u can clean the viewfinder under the viewfinder theres a slide button thatll take it off, thats just all dust in there. the vx2k uses had ccds, thats why its better at night but also why in daytime the sky is more blown out then the vx1k, the 2k is ALOT sharper, the 2k has a flip out wich is great for show filming dont use it for anything else though, the vk1 doesnt have a zoom ring either. the main thing is that the vx2k has 2 lux and the vx1k has 7