Marshall Levy, who wrote our compact flash test results, is finding issues with the lenses that adorn the latest HDV camcorders from Sony- the HVR-Z7U and the HVR-S270. He’s found focusing issues, lens wobble and says the issue was confirmed by Sony.
Do you have one of the new camcorders?
Try out the tests he suggests to help determine if this is an isolated incident or a more widespread issue.
I E B A Tech Thoughts 
Regarding the Sony HVR-Z7U / S270, rolling shutter issue (cmos chips)has anyone had any experience shooting in wedding reception settings, where still flashes are continually firing in what is usually a low-light setting? Seems like an ideal situation to catch the half-black of a partially captured rolling shutter frame at 1/60 sec.
I have seen this problem but this seems minor compared to the grain I get shooting dance footage at wedding receptions. I sent the camera back Sony, N. J. Repair.I’m
waiting for an answer. The results I Get with my Sony hvr Z1u are much better.
Given that the new HDV camcorders are significantly more sensitive than the Z1U, I’m curious what grain you say you see that is not evident on the older camcorders.