topic Re: EOS Rebel T7 Reflected light shows up as purple/green in EOS DSLR & Mirrorless Cameras

EOS Rebel T7 Reflected light shows up as purple/green

Entity303 — Sat, 22 Feb 2025 15:11:40 GMT

Hello. I had a question about how the T7 captures light. In other people’s pictures, light is shown as, well, normal color light. When I take a picture the light shows up as purple/green as seen on the reflections from the sun in the picture below. Especially the windshield of the truck in the background, and the reflections on the engines. Does anyone know if you can fix this? Or is it just a quirk of the t7?

taken with the EF-S 75-300mm kit lens, at 400 ISO and f4-5.6

Re: EOS Rebel T7 Reflected light shows up as purple/green

jrhoffman75 — Sat, 22 Feb 2025 16:18:31 GMT

Could be lens flare. Reflection onto lens affected by lens coating.

What Is Lens Flare, and Why Does It Make Photos Look Weird?

Re: EOS Rebel T7 Reflected light shows up as purple/green

stevet1 — Sat, 22 Feb 2025 16:41:54 GMT

Entity303,

You might also read up on chromatic aberration, and see what steps you can take to avoid it and/or correct it.

Steve Thomas

Re: EOS Rebel T7 Reflected light shows up as purple/green

Entity303 — Sat, 22 Feb 2025 17:17:50 GMT

Thanks for the replies! I will check them out.

Re: EOS Rebel T7 Reflected light shows up as purple/green

FloridaDrafter — Sat, 22 Feb 2025 17:43:57 GMT

That is definitely "chromatic aberration", sometimes referred to as "color fringing". Generally, it will occur in areas where there is high contrast between light and dark. If you look close, you can also see it along the door of the jet, although not as pronounced.

"I had a question about how the T7 captures light"

To be clear, it isn't the camera it is the EF 75-300 lens, although some cameras can correct for this to a certain degree, it is still a lens problem. According to the EXIF data in your image, you have the first iteration of The EF 75-300, although capable to a certain extent, it wasn't Canons best effort and as John pointed out, lacks enough lens coatings to help combat aberrations and distortion. I have all three versions of the EF 75-300 that came as kit or bonus lenses with some of my Rebels, so I know their weaknesses. As Steve pointed out, you can correct for it either in camera settings or post processing using PS or DPP 4. DPP 4 is a free download that you can find on the Canon support page for your T7, but you will have to shoot in Raw to take advantage of the lens corrections included with DPP as it will not apply it to JPeG files, after all, it is a Raw editor 🙂

Newton

Re: EOS Rebel T7 Reflected light shows up as purple/green

deebatman316 — Sat, 22 Feb 2025 18:27:30 GMT

What you're seeing is called "Chromatic Aberrations" the EF 75-300mm F/4-5.6 lens lineup is known for this. It can be removed with lens corrections in camera if it supports it or in post. But the bottom line is that this lens is very poor optically and you really can't do too much with it. To make it simpler the cause of Chromatic Aberrations is the lens. This lens requires a lot of correction to remove CA and is generally considered a poor lens especially since it has no IS either. So take the advice from my colleagues @FloridaDrafter @jrhoffman75 & @stevet1 .