A7Riv & 20mm fe 1.8G

[cyberhash 1]

Don't know if this should be in the camera section or the lens section .....

This sample is of a night shot that i took at night @f16 on the above lens. Does anyone here know what these circular bands are ???. Its present on Raw files when i try and crank the exposure up a little in post.  It happens with or without a polarising filter as i thought it might have been from some sort of glare from the diaphragm on the sensor.

Any ideas ???

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Hi,

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[mirrorlessNY(youtuber) 12]

maybe lens glare? does same happen in video? what about different lens?

[cyberhash 1]

49 minutes ago, mirrorlessNY(youtuber) said:

maybe lens glare? does same happen in video? what about different lens?

Some form of glare was my inital thoughts too, but don't have a second lens to test with it just now.

What's really strange is the out of Camera JPG's are not affected and only the raw files as i shoot both raw/jpg at the same time.

Have tried it in a few different software packages like camera raw/ lightroom and on1. They all have the profiles for this lens so its not down to software i don't think 😕

[mirrorlessNY(youtuber) 12]

On 11/1/2020 at 5:52 PM, cyberhash said:

What's really strange is the out of Camera JPG's are not affected and only the raw files

maybe JPG's don't have enough quality to show this 😕 curious to see if same happens with a different lens, can also try different apertures

[dbmiller 15]

Lens shading compensation. Turn it off in camera if you going to be pushing dark exposures.

[Nomakase 0]

I'm shooting with the same setup and keep getting these green orbs. 

[AntDX316 0]

On 11/15/2020 at 4:17 PM, dbmiller said:

Lens shading compensation. Turn it off in camera if you going to be pushing dark exposures.

Shading compensation just fixes the vignetting I think?

[dbmiller 15]

32 minutes ago, AntDX316 said:

Shading compensation just fixes the vignetting I think?

It's a circular pattern applied to the RAW data before writing the RAW file in an attempt to fix vignetting. But it's not perfect, so it can cause what appears to be a circular banding - Especially when the exposure is heavily pushed in post.

[AntDX316 0]

On 1/9/2021 at 4:20 PM, dbmiller said:

It's a circular pattern applied to the RAW data before writing the RAW file in an attempt to fix vignetting. But it's not perfect, so it can cause what appears to be a circular banding - Especially when the exposure is heavily pushed in post.

nice, I saw this just now

What do you think about chromatic aberration correction?  turn it off?

[dbmiller 15]

On 4/21/2021 at 4:26 PM, AntDX316 said:

nice, I saw this just now

What do you think about chromatic aberration correction?  turn it off?

Not sure. I don't know if the CA correction is only applied to the JPEG, or if it is also applied to the RAW file. If the latter, you could turn it off if you want to do it yourself. But it shouldn't be anywhere near as bad as the vignette correction can be for underexposed images as CA tends to occur in high contrast areas.

[AntDX316 0]

2 hours ago, dbmiller said:

Not sure. I don't know if the CA correction is only applied to the JPEG, or if it is also applied to the RAW file. If the latter, you could turn it off if you want to do it yourself. But it shouldn't be anywhere near as bad as the vignette correction can be for underexposed images as CA tends to occur in high contrast areas.

Does CA and Shading Compensation affect video?

[dbmiller 15]

On 4/22/2021 at 9:06 PM, AntDX316 said:

Does CA and Shading Compensation affect video?

No idea

[photocowb0y 0]

On 4/22/2021 at 5:28 PM, dbmiller said:

Not sure. I don't know if the CA correction is only applied to the JPEG, or if it is also applied to the RAW file. If the latter, you could turn it off if you want to do it yourself. But it shouldn't be anywhere near as bad as the vignette correction can be for underexposed images as CA tends to occur in high contrast areas.

I heard that the CA correction is exclusively applied to the JPEG. However, I'm not 100% sure.