KillingTime

Had another play around with the camera this evening and found the problem. The CS lens screws into a silver threaded adapter that in turn screws into the camera body. The silver adapter is held in place by a grub screw. See below. By undoing the grub screw you can rotate the silver adapter and that alters the lens to sensor length. It only needed a few turns inwards in my case. The lens controls are now facing the bottom and not the top though. Not a huge issue. Thanks for the replies.

Tried a spacer ring and the lens wont focus at all. I assume all 2.8-12 varifocal lenses don't look this way then... If not I'll buy something else. Thanks.

Hi, Just purchased a CCTV camera with a Sony IMX317 sensor and a 2.8-12 C mount lens. Brand is 'ELP'. At nearly all focal lengths there are dark patches at the edges of the image. See attached. These edges disappear when you zoom in (10-12mm). Has anyone seen this issue before and know what causes it? The lens has 1/2.5" printed on it, and the IMX317 sensor is listed as 1/25" also, so it's either; 1) A badly made lens, or 2) The lens it mounted incorrectly (it is screwed all the way in), or 3) All 2.8 varifocal wide angle lenses look like this. This normally happens if the sensor size is larger than the lens is designed for, so the focused image is smaller than it needs to be. I have no reason to suspect the sensor as it outputs QHD at 30fps. It probably is an IMX317, which leaves the lens, or the mounting distance. I know that these types of lens also come in 'HD' and '3MP' variations (mine isn't either), which presumably means the optics are better, but that shouldn't cause the dark edges AFAIK. Thanks.

Thanks.

>>wow, skip fodder Yes, they were free. D/N could be Day/Night. Easy enough to check. turn the lights off and see if the image goes to black and white. BLC works like HDR. pictures here: https://www.cctvcameraworld.com/blc-hlc-wdr-in-camera-image-sensors/ BS - Black Stretch ??? Another Panasonic prop feature. - designed to make shadows and dark areas appear clearer in the camera view... ALC - ALC adjustment would control iris compensation for bright spots within the field of view... ELC - ELC compensates for moderate light changes in indoor applications without the use of expensive auto iris lenses. Presumably, ALC is best for outdoor scenes (wider light level variations), while ELC is better for indoors?

Hi, I've picked up a couple of old analogue (PAL) CCTV cameras. Panasonic WV-CF324. Manual attached. There are number of DIP switches on the camera. The manual uses acronyms to label them, but doesn't actually describe what they do. D/N - On/Off B.S. - On/Off B.L.C. - On/Off A.L.C. / E.L.C. Can anyone link to something that describes what these option stand for and what they actually do? Or if you know, why would you want to use each option. Thanks. WV-CF324E_Technical_Specifications1.pdf