Visible Vignetting with RF100-500 + R5

[roush6ny]

 

 

Hi all

Noticing vignetting when viewing in equalize mode in almost all my photos. I’ve been using the same settings for 15 years with my aviation photography and I never saw this with my old 100-400 paired with the 70D

any input would be appreciated it. 

some sample photos attached (vignetting shows prior to editing) 

Thank you 

[kvbarkley]

What is your workflow? Are you using the Canon corrections?

[jrhoffman75]

Website the-digital-picture.com has a vignette tool.

[pcs1]

Modern lenses often rely on software to correct faults(like vignetting). You've got to use the right software and/or profile for the lens.

[johnrmoyer]

"I never saw this with my old 100-400 paired with the 70D" 

A crop sensor only uses the best part of the lens which is in the center. Have you tried the old 100-400 on the EOS R5? 

For processing images I usually use Canon DPP on macOS or Rawtherapee on Debian Linux. I use the "digital lens correction" in DPP or the similar "capture sharpening" in Rawtherapee. Recently, I often save a 16 bit TIFF from DPP and use gimp to add a second unsharp mask with a different radius and small amount. Gimp 3 is linked with a new JPEG compression algorithm that achieves both smaller file size and higher quality than the old algorithm used by DPP and much older Linux software. 

https://www.rsok.com/~jrm/2025Nov25_Salt_Plains_NWR/2025nov25_web_IMG_5079c.html 

Spider web at Salt Plains National Wildlife Refuge in Alfalfa County, Oklahoma, United States on November 25, 2025 ; EF100-400mm f/4.5-5.6L IS II USM +2x III

The above spiderweb was not cropped, but usually I crop.

https://www.rsok.com/~jrm/2025Nov25_Salt_Plains_NWR/2025nov25_eagle_IMG_5100c.html 

Bald Eagle (Haliaeetus leucocephalus) at Salt Plains National Wildlife Refuge in Alfalfa County, Oklahoma, United States on November 25, 2025

Camera Model Name	Canon EOS R5
Lens Model	EF100-400mm f/4.5-5.6L IS II USM +2x III
Focal Length	800 mm
Exposure Time	1/400
ISO	500
F Number	13.0
Camera Temperature	34 C
Measured EV	13.75
Measured EV 2	30
Focus Distance Upper	164.68 m
Focus Distance Lower	81.91 m

[shadowsports]

Greetings,

Was this lens purchased new or used?  What was the source?

[ebiggs1]

"I’ve been using the same settings for 15 years ... and I never saw this ..."

Something changed. Plain and simple. We know your gear has changed but what else. Are you using the same photo editor for instance?  The same lens profile or correct lens correction profile?

It is difficult to understand when you say, "I’ve been using the same settings for 15 years...", then such a drastic equipment upgrade has occurred so an adjustment to your 15 year old settings may be in order.

[Waddizzle]

 “ Noticing vignetting when viewing in equalize mode in almost all my photos. I’ve been using the same settings for 15 years with my aviation photography and I never saw this with my old 100-400 paired with the 70D “

———-

What is “equalize mode”?

It sounds like a third party app that I am not familiar with.

[johnrmoyer]

---

@Waddizzle wrote:

 “ Noticing vignetting when viewing in equalize mode in almost all my photos. I’ve been using the same settings for 15 years with my aviation photography and I never saw this with my old 100-400 paired with the 70D “

———-

What is “equalize mode”?

It sounds like a third party app that I am not familiar with.

---

Just guessing.

https://en.wikipedia.org/wiki/Histogram_equalization 

[ebiggs1]

I love eagle shorts.