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RF100-500 Purple Dot Dead Center

Started 3 months ago | Discussions thread
Johnnyxbow Regular Member • Posts: 343
Re: RF100-500 Purple Dot Dead Center

nanciej wrote:

Hi

I am really hoping someone here may shine any light on this. About 16 months ago I bought the R5 and rf 100-500. Love them! I only photograph wildlife and I really only do it when I am in Africa. On the first trip with the kit, I noticed a purple dot, dead center. I only saw it on certain photos in the 140-170mm range. I sent the kit to Canon. They returned the R5 right away with a cleaned sensor. They said the brand new 100-500 was full of dirt and I would have to pay to get it cleaned. This was the issue. Every single Canon professional I had spoken to said dust would not form a perfect purple dot dead center. After some pushing and a rep from the store I do business with getting involved, Canon sent me a new 100-500.

November I found myself back in Africa and guess what? Purple dot. (images below) A couple of folks thought it might be the sensor...so I tired the lens on my R6. Same dot. It does not happen all the time. When it does, it is always between the 135-179mm range. I only ever see it at f14 or higher, which kind of makes sense. So two lenses and the issue is on two sensors.

Has anyone heard of this? Seen it? I am working once again with Canon support but the hoops!

Thanks for any thoughts.

Can I just ask if you are using the lens hood or not?

I did start reading through the thread but have not come across this question yet.

some post adjustments and a close up.

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