This is just a quick test to compare the focus and the focus sound between the Panasonic 25mm f1.7 and the pancake 20mm f1.7. I have amplified the audio in post to make it easier to hear. This was shot on a Lumix GX8 More comparisons on my blog: http://blog.guillermoramos.net/post/139393123267/20mmvs25mm
