stric1975 Posted December 18, 2018 Share Posted December 18, 2018 (edited) Hello, recently I've had some Portra 160 developed. There were 5 rolls of film and on 3 of them a problem occurred on each frame (see an example below). A thin horizontal line runs across all scans. I can't see it on the actual film. Could this be a problem with the scanner that the lab is using? No B&W films were affected. None of the films was cut, and I don't know what scanner or process they used for scanning. Or... is this a problem with the camera? Thanks Edited December 18, 2018 by stric1975 Link to comment Share on other sites More sharing options...
peterbcarter Posted December 18, 2018 Share Posted December 18, 2018 It looks like the scanner had a bad day. The line is definitely artificial, likely a side effect of ICE. A rescan is in order. 1 Link to comment Share on other sites More sharing options...
Sandy Vongries Posted December 18, 2018 Share Posted December 18, 2018 Possibility? link Lomography - Making Those Annoying Horizontal Lines on Your Photos Disappear Link to comment Share on other sites More sharing options...
Ed_Ingold Posted December 20, 2018 Share Posted December 20, 2018 It could be a bad cell in the scanner, or dirt directly on the sensor. ThSince it appears in the same location parallel to the long edge, it is consistent with the film being scanned laterally, parallel to the short edge while the film (or scan head) is indexed along the long axis. The ghost or shading on either side of the line is probably due to image processing, such as JPEG converson. ICE produces artifacts, but more random in nature. Link to comment Share on other sites More sharing options...
rodeo_joe1 Posted December 20, 2018 Share Posted December 20, 2018 3 line scanners use a nominally 'blank' area of the film-holder or platen to calibrate themselves against the full brightness of the scanning lamp. The calibration is pretty much done on a pixel-by-pixel mapping basis, which compensates for any imbalance in the light across the frame, scanner lens vignetting, and high or low output photosites. As a consequence, a speck or two of dust in the calibration area can result in just such a stripe as is shown. It could also be caused by dust on the tri-linear sensor, but less likely that simply dust on the glass platen. Rescans are in order, after someone cleans the scanner. 3 Link to comment Share on other sites More sharing options...
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