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Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread

tsdevine
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p.11 #1 · p.11 #1 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread

Yeah, both great lenses. The shorter range of the Sigma probably let's it eke out some advantages. The lack of fringing/CA reminds me of my CVs...which is nice.

The Tamron obviously covers a much larger range. My love of 28mm though tilts me back to the Sigma.

Agree about the warmth. At least Sigma is fairly consistent that way, so you can correct it once you get a feel for it.

Thanks for posting these by the way, I really enjoy the mix of shots and comparisons. I really think it can help people get a feel about how the lenses performs.

ryanli wrote:
Based on my comparisons, the Samyang puts up a good (actually I'd say great) performance at both 35mm and 45mm, but the Sigma does have a noticeable if slight edge in terms of contrast. The Samyang definitely has more nervous looking OOF areas and ever so slight double-lining, and the Sigma noticeably but again slightly cleaner in terms of OOF rendering. Samyang has noticeable but slight colour fringing around highlights which is non-existent in the Sigma, but Sigma has the trademark warm cast.

What does this tell us? Probably not very much. other than that the Sigma is even better than...Show more →

Sep 06, 2024 at 08:00 PM

philip_pj
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p.11 #2 · p.11 #2 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread

35mm: To judge depth, ask yourself the simple question 'would I like to walk into this frame?' So the Samyang moves faster into blur here. Sigma shows greater depth in the nearby berries, less green lining in stalks.
45mm: unpleasant cyan fringing in sky crop of Sam lens, persists in later crops. Blue greens not great. Purplish overlay on Sam strawberry crop.

You'll see greater effects at f2.8-f4-f5.6 and a range of focus distances. A wider range of colours would help too (I suspect better tonality) and more content on the focal plane from longer focus distances, here looks quite near to MFD, maybe one metre? Both do well here, overall, these super complex zooms (the Sam is 21/18) are improving rapidly. But more contrast, less outlining, less CA to the Sigma.

Sep 06, 2024 at 08:55 PM

tsdevine
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p.11 #3 · p.11 #3 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread

Gratuitous bench shot

Sep 16, 2024 at 05:26 PM

RatX2
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p.11 #4 · p.11 #4 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread

As a follow up to my earlier post, this is the only lens I took on a trip to Chicago. Enjoyed having my most-used FL in one lens and the ability to shoot in low light - simplified things greatly. I didn’t find the lens too heavy or big (personal preference) while carrying in a small ThinkTank shoulder bag. Only negative was rare missed focus @ 1.8 between 40-45. I have seen excellent images taken @ 1.8 in this thread so not sure what is going on. Probably user error.

Sep 16, 2024 at 07:01 PM

tsdevine
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p.11 #5 · p.11 #5 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread

What camera are you shooting? So far it seems very reliable on my a7R V, at least in my shooting. But I don't shoot all that much in low light.

RatX2 wrote:
As a follow up to my earlier post, this is the only lens I took on a trip to Chicago. Enjoyed having my most-used FL in one lens and the ability to shoot in low light - simplified things greatly. I didn’t find the lens too heavy or big (personal preference) while carrying in a small ThinkTank shoulder bag. Only negative was rare missed focus @ 1.8 between 40-45. I have seen excellent images taken @ 1.8 in this thread so not sure what is going on. Probably user error.

Sep 16, 2024 at 07:04 PM

RatX2
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p.11 #6 · p.11 #6 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread

Sony A7R V. It’s rare and not enough of an issue that I would hesitate to use the lens.

Sep 17, 2024 at 05:56 AM

ryanli
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p.11 #7 · p.11 #7 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread

As previously promised, here are some comparisons of the 28-45/1.8 against the Sony 24/1.4 GM. This comparison makes sense for me because one of my motivations for buying the 24 GM, as one of my first Sony E mount lenses back in the day, was to replicate the DSLR Sigma 24-35/2 experience in a much lighter package with native AF (with APS-C crop mode, the 24 GM becomes an effective 36/2.1). And whilst I personally prefer the 24mm FOV to 28mm, I would class the 24/1.4 and the wide end of the 28-45/1.8 both as "fast wides" with similar use cases.

All shots taken using A7C II on tripod, silent shutter, point AF, best of 3 shots using self-timer. Sigma on the left, Sony on the right.

Sigma 28-45/1.8 @ 28mm, F/1.8 (left) vs Sony 24 GM @ 24mm, F.1.4 (right)
Apologies for the slight difference in the plane of focus, I had tried to focus on the orange ball but the 24 GM appeared to focus slightly in front of it. Still, the differences look quite obvious to me:

The Sigma renders the in-focus areas with biting sharpness and crispness, whilst the Sony just doesn't quite achieve that level of detail or contrast. As for out-of-focus areas, the Sony suffers horribly from LoCA which really detracts from what I would consider otherwise consider as generally pleasant, if at times nervous rendering. Sigma's bokeh has a touch more outlining but otherwise looks even, well-controlled, with less cat's eyes towards the edges/corners - overall a more pleasant painterly look.

Fit to frame

100% crop - orange ball

100% crop - foliage detail

100% crop - fence bokeh

100% crop - tree bokeh

I also compared the Sigma wide open against the Sony stopped down by 1 stop to F/2; amazingly, the Sony only then just about matches the Sigma for sharpness but is still surpassed by the zoom in terms of microcontrast/crispness. Also stopping down doesn't fix the LoCA on the Sony, so the bokeh looks even worse.

Sigma 28-45/1.8 @ 36mm, F/1.8 (left) vs Sony 24 GM in APS-C mode @ 36mm equiv., F.1.4 (right)
For fun I tried to replicate my Sigma 24-35 use case on my A7C II with the help of APS-C crop mode. For the magnified crops, the Sony are at 100% crop whilst the Sigma have been zoomed down to 67% to match image size. The superior sharpness of the Sigma is a given considering both the higher pixel count in FF mode and what we have already seen of the Sigma at 24mm. However, I'd say at 36mm the Sigma renders OOF more harshly with more definite outlining both in comparison to its own wide end and to the Sony GM; this is quite obvious in the tree and windmill crops.

Fit to frame

Crop - orange ball

Crop - foliage detail

Crop - windmill bokeh

Crop - fence bokeh

Crop - tree bokeh

In conclusion, another very impressive performance from the Sigma with prime-beating sharpness, contrast, and LoCA; and comparatively clean OOF rendering at 28mm vs the Sony 24 GM. I think my 24 GM will be going on eBay soon! I did prefer the Sigma's OOF rendering at 28mm than at 36mm; unfortunately, I don't have a 35/1.4 GM or Sigma 35/1.2 or 1.4 to compare it against so I'd be interested to hear others' experiences.

Sep 17, 2024 at 09:57 AM

Knut.
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p.11 #8 · p.11 #8 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread

Thank you Tim for this great introduction to the Sigma 28-45. I would not have become aware of this lens without your posts.

I really find this decision difficult:
- I hate a lot of weight dangling from my neck when hiking. Such a huge lens is thus a no-go on many trips. (Also when exploring a new city).
- But there are situations when you want to maximize image quality and you can either not step back / step forward to get the image frame you want due to space restrictions or
- you cannot get the exact frame you want, due to the fact that what you want to shoot is at infinity and thus limits framing (landscapes are an example).

In these cases a zoom is beneficial.

Sep 17, 2024 at 10:25 AM

tsdevine
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p.11 #9 · p.11 #9 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread

Definitely understand how shooting style comes into play here. When I'm hiking, my camera is stowed....sure, that means I have to get the camera out when I have to shoot, but that's how I shoot. I can definitely understand for those who like to have the camera ready at all times, that size and weight are a bigger deal. If it doesn't work, it doesn't work.

When I'm just casually walking around (not hiking), I have a strap that allows the camera to point downwards, so the lens is pointing to the ground. There is weight obviously, but it hasn't bothered me too much. Looks like iShoot has an existing tripod ring/foot that can work with this lens, but I haven't up to this point felt that the lens is going to cause camera mount issues.

Really important to understand that what does and doesn't work for one person....is just reality, no one is "wrong". We all kind of make compromises on equipment, preferences, etc. But we all have our own take on the compromises we are willing to make.

Knut. wrote:
Thank you Tim for this great introduction to the Sigma 28-45. I would not have become aware of this lens without your posts.

I really find this decision difficult:
- I hate a lot of weight dangling from my neck when hiking. Such a huge lens is thus a no-go on many trips. (Also when exploring a new city).
- But there are situations when you want to maximize image quality and you can either not step back / step forward to get the image frame you want due to space restrictions or
- you cannot get the exact frame you want, due...Show more →

Sep 17, 2024 at 10:38 AM

tsdevine
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p.11 #10 · p.11 #10 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread

And thank you for the thanks! Even if it doesn’t work for you, it always nice to know threads like this are worthwhile.

Knut. wrote:
Thank you Tim for this great introduction to the Sigma 28-45. I would not have become aware of this lens without your posts.

I really find this decision difficult:
- I hate a lot of weight dangling from my neck when hiking. Such a huge lens is thus a no-go on many trips. (Also when exploring a new city).
- But there are situations when you want to maximize image quality and you can either not step back / step forward to get the image frame you want due to space restrictions or
- you cannot get the exact frame you want, due...Show more →

Sep 17, 2024 at 10:55 AM

Knut.
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p.11 #11 · p.11 #11 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread

tsdevine wrote:
And thank you for the thanks! Even if it doesn’t work for you, it always nice to know threads like this are worthwhile.

I cannot say that it doesn’t work for me: I’m on my way building a use case for this lens.
😉

Sep 17, 2024 at 11:02 AM

Knut.
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p.11 #12 · p.11 #12 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread

j4nu wrote:
The thing is, there is no 1.4 prime you can crop to 45mm and get the same level of detail as this zoom at 45mm. The closest would probably be Sigma's own 28/1.4 but it's not much lighter/smaller than the zoom. Of course, this only matters if you really care about IQ, but I don't think anyone who doesn't buys this zoom...

Sigmas discontinued 40mm/f1.4?

Sep 17, 2024 at 11:23 AM

tsdevine
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p.11 #13 · p.11 #13 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread

APO vs APO?

Left is Voigtlander 35/2 APO and the right is the Sigma. This is zoomed to 300% on a retina display, so probably a little nit picky. The CV 35 is a great lens.

One of these lenses is an APO lens, the other isn't. (I guess there is always a little fudge in many APO designations.)

Edited on Sep 17, 2024 at 03:01 PM · View previous versions

Sep 17, 2024 at 02:42 PM

tsdevine
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p.11 #14 · p.11 #14 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread

The 28-45 competes well with my 40/1.4 wide open, but the 40/1.4 does pull away as you stop down. At least my copies.

Knut. wrote:
Sigmas discontinued 40mm/f1.4?

Sep 17, 2024 at 02:46 PM

steamtrain
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p.11 #15 · p.11 #15 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread

tsdevine wrote:
The 28-45 competes well with my 40/1.4 wide open, but the 40/1.4 does pull away as you stop down. At least my copies.

I never see a difference in sharpness between the f/1.4 shots and stopped down shots from my 40mm Art. That's with the 45Mp of the Canon R5. I do see a slight difference between f/1.4 and f/2.0 with the 105mm Art, and even more so with the 28mm Art, but the 40mm? No. I never hesitate to shoot it wide open. The whole "pulling away as you stop down" thing is beyond perception for me.

Sep 17, 2024 at 03:27 PM

tsdevine
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p.11 #16 · p.11 #16 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread

So what I'm saying is that the 40/1.4, at least my copy, on a 60 MP sensor....sharpens up on the edges and corners as you stop down. My 28-45 doesn't improve as much on the edges and corners as you stop down.

If your lenses are perfect wide open at 1.4....and there is no improvement in sharpness and contrast anywhere on the frame as you stop down....and they are super sharp.....don't ever sell those lenses.

I'm not saying mine isn't sharp at 1.4.......it is. It goes from great to really great as you stop down.....or really great to really really great. It's not average or good wide open, it's great. I'm viewing at like 300%, I'm not sure I could discern a difference in normal viewing.

Arguably were looking at some of the best optics available. Everything has a starting point of great on theses lenses.

Hopefully I'm making sense here, unless I misunderstood the disconnect.

steamtrain wrote:
I never see a difference in sharpness between the f/1.4 shots and stopped down shots from my 40mm Art. That's with the 45Mp of the Canon R5. I do see a slight difference between f/1.4 and f/2.0 with the 105mm Art, and even more so with the 28mm Art, but the 40mm? No. I never hesitate to shoot it wide open. The whole "pulling away as you stop down" thing is beyond perception for me.

Sep 17, 2024 at 03:32 PM

j4nu
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p.11 #17 · p.11 #17 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread

Knut. wrote:
Sigmas discontinued 40mm/f1.4?

Really?! That's news to me...

Sep 17, 2024 at 03:39 PM

tsdevine
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p.11 #18 · p.11 #18 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread

https://www.sigma-global.com/en/lenses/discontinued/

j4nu wrote:
Really?! That's news to me...

Sep 17, 2024 at 03:42 PM

j4nu
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p.11 #19 · p.11 #19 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread

ryanli wrote:
As previously promised, here are some comparisons of the 28-45/1.8 against the Sony 24/1.4 GM. This comparison makes sense for me because one of my motivations for buying the 24 GM, as one of my first Sony E mount lenses back in the day, was to replicate the DSLR Sigma 24-35/2 experience in a much lighter package with native AF (with APS-C crop mode, the 24 GM becomes an effective 36/2.1). And whilst I personally prefer the 24mm FOV to 28mm, I would class the 24/1.4 and the wide end of the 28-45/1.8 both as "fast wides" with similar use...Show more →

Yes, bokeh definitely gets crunchy around 35mm. I have a comparison shot at 28/35/45 and it seems smoother on both the wide and the long end (shot from the same distance though).

Sep 17, 2024 at 03:50 PM

j4nu
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p.11 #20 · p.11 #20 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread

tsdevine wrote:
https://www.sigma-global.com/en/lenses/discontinued/

Thanks, didn't know that!
I'm not sure how this is related to my comment about cropping a wide fast prime to 45/1.8 equivalent but it's good to know nevertheless.

Sep 17, 2024 at 03:53 PM

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