antoinebar Posted December 20, 2017 Share Posted December 20, 2017 Hello everyone. I recetly bough a Epson v850 scanner, to be able to scan my 120 films. Unfortunately, i have until now a pretty annoying problem, as we notice huge vertical bands, specially in the dark areas, with both silversfast and epson scan softwares : Do you think that it just comes from the fact that the film is not so flat, or a more complex hardware issue ? Thank you in advance for your feedbacks. Link to comment Share on other sites More sharing options...
rodeo_joe1 Posted December 20, 2017 Share Posted December 20, 2017 It looks like processing streaks. Can you see it on the film itself? If it's coming from the scanner the obvious solution is to return the scanner for replacement/repair. The film looks very underexposed too, and that won't help. Link to comment Share on other sites More sharing options...
Tony Parsons Posted December 20, 2017 Share Posted December 20, 2017 Can you post a larger image of just one frame please ? Link to comment Share on other sites More sharing options...
Ed_Ingold Posted December 20, 2017 Share Posted December 20, 2017 Dust on the scanner sensor will cause blurry streaks in the direction of travel. They become more prominent if the negative is under-exposed, because the scanner software attempts to set the exposure accordingly. Streaks in the film due to processing tend to be broader, and may "tail" from particularly dense parts of the image. Link to comment Share on other sites More sharing options...
digitaldog Posted December 20, 2017 Share Posted December 20, 2017 Dust? Not as likely as an issue with the stepper motor. Difficult to see with that example. Make a scan with NOTHING on the bed, maybe set levels so it's a mid gray. Then we can see the entire scan of the bed area. Author “Color Management for Photographers" & "Photoshop CC Color Management" (pluralsight.com) Link to comment Share on other sites More sharing options...
JeffOwen Posted December 20, 2017 Share Posted December 20, 2017 As rodeo-joe says it looks to me like processing streaks. You could easily check this by scanning at right angles, although you may have to cut the negs to do this. These images were increased in contrast to amplify the defect. Link to comment Share on other sites More sharing options...
antoinebar Posted December 20, 2017 Author Share Posted December 20, 2017 Thank you for your answers. FYI, here is two frames with better resolution. But, as suggested (don't know why I did not though about it before), I did an empty scan, and, with the restricted area of the 120 frame, here is what i get, after tweaks to increase the visibility of the bands: So it is clear that it does not come from the film/holder, but from the scanner itself. It is pretty annoying, as i bought the scanner from a particular. Hopefully I still have an available warranty. Do you have still an idea about where it can technically come from ? It can help me if I have to demand a repair/replacement. Thank you [EDIT] and yes, the film was underexposed ... as this was my first try with my Yashica :P Link to comment Share on other sites More sharing options...
antoinebar Posted December 20, 2017 Author Share Posted December 20, 2017 Dust on the scanner sensor will cause blurry streaks in the direction of travel. They become more prominent if the negative is under-exposed, because the scanner software attempts to set the exposure accordingly. Streaks in the film due to processing tend to be broader, and may "tail" from particularly dense parts of the image. FYI The scanner is pretty new and has almost never been used :/. Is your explanation still relevant ? Link to comment Share on other sites More sharing options...
Ed_Ingold Posted December 20, 2017 Share Posted December 20, 2017 Is the negative underexposed? If so, there is less contrast between the image and the substrate. This difference is amplified by image processing. This is easily demonstrated by scanning an unexposed part of the time, such as the trailing leader. Link to comment Share on other sites More sharing options...
antoinebar Posted December 20, 2017 Author Share Posted December 20, 2017 Is the negative underexposed? If so, there is less contrast between the image and the substrate. This difference is amplified by image processing. This is easily demonstrated by scanning an unexposed part of the time, such as the trailing leader. Yes, as i said it is !! And a scan without any folder and film also has these light regularly bands. But i cannot imagine that it is a normal behavior. Link to comment Share on other sites More sharing options...
digitaldog Posted December 20, 2017 Share Posted December 20, 2017 Yes, as i said it is !! And a scan without any folder and film also has these light regularly bands. But i cannot imagine that it is a normal behavior. Can you post an example of the scan without any film/print that's close to middle gray? Author “Color Management for Photographers" & "Photoshop CC Color Management" (pluralsight.com) Link to comment Share on other sites More sharing options...
rodeo_joe1 Posted December 20, 2017 Share Posted December 20, 2017 If the direction of scan is vertical (as we view it here), then the bands could come from dirt or smears on the CCD sensor, or on the travelling tube light source, or on the mirror. This may or may not be the case and relatively easy to remedy, but will almost certainly require dismantling the scanner. Easiest option is to return it. Link to comment Share on other sites More sharing options...
antoinebar Posted December 20, 2017 Author Share Posted December 20, 2017 Can you post an example of the scan without any film/print that's close to middle gray? What do you mean ? I am a true beginner, but when we have no film, the result is all black right ? :confused: Link to comment Share on other sites More sharing options...
digitaldog Posted December 20, 2017 Share Posted December 20, 2017 What do you mean ? I am a true beginner, but when we have no film, the result is all black right ? :confused: Just pull a curve in the scanning software. Author “Color Management for Photographers" & "Photoshop CC Color Management" (pluralsight.com) Link to comment Share on other sites More sharing options...
antoinebar Posted December 21, 2017 Author Share Posted December 21, 2017 here it is (I scanned the whole scanner area). It appears so strong. It clearly cannot be neglected :(... Link to comment Share on other sites More sharing options...
digitaldog Posted December 21, 2017 Share Posted December 21, 2017 Doesn't look good. Now you see why it shows up in the image scans. I'd look into service or return if that option is possible. You can't expect fully smooth, solid tone from such a scanner but there's more going on there than a few flakes of dust! Author “Color Management for Photographers" & "Photoshop CC Color Management" (pluralsight.com) Link to comment Share on other sites More sharing options...
JDMvW Posted December 27, 2017 Share Posted December 27, 2017 FWIW I get horizontal streaks in scanning on a Canoscan 9000F if there are ambient "light leaks" creeping around the edges of the scanned areas. Are bright lights near the scanner? Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now