Jonas B wrote:
The lens replaces my Sigma 50/2 DG DN
Maybe you could take a few comparison shots at wide aperture before you sell the Sigma. In the bike photos I posted, the background blur of the Air is less pronounced than the GM at the same aperture. I'd be interested to see how such a comparison of the Air and Sigma turns out.
I can try some propers ones later as well and share them.
With the testing below I didn't check sharpness as I used autofocus for most of them after having a tough time trying manually to see a difference when I can see the focus is changing.
I think they are rather similar.
Looking for differences, with quick test shots I took wide open, the Sigma has:
- tighter focal length
- noticeably less vignetting
- bit smoother bokeh
- cooler colour temperature
Sigma is also considerably heavier, longer, and more expensive.
Viltrox is amazing for comfort, significantly more than the Sigma with the A7Cii, but the Sigma is still close to my other compact ones and is completely fine. Very close to the 35mm from them.
While it's a nicer build on the Sigma with the metal, of the cheap lenses I have this Viltrox is up there with the build quality that you can see and feel. Very happy with it in that regard and I don't particularly miss the aperture control.
Neither Viltrox nor Sigma are weather sealed as far as I know, pretty disspointing for the Sigma considering the price.
I did read one review mention Sigma was weather sealed but iirc the rest said it was not.
Both are 58mm filter thread size.
Viltrox left, Sigma right:
Sometimes it's more noticeable, other times you'd have to zoom in quite a bit to see any difference, or really pay attention.
With the 2nd shot that had the brick wall as part of the background, it was more noticeable that the Sigma was a bit smoother. Probably more obvious if you zoom out with your web browser to see it.
Third shot they looked basically identical, blowing it up showed the difference (it's zoomed in a lot that one).
They are very close and these images can maybe give the wrong idea that the difference is larger than it is with the bokeh. But it is smoother with the Sigma. Just not a huge difference.
In lightroom, doing the white balance and enabling lens corrections, when going from one image to the next, the biggest differences in the images were the focal length and a little less structure in parts of the background blur.
Otherwise, seemed pretty much the same in the couple of shots I took. Very similar looks.
Oct 10, 2025 at 09:07 AM
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Jonas B wrote:
The lens replaces my Sigma 50/2 DG DN
Maybe you could take a few comparison shots at wide aperture before you sell the Sigma. In the bike photos I posted, the background blur of the Air is less pronounced than the GM at the same aperture. I'd be interested to see how such a comparison of the Air and Sigma turns out.
I can try some propers ones later as well and share them.
With the testing below I didn't check sharpness as I used autofocus for most of them after having a tough time trying manually to see a difference when I can see the focus is changing.
I think they are rather similar.
Looking for differences, with quick test shots I took wide open, the Sigma has:
- tighter focal length
- noticeably less vignetting
- bit smoother bokeh
- cooler colour temperature
Sigma is also considerably heavier, longer, and more expensive.
Viltrox is amazing for comfort, significantly more than the Sigma with the A7Cii, but the Sigma is still close to my other compact ones and is completely fine. Very close to the 35mm from them.
While it's a nicer build on the Sigma with the metal, of the cheap lenses I have this Viltrox is up there with the build quality that you can see and feel. Very happy with it in that regard and I don't particularly miss the aperture control.
Neither Viltrox nor Sigma are weather sealed as far as I know, pretty disspointing for the Sigma considering the price.
I did read one review mention Sigma was weather sealed but iirc the rest said it was not.
Both are 58mm filter thread size.
Viltrox left, Sigma right:
Sometimes it's more noticeable, other times you'd have to zoom in quite a bit to see any difference, or really pay attention.
With the 2nd shot that had the brick wall as part of the background, it was more noticeable that the Sigma was a bit smoother. Probably more obvious if you zoom out with your web browser to see it.
Third shot they looked basically identical, blowing it up showed the difference (it's zoomed in a lot that one).
They are very close and these images can maybe give the wrong idea that the difference is larger than it is with the bokeh. But it is smoother with the Sigma. Just not a huge difference.
In lightroom, doing the white balance and enabling lens corrections, when going from one image to the next, the biggest differences in the images were the focal length and a little less structure to in the background blur.
Otherwise, seemed pretty much the same in the couple of shots I took. Very similar looks.
Oct 10, 2025 at 09:03 AM
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Jonas B wrote:
The lens replaces my Sigma 50/2 DG DN
Maybe you could take a few comparison shots at wide aperture before you sell the Sigma. In the bike photos I posted, the background blur of the Air is less pronounced than the GM at the same aperture. I'd be interested to see how such a comparison of the Air and Sigma turns out.
I can try some propers ones later as well and share them.
With the testing below I didn't check sharpness as I used autofocus for most of them after having a tough time trying manually to see a difference when I can see the focus is changing.
I think they are rather similar.
Looking for differences, with quick test shots I took wide open, the Sigma has:
- tighter focal length
- noticeably less vignetting
- bit smoother bokeh
- cooler colour temperature
Sigma is also considerably heavier, longer, and more expensive.
Viltrox is amazing for comfort, significantly more than the Sigma with the A7Cii, but the Sigma is still close to my other compact ones and is completely fine. Very close to the 35mm from them.
While it's a nicer build on the Sigma with the metal, of the cheap lenses I have this Viltrox is up there with the build quality that you can see and feel. Very happy with it in that regard and I don't particularly miss the aperture control.
Neither Viltrox nor Sigma are weather sealed as far as I know, pretty disspointing for the Sigma considering the price.
I did read one review mention Sigma was weather sealed but iirc the rest said it was not.
Both are 58mm filter thread size.
Viltrox left, Sigma right:
Sometimes it's more noticeable, other times you'd have to zoom in quite a bit to see any difference, or really pay attention.
With the 2nd shot that had the brick wall as part of the background, it was more noticeable that the Sigma was a bit smoother. Probably more obvious if you zoom out with your web browser to see it.
Third shot they looked basically identical, blowing it up showed the difference (it's zoomed in a lot that one).
They are very close and these images do may be give the wrong idea that the difference is larger than it is with the bokeh. But it is smoother with the Sigma. Just not a huge difference.
In lightroom, doing the white balance and enabling lens corrections, when going from one image to the next, the biggest differences in the images were the focal length and a little less structure to in the background blur.
Otherwise, seemed pretty much the same in the couple of shots I took. Very similar looks.
Oct 10, 2025 at 09:01 AM
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Jonas B wrote:
The lens replaces my Sigma 50/2 DG DN
Maybe you could take a few comparison shots at wide aperture before you sell the Sigma. In the bike photos I posted, the background blur of the Air is less pronounced than the GM at the same aperture. I'd be interested to see how such a comparison of the Air and Sigma turns out.
I can try some propers ones later as well and share them.
With the testing below I didn't check sharpness as I used autofocus for most of them after having a tough time trying manually to see a difference when I can see the focus is changing.
I think they are rather similar.
Looking for differences, with quick test shots I took wide open, the Sigma has:
- tighter focal length
- noticeably less vignetting
- bit smoother bokeh
- cooler colour temperature
Sigma is also considerably heavier, longer, and more expensive.
Viltrox is amazing for comfort, significantly more than the Sigma with the A7Cii, but the Sigma is still close to my other compact ones and is completely fine. Very close to the 35mm from them.
While it's a nice build on the Sigma, but of the cheap lenses I have, this Viltrox is up there with the build quality that you can see and feel. Very happy with it in that regard and I don't particularly miss the aperture control.
Neither Viltrox nor Sigma are weather sealed as far as I know, pretty disspointing for the Sigma considering the price.
I did read one review mention Sigma was weather sealed but iirc the rest said it was not.
Both are 58mm filter thread size.
Viltrox left, Sigma right:
Sometimes it's more noticeable, other times you'd have to zoom in quite a bit to see any difference, or really pay attention.
With the 2nd shot that had the brick wall as part of the background, it was more noticeable that the Sigma was a bit smoother. Probably more obvious if you zoom out with your web browser to see it.
Third shot they looked basically identical, blowing it up showed the difference (it's zoomed in a lot that one).
They are very close and these images do may be give the wrong idea that the difference is larger than it is with the bokeh. But it is smoother with the Sigma. Just not a huge difference.
In lightroom, doing the white balance and enabling lens corrections, when going from one image to the next, the biggest differences in the images were the focal length and a little less structure to in the background blur.
Otherwise, seemed pretty much the same in the couple of shots I took. Very similar looks.
Oct 10, 2025 at 08:59 AM
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Jonas B wrote:
The lens replaces my Sigma 50/2 DG DN
Maybe you could take a few comparison shots at wide aperture before you sell the Sigma. In the bike photos I posted, the background blur of the Air is less pronounced than the GM at the same aperture. I'd be interested to see how such a comparison of the Air and Sigma turns out.
I can try some propers ones later as well and share them.
With the testing below I didn't check sharpness as I used autofocus for most of them after having a tough time trying manually to see a difference when I can see the focus is changing.
I think they are rather similar.
Looking for differences, with quick test shots I took wide open, the Sigma has:
- tighter focal length
- noticeably less vignetting
- bit smoother bokeh
- cooler colour temperature
Sigma is also considerably heavier, longer, and more expensive.
Viltrox is amazing for comfort, significantly more than the Sigma with the A7Cii, but the Sigma is still close to my other compact ones and is completely fine. Very close to the 35mm from them, very happy with it and don't particularly miss the aperture control.
It's a nice build on the Sigma, but of the cheap lenses I have, this Viltrox is up there with the build quality that you can see and feel.
Neither Viltrox nor Sigma are weather sealed as far as I know, pretty disspointing for the Sigma considering the price.
I did read one review mention Sigma was weather sealed but iirc the rest said it was not.
Both are 58mm filter thread size.
Viltrox left, Sigma right:
Sometimes it's more noticeable, other times you'd have to zoom in quite a bit to see any difference, or really pay attention.
With the 2nd shot that had the brick wall as part of the background, it was more noticeable that the Sigma was a bit smoother. Probably more obvious if you zoom out with your web browser to see it.
Third shot they looked basically identical, blowing it up showed the difference (it's zoomed in a lot that one).
They are very close and these images do may be give the wrong idea that the difference is larger than it is with the bokeh. But it is smoother with the Sigma. Just not a huge difference.
In lightroom, doing the white balance and enabling lens corrections, when going from one image to the next, the biggest differences in the images were the focal length and a little less structure to in the background blur.
Otherwise, seemed pretty much the same in the couple of shots I took. Very similar looks.
Oct 10, 2025 at 08:55 AM
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Jonas B wrote:
The lens replaces my Sigma 50/2 DG DN
Maybe you could take a few comparison shots at wide aperture before you sell the Sigma. In the bike photos I posted, the background blur of the Air is less pronounced than the GM at the same aperture. I'd be interested to see how such a comparison of the Air and Sigma turns out.
I can try some propers ones later as well and share them.
They are relatively similar.
Looking for differences, with quick test shots I took wide open, the Sigma has:
- tighter focal length
- noticeably less vignetting
- bit smoother bokeh
- cooler colour temperature
Sigma is also considerably heavier, longer, and more expensive.
Viltrox is amazing for comfort, significantly more than the Sigma with the A7Cii, but the Sigma is still close to my other compact ones and is completely fine. Very close to the 35mm from them, very happy with it and don't particularly miss the aperture control.
It's a nice build on the Sigma, but of the cheap lenses I have, this Viltrox is up there with the build quality that you can see and feel.
Neither Viltrox nor Sigma are weather sealed as far as I know, pretty disspointing for the Sigma considering the price.
I did read one review mention Sigma was weather sealed but iirc the rest said it was not.
Both are 58mm filter thread size.
Viltrox left, Sigma right:
Sometimes it's more noticeable, other times you'd have to zoom in quite a bit to see any difference, or really pay attention.
With the 2nd shot that had the brick wall as part of the background, it was more noticeable that the Sigma was a bit smoother. Probably more obvious if you zoom out with your web browser to see it.
Third shot they looked basically identical, blowing it up showed the difference (it's zoomed in a lot that one).
They are very close and these images do may be give the wrong idea that the difference is larger than it is with the bokeh. But it is smoother with the Sigma. Just not a huge difference.
In lightroom, doing the white balance and enabling lens corrections, when going from one image to the next, the biggest differences in the images were the focal length and a little less structure to in the background blur.
Oct 10, 2025 at 08:05 AM
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