[Dennis G]

Making the daylight test recordings with the new DMK 21 AU 04, two vertical lines appeared on the left side of each picture. Confused with new equipment I was at a loss which to blame. Telescope, camerra or laptop computer so I set up a test rig using a focal reducer that happened to focus a picture at about 1500 mm. I didn't need to process these as the lines were visible in the raw AVI recordings. Turning the camera on either side still produced vertical lines - they didn't follow the camer's position - and it wasn't until posting to IIS that it dawned on me, this had to be some thing independant of the recording chip. It so happenned that the cable that came with my add on hard disc is similar to the DMK cable and exchanging the cables produced pictures with no obvious vertical lines. As I wrote in previous articles the day time viewing of subjects at a reasonable distance is limited to a view from the livingroom window across the harbour. Back in the telescope, lines were not visible in land base objects at 60 or 30 fps but a reording of a navigation marker where the water is in motion and becomes a light grey blur when processed, a very faint line can be seen when taken with 60 fps but not at 30 fps.
The attached has been cropped to preserve the line while reducing the picture to fit IIS allowed size, makes the line difficult to see.
If a reply is received from the manufaturer I will report it in IIS.