Camera: Daylight Evaluation: Far Sight

Naturally, the proof is in the pudding, and that’s where we’ll fully evaluate the S20 Ultras as well as the S20+. Last year we saw some larger camera quality differences between the Exynos and Snapdragon variants of the S10+; these differences slowly disappeared over the course of the year over numerous software updates, but there still remained some discrepancies here and there in terms of the software processing. This year, we’ll be putting the two S20 Ultras against each other in the same manner, and we also have the Exynos S20+ to check how that camera configuration compares.

I’ve noted that over the past years maybe I hadn’t been objective enough when it came to colour accuracy of the photo evaluations, so starting with the review today I want to do something else and add in another comparison point. The Fujifilm X-T30 with the standard 18-55mm kit lens will serve as a “reference” point in terms of the exposure and in particular the colour accuracy of the scenes – I particularly chose the Fuji because it had been praised as being amongst the best in the industry in this regard. The samples here are adjusted in terms of their exposure and dynamic range, but without any modification to the colour science.

Click for full image
[ Galaxy S20U - (S) ]
[ Galaxy S20U - (E) ]
[ Galaxy S20+ (E) ]
[ S10+ (S) ] - [ S10+ (E) ]
[ iPhone 11 Pro ] - [ Pixel 4 ]
[ Mate 30 Pro ] - [ P30 Pro ]
[ X-T30 ]

Diving right into the matter, let’s talk about the S20 Ultra’s zooming ability. Samsung here advertises up to 100x magnification, and I’ll pretty much discard this mode right out of the gate as being useless and a mere marketing gimmick. There’s essentially little to no advantage over a 30x magnification on the phone and it doesn’t even warrant samples as it just looks like a mess and no different than just magnifying the 30x shots digitally.

So, taking the 30x shots as the first comparison point, there’s only three phones in the line-up actually capable of such captures. Between the two S20 Ultra phones are very similar to each other, but there’s slight differences in terms of how they’re handling noise and sharpening. The Snapdragon unit has a bit more sharpening going for it but it’s hard to pick it as being outright superior. The S20+ is the only other phone capable to such magnification, and the difference to the S20 Ultras is quite large as there’s evidently a ton more pixilation and nowhere near the same spatial resolution – but that was to be expected.

At 10x magnification we again see the two S20 Ultra shots being similar in exposure, however there’s again differences in the detail. Here it’s more evident that the Snapdragon unit is using post-processed sharpening to the image, and there also appears to be some smearing of details as the Exynos unit does achieve to maintain some better textures on some elements.

Huawei’s P30 Pro and its own periscope telephoto module is the only unit that comes into play here as a competitor in terms of sharpness, but the S20 Ultras still beat it handily. The S20+ produces a useable result, but also lags behind the S20 Ultras – but is still far ahead of any other “conventional” zoom camera, with only the Pixel 4 competing in terms of result.

At 4x magnification which is the native level of the S20 Ultras, we again see the differences between the Snapdragon and Exynos units just pop right out at you, as the former’s sharpening is evident throughout the scene.

The S20+’s 3x result is the phone’s default mode when you tap on the telephoto zoom button when switching cameras, and the result does look respectable and is significantly more detailed than what you’d see from other 2-3x optical zoom modules, although the Mate 30 Pro’s 3x optics are much sharper, even if the sensor itself has some dynamic range issues.

At a 2x magnification, that’s where we see the S20 Ultra’s biggest weakness and problems. Samsung here is employing image fusion between the main and telephoto modules, using the sharper center image output of the telephoto module and merge it into the wider capture of the main unit. The problem here is that they’re doing this while the main module is at 12MP resolution, and the result is that the majority of the image looks like a pixelated mess as it has to do digital magnification on that 12MP image. It’s a massive disappointment and it’s here where the S20+’s dual-wide angle camera system comes to shine, as the 2x results is leaps and bounds better than on the S20 Ultras.

Not only are both S20 Ultras blurry here, but the Snapdragon S20 Ultra here goes haywire with the sharpening and the foreground vegetation is ridiculously over-processed, as if suffering from high image compression.

Click for full image
[ Galaxy S20U - (S) ]
[ Galaxy S20U - (E) ]
[ Galaxy S20+ (E) ]
[ Galaxy S10+ (S) ] - [ Galaxy S10+ (E) ]
[ iPhone 11 Pro ] - [ Pixel 4 ]
[ Mate 30 Pro ] - [ P30 Pro ]
[ X-T30 ]

In the next scene, again we see the two S20 Ultras dominate in terms of their sharpness and what they’re able to achieve, being far ahead of any other phone in terms of the achieved resolving power at high magnification.

The two Ultras again showcase big troubles at 2x magnification and are handily beat by every other phone in the line-up, even losing to last year’s S10.

Between the Snapdragon and Exynos S20U’s, the Qualcomm variant continues to showcase more post-processed sharpening throughout the scene on all camera modules. On both wide and ultra-wide shots, we see the Exynos able to retain better definition of textures in the brighter elements on the scene such as on the small and big concrete towers.

Click for full image
[ Galaxy S20U - (S) ]
[ Galaxy S20U - (E) ]
[ Galaxy S20+ (E) ]
[ Galaxy S10+ (S) ] - [ Galaxy S10+ (E) ]
[ iPhone 11 Pro ] - [ Pixel 4 ]
[ Mate 30 Pro ] - [ P30 Pro ]
[ X-T30 ]

The S20 Ultra’s telephotos are again quite incredible for a phone – far ahead of any other phone and handily beating my X-T30 on the regular kit lens. While the Snapdragon does pop out more and has more contrast in the details, it’s quite exaggerated and doesn’t feel as natural as the unsharpened results of the Exynos S20U.

On the main and ultra-wide, these differences continue. Vegetation might look more pronounced on the Snapdragon, but it loses out in texture retention to the Exynos throughout the scene.

This scene for some reason was very wrongly exposed on almost all the phones, with all of them getting a failing mark in that regard. Even though it’s in broad daylight, the S20 results barely have any elements in the upper 10-15% of the histogram in terms of exposure levels, the X-T30 better represents the scene as it was in reality.

Click for full image
[ Galaxy S20U - (S) ]
[ Galaxy S20U - (E) ]
[ Galaxy S20+ (E) ]
[ Galaxy S10+ (S) ] - [ Galaxy S10+ (E) ]
[ iPhone 11 Pro ] - [ Pixel 4 ]
[ Mate 30 Pro ] - [ P30 Pro ]
[ X-T30 ]

In the next shot there’s some issues that start arising for the S20+’s “telephoto” module, and that’s the optics. In this scene with an extremely bright backdrop against the sun with very high contrast due to the trees, we see very a very prominent haze around the high contrast elements. It’s as if the phone had a smudged lens, but it was actually clean. I noticed this happens in quite a for scenes for the S20+ and the only explanation I have is that it’s an optics issue with the lenses of this module.

This is also a good scene to start talking about the 108MP capture modes of the S20 Ultras. There’s a massive amount of detail here and these particular samples are around 50MB in size, as a warning before you open them.

Both phones are able to capture significantly more detail than in their default 12MP modes, however there a very stark differences between the Snapdragon and Exynos phones, with the latter being able to produce a much higher quality result with far more natural detail. I don’t know exactly what’s happening here, but it’s as if the Snapdragon picture was lower resolution and scaled up to 108MP, whereas the Exynos unit is closer to a native resolution shot.

Although there’s haze in parts of the shots, the 64MP shot of the S20+ here is doing a remarkable job in terms of keeping up with the 108MP cameras, and I’d even go so far to say that for large parts of the scene it’s actually able to resolve things with more spatial resolution than the S20 Ultra, particularly towards the edges of the scene where the Ultra just starts getting far too soft.

Click for full image
[ Galaxy S20U - (S) ]
[ Galaxy S20U - (E) ]
[ Galaxy S20+ (E) ]
[ Galaxy S10+ (S) ] - [ Galaxy S10+ (E) ]
[ iPhone 11 Pro ] - [ Pixel 4 ]
[ Mate 30 Pro ] - [ P30 Pro ]
[ X-T30 ]

This is another incredibly detail-rich scene, this time around with also more high dynamic range.

The S20 Ultras are quite different here in terms of their color renditions, with the Snapdragon being quite saturated. There’s also differences in exposure – although both phones were similar in their exposure time at 1/124 and 1/135th second, the Snapdragon chose ISO16 while the Exynos chose ISO50. There is some evident change in the HDR processing as the Exynos is able to better preserve the highlight of the sky and that part of the trees whereas it’s blown out on the Snapdragon.

The S20+ feels weird here on the main sensor as it produces a seemingly lower resolution image on the right side of the creek, with worse results than that of the S10 and other phones.

Click for full image
[ Galaxy S20U - (S) ]
[ Galaxy S20U - (E) ]
[ Galaxy S20+ (E) ]
[ Galaxy S10+ (S) ] - [ Galaxy S10+ (E) ]
[ iPhone 11 Pro ] - [ Pixel 4 ]
[ Mate 30 Pro ] - [ P30 Pro ]
[ X-T30 ]

The flower here is again a good example of the haze that’s present on the S20+’s 64MP lens module, again showing some weak optical characteristics.

When taking pictures of more close-up objects, the S20 Ultra’s huge sensor and shallower depth of field becomes more apparent as the background becomes significantly more out of focus and blurred out. The problem is that isn’t not so much a smooth bokeh more appears more as chromatic aberrations and quite a bit of a mess.

The phones are also having trouble with the exposure and HDR and highlights of the vegetation is far too bright, the Pixel 4 and iPhone 11 Pro are doing a much better job here.

Camera Architecture: Huge New Sensors Camera: Daylight Evaluation Continued
Comments Locked

137 Comments

View All Comments

  • MAGAover9000 - Tuesday, April 7, 2020 - link

    I have the s10+. Fantastic device. Very happy
  • id4andrei - Friday, April 3, 2020 - link

    No need for me to praise this review any longer. Still, I must nitpick. The 3dmark GPU test always has caveats in your reviews. Drop it if you feel it is detected by OEMs or it's a false GPU test like the physics one.

    On web tests. I read on wiki that JetStream is an Apple made test, literally. Wouldn't you say that's a big caveat when testing against ios? Similarly Speedometer is developed by the webkit team at Apple. With Android webview based on Blink, not webkit, wouldn't Android smartphones be at a disadvantage against iphones? I don't see Kraken(Firefox) or Octane(Google) being used.

    Kraken would actually be neutral to both. Other 3rd party tests might be Testdrive(Microsoft) or Basemark.
  • Andrei Frumusanu - Friday, April 3, 2020 - link

    I don't think that the fact that the WebKit team made those tests is a valid argument against using them. You can go and read the source JS yourself if you wish, and they're industry accepted benchmarks. Both Kraken and Octane are ancient and outdated and we dropped them just like we dropped SunSpider of the early days.
  • id4andrei - Friday, April 3, 2020 - link

    Thank you for the prompt answer.
  • s.yu - Friday, April 3, 2020 - link

    Thank you Andrei, again the most comprehensive and reliable set of samples anywhere!
    There seems to be considerable sample variation again (last time with Samsung was the main module since S9 with the variable aperture) in the UWA, S20+E and S20UE should have absolutely identical UWA performance but the S20UE seems to have far worse sagittal resolution than the S20+E, and Samsung's processing isn't that good in the first place, considering the 12MP 1.4μm could produce incredibly sharp pictures as that been the specs of the Pixels' main module for generations.
    I don't regret their switch to f/1.8 because the old module that went up to f/1.5 wasn't sharp wide open, especially in the corners, but a further two stops' variation to f/3.3 could be useful for more DoF in closeups provided inserting that physical aperture into the tiny module doesn't compromise the optical design otherwise.
    This time around the E seems to generally outperform the S, except in color as E doesn't seem to have proper color fidelity...almost as if chroma NR is set too high even in broad daylight, and the "hybridization" of the digital zoom, in which the E clearly uses a smaller portion from the periscope's readout than the S in the resulting merge. Speaking of the zoom, S20+ still performs slightly worse at 2x(16MP readout) than S10's native 12MP, though the difference is small and could be down to lens variation. Considering S10U's Z height, they could've easily fixed the S20U like Xiaomi, going 1/2.3" f/2 12MP with the 2x. Xiaomi used it despite a 4-1 bin, all the more reason to use it with a 9-1 bin. S20U's corner performance at 3x would also be much improved.
    Regarding the comparison with the Fuji though, I suspect your unit has trouble focusing to infinity correctly, because the train and forest samples show clear superiority of the Fuji's zoom. I especially recognize that kind of slight haziness as being very responsive to dehaze and low radius sharpening in LR and would result in far more detail with extraction in post. Also, with an ILC, there's always stopping down a little for more sharpness and more DoF.
    Regarding the full res modes, it's not worth storing 108MP of data with the CFA asking for a 9-1 bin, of course the 64MP would be better, without the RAW it's hard to say for sure, but the 64MP seems to be quad bayer.
  • s.yu - Friday, April 3, 2020 - link

    I don't agree with your remark about the night comparison with Mate30P though, the UWA is not "UW" so it has better image quality, that's true, and the night mode of the Mate30P is far superior, that's also true, but not auto mode, nor any aspect of the telephoto as it's clearly using a crop of the main for 3x. Samsung does attempt to use the 4x for telephoto and although there's a significant issue of chroma noise, it's far sharper than Mate30P's crop, with at least twice 3 times the effective resolution in night mode. With S20U you could also crop out a single shot 3-4x of similar brightness to the Mate30P crop, but it's just a crop.
    As for the potential of P40P surpassing S20U, that model operates on a 9.4MP crop by default, interpolated to 12.5MP which clearly has consequences. In daylight it's often a regression compared to P30P (much less match Mate30P), and in night shots using the current firmware it has severe color issues of rendering large portions of the scene as a crimson red, so it's hard to say at this point too.
  • s.yu - Friday, April 3, 2020 - link

    Oh, there's exception of the Mate30P auto mode in the last sample, but the night mode isn't constantly superior either.
  • RealBeast - Friday, April 3, 2020 - link

    I've been looking forward to getting one of these, not sure which yet. The fly in the ointment now is that I won't see my Mom (who gets my old S9+) until the Fall due to the whole COVID problem, not to mention less income. That will weigh heavily on sales of what is otherwise an amazing looking phone for me.
  • 29a - Friday, April 3, 2020 - link

    How large are the picture file sizes created by this thing?
  • BedfordTim - Sunday, April 5, 2020 - link

    The same size as any other 12MP camera. They will depend on content, hdr, motion and compression options but I would expect about 36MB for a raw image and 8MB for a high quality jpeg.

Log in

Don't have an account? Sign up now