GH5 WB: Kelvin degrees or presets? Which of both can you trust?

[Greg_E]

White balance lens cap? Or one of these to hold in front of the lens? https://www.amazon.com/JJC-White-Ba...coding=UTF8&psc=1&refRID=VGH9EB8EE9BTHGSVV9W5

 

[FoxAdriano]

Only I need to put it in my pocket. But why do you ask me this question?