Warning when shutting off EOS R with EF lens and adpt.

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pna2973 New Member • Posts: 4
Warning when shutting off EOS R with EF lens and adpt.

I recently got the ef to rf mount adapter.

I was testing out my lenses but I realized that when using the EF lens it would give a warning say not do point into sunlight without lens cap off (or something along those lines). I was just curious on why this would occur?

Thanks

 pna2973's gear list:pna2973's gear list
Canon EOS R Canon EF 16-35mm F4L IS USM Canon RF 28-70mm F2L USM Canon RF 35mm F1.8 IS STM Macro
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