I need to correct distortion from my 18-200 mm lens for my Nikon D80.
I can experiment with the controls until I get what looks reasonable,but it would be easier if I could find recommendations for settings of the lens distortion filter at different focal lengths for the lens.
I used to use a Panorama Tools plugin for gimp for which I found such recommendations, but I can't get that plugin to work with recent versions of gimp.
Of course I can experiment by photographing a grid at different focal lengths and different subject distances and using trial and error, and create my own tables.
Finally, where can I find a description of the the algorithm that the filter uses. If I had that, it might simplify things. Usually these algorithms apply a polynomial (usually cubic) correction based on the radial distance from the center of the image. The parameters set the coefficients of the polynomial.
There used to be a pnorama tools plugin which allowed one to entercorrections for specific lenses which I was able to find on the web.That worked very well. But I haven't been able to find that plugin forrecent versions of gimp.
There is a lens distortion filter, but you have to use it by trial anderror. I haven't found any specific recommendations to use forspecific lenses anywhere. And in some cases, nothing I try works. Iattach an example below. It was taken, I believe with a Nikon 18-55 mmlens at 18 mm. You will notice that there is no distortion at thesides but significant barrel distortion as you move in from the sides.No combination of major and edge correction that I've tried does anygood.
P.S. I understand that ahd I shot raw with my Nikon, I might havebeen able to do the correction more easily using ufraw. Also, it mightbe possible using hugin to correct the distortion. But I would like tobe able to do it with gimp if I can.
Lens correction, and therefore vingette does not apper in my distort filter drop down menu in cs5? can I put this in to this filter or is it somewhere else.
LightRoom and Camera Raw have profiles for Lens Correction and all the current available lens are in the list for the Canon 6D raw files. BUT the Filter/Lens Correction when in Photoshop CS6 only have 2 Tamron lens listed. Odd that there are lens profiles for the Canon 6D raw files in Lightroom and Camera RAW but not CS6 Filter/Lens Correction.
Camera RAW, LR and PS are up to date..... NOTE: I have a Canon 7D, G11 and 1D Mark II N and all their files work as expected. It's only RAW files created by the Canon 6D.
I remember seeing a video tutorial on fixing lens distortion but I don't remember that video is and who did it. how to fix lens distortion in Photoshop CS4? I shot the photo with a widen angel 24mm Nikon lens. The picture looks somehow distorted.
I'm trying to correct the distortion caused by a wide-angle lens in Premiere CS6. From what I can tell, there is no filter or transform / distort feature within Premiere itself. I followed the steps in this tutorial to open the MPEG4 in Photoshop, apply the lens correction filter, and then export the video again to be re-imported to Premiere. URL....
However this tutorial is for CS5. I am seeing no adjustment or filter layer in my layers panel, as it appears in the tutorial. When I go to export the video, it seems the Adaptive Wide Angle filter or the Lens Correction filter has only applied to a single frame of the whole clip. Bummer.
With any lens, there is an inherent distortion. I've seen grids at photozone.de in their lens reviews. If possible, I want to use Photoshop to create the same distortion my lens would create. For example, if I photograph a sheet of graph paper, the result would be a distorted grid. Can I get photoshop to take an UN-distorted grid, and distort it in the same manner? How complicated is this, if possible?
I am facing problems while 'stitching' the panoramic photos that i shot. basically, Photoshop's File>Automate>Photomerge and Edit>Auto Align/Blend Layers works good, but FAIL on the LENS DISTORTION.
i had tried to correct it with Filter>Lens Correction, but still not getting perfect result. see the attached image for the results, were you can see the building looks bent. check/download the source images from [URL]......
I tried to use the lens flare filter in Photoshop CS6.While the lighting effect is interesting, it introduces ugly artifacts like blue or orange blobs (which are supposed to be the reflection of the diaphragm, but do not look anywhere close to that, but instead are just cheesy looking blobs of color).
In the "movie prime" setting blue lines are added which have nothing to do with lens flar.On top of it, the preview is about the size of a stamp. Any way to use the filter without getting these artifacts, or is it - what I assume - just a useless toy filter, that has probably been dragged on for years and years because it's always been there? What do you use to create a lens flare effect? Are you just building it from scratch with brush work?
My lens profiles in the distortion correction list are small. I looked at the official list and mine is not right. I only have one Tamron lens profile. Nikon and Canon only have about 6 lenses each. What gives?
I am trying to create a circular graphic that is similar to a race track turn with banking. Is there a type of distortion filter or 3d that I can use that can create the feeling of a vanishing point that bends around a turn?
I have CS6 with the most recent updates and RAW 7.1.
First: When I crop an image (I am using the new crop tool), and I make sure I have cropped it (hit enter after adjusting the box), if I then try to use the Lens Correction filter, it will not load the cropped version of the image but only the uncropped version. (CS5 did NOT do this). This makes using the Vignetting tool impossible to use, since when the image gets sent back to the main PS window, it shows up as cropped again, and the area corrected is out of range! The only way I can now use the tool is to save the cropped image to a new file and then open it up in a new PS window and THEN edit it with the lens correction filter.
Second: When I was trying to open and process some RAW files today, whenever I used the sharpening tool, it would preview just fine on the RAW window, but when I opened the file after finishing my adjustments, all of the adjustments would still be there EXCEPT the sharpening and NR ones. It did not matter if I saved the image to different file types, or opened it directly; the adjustments made with that set of tools were lost outside of the RAW window. This is definitely not the way CS5 worked.....and it seems like a bug.
Third: I know this is not a bug, how to change what the files do, since I can't find where to set this. When I open a JPG file, if I do any work to it at all, it then automatically gets saved as a PSD file unless I select JPG from the pulldown menu. How in the world can I get this pulldown to NOT automatically go to PSD when I am working with JPGs? It is an extra step that just gets in my way.
I have a Window Vista64 Intel Core2Quad CPU Q7600 processor machine with 6GB RAM and a Nvidia GeForce GT 430, with the latest updates.
I think that ACR uses same lens correction profiles with the filter in PS.
There is only one profile for Canon EF 100 mm f/2.8 L Macro IS USM, but I get two different results when correcting in PS and correcting in ACR (default lens correction mode).
My pc crashed, upon reboot I'm unable to run PSCS6 lens correction filter. The error reads "The end of data was reached while reading from a container". The crash occurred while using the lens correction filter, the pc locked up. When I rebooted everything worked fine except the lens correction filter.
It just consisted of a bottom layer and another layer with a fill.
I flattened the layers.
I then went to filter>distort>lens correction, because I wanted to introduce some lens distortion to the image - but the "lens correction" option was greyed out.
I tried doing this with another image and it was fine.
I'm unable to find a profile for my Canon 5D Mark III within the PS CS6 lens correction filter. In fact, Canon isn't even available as a camera make option within the Search Criteria box, nor are any canon lenses. When I click the Search Online button, the prompt reads "No online profiles found".
I have no problem within Light room 4 (the Mark III and lenses are recognized)-- however, I'd really like to be able to use the new Adaptive Wide Angle Lens filter within CS6, which needs the camera's EXIF data to function correctly. I'm using a new i Mac OS X.7
I created this using Gimp 2.6 on Mac 10.5: [URL].......
When I resize this to a smaller image, the text gets all distorted: [URL]......
I have been looking around on Google, but couldn't find much.Tried scaling with all the different ways (Linear, Cubical... etc). Also tried scaling from XCF and PNG files. Nothing seem to maintain the quality of the text on the image.
I wanted to try out was to make a logo fit a sphere, in particular a picture of a lens. Was hoping to get that magnified effect to the logo, I'm trying to make a film society where I live and figured this would make a good poster .
A few nights ago I made a couple of pictures on a tripod of my city by night. Unfortunately there is a lens flare visible on all of them near street lights and I want to remove it. However I've ran into a problem since cloning and repairing isn't suitable since they aren't on a even surface and the Free Selection; Colour -> Components -> Channel Mixer method is making awfull colours in the corners near the lamp. (mostly visible on a selection border which meets the lamp area at an angle of approx 45-90 degrees) This problem probably is because this part of the picture hasn't got an even brightness due to the lamp.
I am using Gimp version 2.6.11 under Mac OS X version 10.4.11.
I am having a problem that is driving me to distraction: When I close a file and open it again, it is impossible to edit the text. Please note that before saving the file, I have no problems editing the text--so I have already passed hurdle.
It wouldn't be so bad if it was just a word or two, but I am in a situation where I will have to delete several paragraphs of text and re-type them in order to fix a small typo. With my typing skills, it is likely that I will make another typo in the process. And, of course, I don't remember what font I was using, or the type size, etc. etc.
