Sony A7Rii and Sony/Zeiss 35mm F2.8 v Fuji X100V

Started Oct 27, 2020 | Discussions thread
SafariBob
SafariBob Senior Member • Posts: 2,634
Re: Sony A7Rii and Sony/Zeiss 35mm F2.8 v Fuji X100V

PWPhotography wrote:

SafariBob wrote:

PWPhotography wrote:

SafariBob wrote:

theoverratedphotog wrote:

PWPhotography wrote:

theoverratedphotog wrote:

PWPhotography wrote:

42mp A7r II with such lens destroys 26mp APS-C X100V easily, not that close.

FE 35/2.8 ZA is actually not among the sharpest prime lenses on E-mount, but still be much sharper than APS-C X100V with the fixed prime. The reason is very clear that the much smaller APS-C sensor has to enlarge pixels much more to project to the same size of output which is the same as digital cropping. As a matter of fact, 61mp A7r IV in APS-C mode (as cropped to 1.5x AOV) = 26mp APS-C sensor in resolution (and entire IQ).

Sharpness is more to do with lens than MP. I don't think you can make broad statement like this. A crap lens on a full-frame body is not better than a good lens on an APSC body.

That is misunderstanding by many including you. Sensor is the key part in the system sharpness. Bear in mind, neither lens alone nor senor can take photos but lens+sensor as a system. DXO lens+sensor tests proved what I said. Smaller APS-C sensor has to enlarge pixels much more that is the same as cropping that soften a photo in large degree. Otherwise some lenses on mFT, 1" or cellphone are excellent, as good as on APS-C in some eq FL lenses.

I have both the X100V and the 35 f/2.8 although I have the A7riii not the A7rii. I'll do some tests this weekend.

Waiting to see. Suggest on a concrete building as the sample I demo'ed and compared at the same size, ideally enlarge 26mp from X100V to the same 42mp as on A7r III/II

In theory, what you are saying is correct, but the impact is so small in the overall equation that it is negligible. Lens quality, ISO etc would have much bigger impacts. Looking at a 24MP on both APSC and full-frame with the same equivalent focal length and aperture, the images are almost indistinguishable.

Put a 56 f/1.2 on an APSC and the Sony 85mm f/1.8 and you'd be hard-pressed to identify the difference between the two. The test I saw with the Fuji 50-140 and the Canon 70-200 f/4 showed the Fuji was sharper which disproves exactly what you were saying.

https://www.instagram.com/theoverratedphotographer/
https://www.theoverratedphotographer.com/

There is some truth to this, but bear in mind that making a doubly sharp,1 stop faster lens seems to be very expensive for many classical lensdesigns. Hence I don’t think this really pans out - case in point your 56 1.2 is nearly twice the cost of the equivalent Sony.

I am tired of searching. But I have seen much cheaper FE 85/1.8 on 24mp A7 III is sharper than Fuji 56/1.2 on XT-2 or XT-3, no mention on 42mp A7r II/III. Again really cropping factor plays a big role here.

As a matter of fact, in my side by side test, the mighty Sony 135/1.8 GM on A7r IV in APS-C mode @f2.8 is about the same sharpness on supposedly (much) inferior zoom FE 70-200 GM @200mm/F2.8 wide open on A7r IV that roughly in about the same AOV. However after enlarging the former photo from 26mp back to 61mp, it shows clearly resolution loss and nosier in shadow area after lifting. Then FE 70-200 GM wins over after stopping down from f2.8 wide open that wins clearly at F5.6 for example, not only in resolution/sharpness but DR.

https://www.photonstophotos.net/Charts/PDR.htm#FujiFilm%20X-T2,Sony%20ILCE-7RM4,Sony%20ILCE-7RM4(APS-C)

Very clearly in above link, the 61mp A7r IV in APS-C mode (or cropped to 1.5x AOV) = 26mp APS-C in not only resolution but now downgraded to APS-C sensor's DR, SNR and high ISO.

So basically I agree with you, if you want good image quality, full frame is cheaper than apsc

Usually it's easier to design lenses on larger sensor than crop-format lenses on smaller sensor. We have many such examples, such as Sigma tried very hard to design EF-S/DX 18-55/F1.8 zoom, not only bigger/heavier and shorter eq FL range but still softer than Canon EF 24-70L/2.8 II or Nikon 24-70/2.8 G lens on FF bodies. This is very true now entry level FF cameras are much cheaper, not significantly more expensive than APS-C cameras. The APS-C lenses on FF equivalency are only bigger, heavier and more expensive but likely still softer on respective cameras.

1.5x crop APS-C sensor = FF sensor cropped to 1.5x AOV (aka APS-C mode). If sensors are on the same generation technology, then 26mp APS-C sensor = 61mp FF sensor cropped to 1.5x AOV. 35mm FF lens even slightly inferior, as long as not significantly inferior should be still sharper and resolving more details on FF sensor than 23mm APS-C lens on APS-C sensor even at the same amount of pixels. Digital cropping < optical FL without cropping. There is no proof that the lens on X100V is much better than FE 35/2.8 ZA, no mention 26mp is much less than 42mp.

Yes.

 SafariBob's gear list:SafariBob's gear list
Sony RX1 Sony a7R II Sony a7R IV Canon EF 400mm f/2.8L IS USM Sony 70-400mm F4-5.6 G SSM +3 more
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