I use the Summarit with the sun visor. It is a Leica UV a filter 13004. Since there is no lens cap that fits the lens hood, I wonder if, and if so, the image quality (coloration and sharpness) suffers from using the filter. Or is there a possibility that the filter has negative effects depending on the weather (summer, winter, sun, rain, temperature fluctuations)?
It only serves as protection, because unfortunately it has already happened to me that I have touched the glas of the lens, when I take it out of my pocket.
As a camera I use the M10 R. I hope your experiences can help me to answer this question.
Thank you in advance for your support.