What is causing vignette effect on my images?

[PinewoodPhoto]

Hello, looking for suggestions to correct the vignette effect from my new lens. I currently have an EOS-R mirrorless body. I just purchased a Canon RF 15-30mm f/4.5-6.3 IS STM Lens. Both full frame compatibility. First time using this, many of my images have dark corners but not all. I am not using anything that would cause a physical vignette such as a hood or filter. After reading a few articles, it appears this could be caused by the aperture. Although this can be adjusted in processing, I'm disappointed this is happening. Any suggestions on what I can do to prevent this- or is this just a part of the process with this lens?  Any other camera settings that might help this? My camera is set to full frame. Thank you!

[jrhoffman75]

---

@PinewoodPhoto wrote:

Hello, looking for suggestions to correct the vignette effect from my new lens. I currently have an EOS-R mirrorless body. I just purchased a Canon RF 15-30mm f/4.5-6.3 IS STM Lens. Both full frame compatibility. First time using this, many of my images have dark corners but not all. I am not using anything that would cause a physical vignette such as a hood or filter. After reading a few articles, it appears this could be caused by the aperture. Although this can be adjusted in processing, I'm disappointed this is happening. Any suggestions on what I can do to prevent this- or is this just a part of the process with this lens?  Any other camera settings that might help this? My camera is set to full frame. Thank you!

---

Where are you seeing the vignette? Some RF lenses rely on digital correction in camera or in Canon DPP. If you are using a third-party software that may be the issue.

[PinewoodPhoto]

Thank you for this! I am using third party software for editing. I will check to see if this could be the issue. My 50mm prime has never had this happen, so seems specific to this lens. 

[jrhoffman75]

From The Digital Picture site review of the lens:

"A lens can be expected to show peripheral shading at the widest aperture settings when used on a camera that utilizes a lens's entire image circle. This lens has wide-open aperture shading ranging from about 3.5 stops at 15mm to just under 3 stops at 30mm. While these amounts are not unusual from a wide-open aperture, they are obvious in an image. At f/8, the shading range is 2.5 to 2 stops, and little change is affected by stopping down to f/16, where a still strong over 2 stops of shading is present over the range. The exception is at 30mm, where the amount is slightly lower — just under 2 stops."

[shadowsports]

Greetings,

John pointed out solutions for correcting vignetting on lenses which may require correction for best image quality.

Check your editing software to see if it has a lens profile for the RF 15-30 f4.5-6.3.

If it doesn't Canon's DPP does.  

You can also enable Peripheral Illumination correction in body as he mentioned.

See page 343:

eosr-ug9-en.pdf (c-wss.com)

[PinewoodPhoto]

Great suggestions, really appreciate it!