Your current video lenses might hit their limits
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Your current video lenses might hit their limits

A single frame of 4K video delivers around 8.2MP of resolution, something that's comfortably within the resolving range of almost any lens from the modern digital era (and many earlier ones). In contrast, 8K video delivers roughly 33MP frames.

That's within the working range of quite a few still cameras, and many recent optics are certainly capable of resolving that level of detail. If you already have higher resolving lenses that's great, but if you've been shooting video using older lenses – including some from the digital era – you may find that you need to upgrade your glass to get the most out of 8K video.