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How to remove shadows on Sony a5100

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luizcrf View Drop Down
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Post Options Post Options   Quote luizcrf Quote  Post ReplyReply Direct Link To This Post Topic: How to remove shadows on Sony a5100
    Posted: 29 May 2020 at 05:12
Hello everyone!
Two weeks ago I bought a Sony a5100 with 16-50 lenses (Model SELP1650), but when I started filming I noticed shadows around the image.
I researched forums about the problem, and saw that it could be an effect called 'vignette'.
I shoot with the setting 1/80 F5.6 and ISO around 400 to 600 (with 3 lamps of 60w in a room of 3 meters by 3 meters)
and I was recommended to set the camera to 1/60 F11 and a higher ISO (around 2000)
I put this setting, but with the ISO increased, the image is very saturated.
Is there any other solution to remove these shadows?
The camera is very good, and the focus is fast, but this problem with "shadows" (or "vignettes") is putting an end to my filming.


The image below is part of a shot on a white wall
Configurations: 1/80 F5.6 and ISO around 400 to 600 (with 3 60w lamps in a 3 meter by 3 meter room)
https://imgur.com/yRsQuai
 



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addy landzaat View Drop Down
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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 29 May 2020 at 07:50
Hello luizcrf, welcome to Dyxum

Check if you have lens compensation activated in the menu. According to the Sony Helpguide on the A5100 you should find the vignetting here:

MENU → (Custom Settings {sprocket wheel}) → [Lens Comp.] → [Shading Comp.] → desired setting.
Auto (default setting):
Compensates for darker corners of the screen automatically.
Off:
Does not compensate for darker corners of the screen

Make sure it is set to "auto".

Vignetting is an attribute of the lens, if it annoys you even when the menu is set to auto, I think you have to try another lens.
Why not follow me on Instagram? @Addy_101
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Post Options Post Options   Quote Hezu Quote  Post ReplyReply Direct Link To This Post Posted: 29 May 2020 at 07:57
First, welcome to Dyxum!

I have to admit that I have no personal experience with neither that particular camera nor lens, but it is fairly common feature that shooting wide open (in case of this lens, F5.6 @ 50 mm) you may get some vignetting in corners and once you use smaller aperture (=larger F-number) this effect decreases. And when using smaller aperture that means you need either more light, shorter exposure time or higher ISO sensitivity to get similar exposure to wide open condition. Shorter exposure time may then need more stability to avoid motion blur, so it might be necessary to use tripod. Higher ISO sadly often mean more noise in the image.

So, what could you do avoid vignetting in your setting? You could try bringing some extra lighting, shoot with smaller aperture and shorter exposure time and possibly use tripod if you are not yet using one. Also using some other lens (possibly one providing with faster aperture) could provide less vignetting, but obviously acquiring new lenses cost something unless you borrow the lens from somebody.

Btw, and where is the DSLR mentioned in the thread title? The subject on your picture is a pen and your camera is mirrorless?
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Post Options Post Options   Quote horizon Quote  Post ReplyReply Direct Link To This Post Posted: 29 May 2020 at 08:18
Another possible issue is that the lens hood could be 90 misaligned.
So that the petals of the lens hood are not aligned with the sensor.

Aperture settings has little to do with Vignetting, more to do with the sharpness of the image.

I once misaligned the lenshood many years ago, when I was doing a night shoot and I was going by feel rather than by sight and when reviewing the image taken, the lens petals were not visible on the rear camera screen and wasnt until I viewed the images on the computer, that I noticed the vignetting and it was very odd because that lens had never had any vignetting before. So I started looking how I managed to get the fignetting and managed to replicate the issue and it was because I was putting the lens hood on basically the bottom part of the lenshood to the top of the lens and this was the cause.

Lesson learned.

Hope it helps.
Regards,
Craig
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Post Options Post Options   Quote SnowFella Quote  Post ReplyReply Direct Link To This Post Posted: 29 May 2020 at 08:34
Shouldn't have to go all the way up to F/11 to clean up the vignette though, ought to be well clear by F/8.

What's not clear to me though is if you are taking photos or video? If it's photos and you have a tripod then there's no need for the high ISO in product shots, just let the shutter speed compensate.
If it's video then there's again no need to let the ISO go that high, just add more light.

As for the Shading Compensation...not one to do video so not really sure if it works for filming.
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Post Options Post Options   Quote Aavo Quote  Post ReplyReply Direct Link To This Post Posted: 29 May 2020 at 11:06
Welcome to Dyxum!
As addy posted, vignetting is not about camera, it is about lens.
I started to find, how it looks on my a6500, and yes, the very first menu has submebu "Lens Comp." On a6500 there are 3 isseus: Shading Comp, Crom Aber Comp & Distortion Comp. If all 3 are selected to "Auto", you will have nice recordings even with 16-50, despite it's small size and collapsible construction.
a6500 & 20/2.8, 24/1.8, 56/1.4, 18-135/3.5-5.6 OSS
 



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pegelli View Drop Down
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Post Options Post Options   Quote pegelli Quote  Post ReplyReply Direct Link To This Post Posted: 29 May 2020 at 13:13
As Addy mentioned make sure in the menu your automatic lens correction is "On" or "Auto" but also that both the lens and camera have the latest firmware installed.

If not try f8 (vignetting usually increases with wide open aperture), increasing iso really shouldn't increase the saturation of the colours, unless you've set that as such in the "Creative Style" or "Picture Effect", make sure everything is at 0 or neutral there.

Since the 16-50 has no hood it's unlikely that's causing a problem, especially since you're shooting at the longest focal length.

Last but not least, welcome to Dyxum
Mind the bandwidth of others, don't link pictures larger then 1024 wide or 960 pix high, see here
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Post Options Post Options   Quote luizcrf Quote  Post ReplyReply Direct Link To This Post Posted: 04 June 2020 at 05:13
Originally posted by addy landzaat addy landzaat wrote:

Hello luizcrf, welcome to Dyxum

Check if you have lens compensation activated in the menu. According to the Sony Helpguide on the A5100 you should find the vignetting here:

MENU → (Custom Settings {sprocket wheel}) → [Lens Comp.] → [Shading Comp.] → desired setting.
Auto (default setting):
Compensates for darker corners of the screen automatically.
Off:
Does not compensate for darker corners of the screen

Make sure it is set to "auto".

Vignetting is an attribute of the lens, if it annoys you even when the menu is set to auto, I think you have to try another lens.


Hi, I checked this option, and it is "enabled"
I watched user videos on youtube with the same camera as mine, and with the same lens. None of the videos had a "vignette".
Could it be that my lens is defective?
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Post Options Post Options   Quote luizcrf Quote  Post ReplyReply Direct Link To This Post Posted: 04 June 2020 at 05:16
Originally posted by pegelli pegelli wrote:

As Addy mentioned make sure in the menu your automatic lens correction is "On" or "Auto" but also that both the lens and camera have the latest firmware installed.

If not try f8 (vignetting usually increases with wide open aperture), increasing iso really shouldn't increase the saturation of the colours, unless you've set that as such in the "Creative Style" or "Picture Effect", make sure everything is at 0 or neutral there.

Since the 16-50 has no hood it's unlikely that's causing a problem, especially since you're shooting at the longest focal length.

Last but not least, welcome to Dyxum


Hello, thanks.
The function is activated.
The camera has updated firmware.
I will disable the "Creative Style" or "Picture Effect" effect
thanks
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Post Options Post Options   Quote QuietOC Quote  Post ReplyReply Direct Link To This Post Posted: 04 June 2020 at 11:56
The built-in Shading compensation won't remove all of the vignette. The 16-50 PZ corner shading is quite severe optically on the wide end. It might be that your particular copy is somewhat worse. Any other lens will probably be better. Software could help. Avoiding the widest zoom setting and stopping down the aperture should help too.

Edited by QuietOC - 04 June 2020 at 11:59
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Post Options Post Options   Quote pegelli Quote  Post ReplyReply Direct Link To This Post Posted: 04 June 2020 at 12:39
Originally posted by luizcrf luizcrf wrote:


The camera has updated firmware.
Make sure that the same is true for the lens firmware, that's where the vignetting correction settings are stored.
Mind the bandwidth of others, don't link pictures larger then 1024 wide or 960 pix high, see here
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QuietOC View Drop Down
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Post Options Post Options   Quote QuietOC Quote  Post ReplyReply Direct Link To This Post Posted: 04 June 2020 at 13:23
There is no firmware update for the 16-50 PZ.
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pegelli View Drop Down
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Post Options Post Options   Quote pegelli Quote  Post ReplyReply Direct Link To This Post Posted: 04 June 2020 at 14:12
OK, so that's not the problem then. I thought I had updated it once but looking back that was for my 18-55 kit, not for the 16-50.
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