Sigma still release firmware for Canon. So new Apsc bodies for Pentax wont get the support so expect tons of bad already AF.
That Pentax is what I want boi but I can tell you now Cannon kills all of these hands down baby 🤣🤣🤣
A Canon-Fanboy who doesn't know how to write Can(n)on :-)
bahahaha, welp opinions are opinions haha.
Lighter and more affordable is the best ....
Yup, the lightness of the 20-40 is pretty nice.
That Pentax 20-40 is WR too. I personally wasn't very impressed with the Sigma.
Pentax is WR yup. The flaring on the sigma seemed a bit wild.
Looking at the images people get with that Sigma, it seems that if you know its limitations, and play to its strengths, you'll get stunning results. This test was good though, because it showed up all the flaws (of both lenses). Anyone buying them after watching this video can do so with their eyes open ;)
I think I want both of them now 😂😂
:)) 18-35 is my daily lens.
You got muscles. hehe.
@@theCameraVille I'm quite the opposite :)) but I really like this lens and it is worth the effort.
Good video! Keep up the good work!
Radu Sansebes Yea, Im forcing myself to use it more for photo. Im going to get buff hehe. Its a great lens. Its a classic !
Ставлю лайк.
That Sigma falls apart badly against the light. That’s unusable.
Yea, very flary . I was a bit stunned since the elements in sigma was stacked.
Before I watch... I'm predicting the Sigma will "win" on image quality.
Well, after watching, I was surprised. The red flare and slight CA issues on the Pentax at wider apertures wasn't a surprise, but the lower corner sharpness and strange background rendering on the Sigma was. The image quality of the Sigma when stopped down to f/11 or higher was pretty shocking. I'd expect better for the money, although it was a pretty difficult scene. The green/yellow colour cast was weird, but that's probably easily corrected.
Edge sharpness was really good on the Pentax, as I've heard. Good to see that confirmed. Maybe that balances off any focus breathing issue ;)
In the centre sharpness test, the Sigma seemed to be producing inconsistent results. Could this be the famed AF issue? I know people who went nuts trying to calibrate theirs, and one who gave up and just sold it.
@@tubularificationed if you read my comment, this is what I thought might be the issue. I've heard of, read about, and know a couple of people who struggled with AF issues with this lens.
Unless you're suggesting this is pure user error, and I assume you're not
Edit: lol, now I read YOUR comment properly, I see exactly what you're saying. And yeah, this is what my friend, who owned this lens thought too.
I've had lenses I just couldn't seem to calibrate well enough for focusing through the OVF, and without a tilt screen, that made them not a lot of fun to use for general shooting, but I guess this lens is really too bulky for that anyway.
lol!.. I thought the same but that 20-40 have some magic left
@@tubularificationed for Canon they had trouble reverse engineering the AF for some models, apparently, and I read that they weren't able to get it to work with live view on the 80D at all (maybe fixed by now though, lol)
@@tubularificationed I think it might be a lot to ask for any lens manufacturer to rev. engineer Canon's later, very sophisticated PDAF systems, like those in 80D, 90D, M6II, 5DIV and so on. I imagine it's a real challenge.