Noise issue on Alpha 7iii

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AurelienC New Member • Posts: 2
Noise issue on Alpha 7iii

Hi everybody,

I am doing photography as a hobby and i have the feeling that my recent pictures exhibit significantly much more noise and lack of sharpness than at the beginning on my A7iii.

It is more obvious when i'm pushing the ISO (even at 300-400) and also when i'm underexposing. Here is an exemple of a shot at 400 iso on a tripod at sunset:

left side represent the middle of the photo

Here another example of a recent shot i find grainy and not sharp (lens used is the tamron 17-28 so not the sharpest as well) :

Any idea of what could be the cause?

Thanks!

ANSWER:
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juanmaasecas
juanmaasecas Senior Member • Posts: 1,155
Re: Noise issue on Alpha 7iii
9

For the first one, if you’re in a low iso but you’re pushing in post, it’s like if you shot at a higher iso. Also in the shadows is where noise is more apparent.

for the second one, if it’s less sharp as you expected it’s because you set the aperture at f20, and your sensor is diffraction limited. At f8-f11, the picture would have been much sharper.

your camera is fine and is not getting worse over time, don’t worry.

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SQLGuy Veteran Member • Posts: 9,675
Re: Noise issue on Alpha 7iii
1

Are these OOC JPGs? If not, how were they processed?

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D Cox Forum Pro • Posts: 27,120
Re: Noise issue on Alpha 7iii
1

The program Neat Image usually does a good job of removing or at least reducing noise.

In a shot like the sunset scene, you have to underexpose the ground to avoid overexposing the sky. But if you bracket your exposure, you can often merge the set of bracketed shots to get a better result. Affinity Photo is good for this.

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Nokiron
Nokiron Regular Member • Posts: 152
Re: Noise issue on Alpha 7iii
1

Yeah, there is definitely too much gear blame here. It's technique that needs to be improved.

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gjd_100 Forum Member • Posts: 57
Re: Noise issue on Alpha 7iii

Yup. That's why I'm in no position  to complain (yet). When my pictures come out bad.... place your bets on "operator error". 

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OP AurelienC New Member • Posts: 2
Re: Noise issue on Alpha 7iii

Thanks for your quick answers

The first one is just a crop not process of the raw file. I tried to process it a bit but i didn't manage to get anything out of it.

I agree for the second one, not the best sharpness at f20...

ahaslett
ahaslett Veteran Member • Posts: 7,087
Re: Noise issue on Alpha 7iii

AurelienC wrote:

Thanks for your quick answers

The first one is just a crop not process of the raw file. I tried to process it a bit but i didn't manage to get anything out of it.

I agree for the second one, not the best sharpness at f20...

You must have processed the raw file to make an image, even if you used default settings.  You could try selective noise reduction on the sky.

With such a dark main subject and bright lights in the background you might consider using flash next time.  Alternatively you could find another light source where you were.

Andrew

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Magnar W
Magnar W Veteran Member • Posts: 5,084
If pushing at post, be aware of second gain level

juanmaasecas wrote:

For the first one, if you’re in a low iso but you’re pushing in post, it’s like if you shot at a higher iso. Also in the shadows is where noise is more apparent.

Be aware of second gain level with Sony cameras when using higher ISO than base ISO (ISO 100). With the A7III and A7rIII you will get cleaner results from ISO 640 than from lower ISO settings, due to how noise is handled in-camera before the raw files are written.

for the second one, if it’s less sharp as you expected it’s because you set the aperture at f20, and your sensor is diffraction limited. At f8-f11, the picture would have been much sharper.

There is typically a slight loss in sharpness from f:11 to f:16 and a significant loss at smaller aperture settings.

your camera is fine and is not getting worse over time, don’t worry.

True!

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