I have previously used 400mm l, 300mm f2.8 before deciding to trade off my dslr for a viewcam. I have bought v700 from panasonic.

Of course, the lens is so small and cheap and I doubt it can match even my canon 50mm f1.8. But due to the small sensor size, I am able to get a 46x lossely zoom which equal to 1500mm. I was thinking if zoom to a tower clock 1km away, the pana should be able to capture the detail in full hd. For the 50mm prime I am sure that it will not be able to capture the details