This is the cover the custom for Galaxy S10 and S10+ (2 different covers):
what's the use for a CPL?
A circular polarizing filter is a landscape photographer’s best camera accessory as it allows you to capture vividness and contrast in a photo. I have even used it to capture cityscapes and trust me it completely changes the image once you have it mounted on your camera lens. Having said that, let me take you through detailed uses of a CPL filter.
https://digital-photography-school.com/circular-polarizing-filter-how-use/
If you would like to deepen in photography, CPL is always a friend to you.
OK, let's see what we've done to the smartphone?
this is the cover with smartphone.
We have 2 different covers, they are for S10 and S10+
Here is the link:
https://dckina.com/index.php?main_page=product_info&cPath=5_356&products_id=2387
We also have some CPL lens demo video at Youtube:
click here to check at our Youtube Channel:
https://www.youtube.com/dckina