rp1608

I have 3 cameras on a hikvision DVR, on playback the quality on 2 of them is fine. But one camera has an issue. When I playback an event, it plays the first 5 seconds before the event in correct quality, but when there is movement, the quality drops and is more blocky, the audio records fine though. Everything looks fine on the settings. HELP

I found something on ebay, though would prefer UK location http://www.ebay.co.uk/itm/Any-4-Pcs-3-6mm-6mm-8mm-12mm-Board-Lens-For-CCTV-Camera-UKB-/380648626766?pt=UK_CCTV&hash=item58a06d1a4e I assume I am looking for M12 thread?

Hi all I have a Nite Devil CAM950 with a fitted 3.6mm lense, like below It appears to have screws to loosen the thread and perhaps remove the current lense, am I right and can I change this for a 6mm or 8mm lense. Does anyone know which lense I should buy, I am sure there are some on ebay somewhere! Thanks

I have a Sunluxy 8 Channel DVR, works great but would like to be able to set prerecord for 5 secs before motion detection event. Anyone with experience on these models please? Thanks