Use Lens Correction or Transform/Skew for Vertical Perspective??

I recently visited the Redwoods in California and took many photos of trees with a wide angle lens, which as you know causes the trees to bend inwards. I have tried using both Filter/Distort/Lens Correction and Transform/Skew to attempt to correct the problem. It is my observation that Lens Correction reduces the number of pixels by producing a trapezoid shaped image with the sides slanting inwards. Skewing does the opposite: increases the pixels by creating a trapezoid with the sides slanting outwards.
What are the pros and cons of using each method to correct vertical perspective? How will the image quality differ with each method? Thanks!!

Anthony,
Click on the link to see this short QT video tutorial:
http://photoshopnews.com/wp-content/uploads/2009/05/psn-perspectiveacr-low.mov

Similar Messages

Do I need to use lens correction in lightroom 5 if I have it enabled in camera ?

Do I need to use lens correction in Lightroom 5 develop module it I have it enabled in camera ? (Canon 5D3)

Thanks very much John, I noticed when I applied it in LR5 it made a difference, but I guess what I was asking was it being applied twice, and as I shoot in raw you have answered my question, thank you so much.
Phil.
Date: Tue, 31 Dec 2013 06:23:10 -0800
From: [email protected]
To: [email protected]
Subject: Do I need to use lens correction in lightroom 5 if I have it enabled in camera ?
    Re: Do I need to use lens correction in lightroom 5 if I have it enabled in camera ?
    created by Tooslow2007 in Lightroom for Beginners - View the full discussion
Your camera will only apply lens correction (if switched on) to JPEGs, not to RAW files. Clearly you do not want to apply it twice.
John
     Please note that the Adobe Forums do not accept email attachments. If you want to embed a screen image in your message please visit the thread in the forum to embed the image at http://forums.adobe.com/message/5968950#5968950
     Replies to this message go to everyone subscribed to this thread, not directly to the person who posted the message. To post a reply, either reply to this email or visit the message page: http://forums.adobe.com/message/5968950#5968950
     To unsubscribe from this thread, please visit the message page at http://forums.adobe.com/message/5968950#5968950. In the Actions box on the right, click the Stop Email Notifications link.
           Start a new discussion in Lightroom for Beginners at Adobe Community
For more information about maintaining your forum email notifications please go to http://forums.adobe.com/thread/416458?tstart=0.

Using lens correction in CS5 changes default file settings

When I use lens correction in CS5, it switches the default file format from jpg to pdf.
Now, that is simple enough to change back for a file or two, but it really messes up any worf flow. Batch processing using an action cannot include a simple "save" because due to the change in format it goes to "save as" and then every file would get named as the first one. If I just choose save and close in the batch options, the dialog to change file types opens after every file and it becomes a hassle. Is there a way to deal with this in a better way? Or is this just a matter of the trial version of CS5?

Hi Joel,
Are you talking about the lens correction batch script as invoked from the File>Automate>Lens Correction...? Can you describe your steps to reproduce the bug?
Thanks,
-Simon

Lens correction profile (or planned) for Samyang 24mm f/3,5 TS?

hi all,
Is there a lens correction profile (or planned) for Samyang 24mm f/3,5 TS?
thank you for reply

I don't believe Adobe has provided lens profiles for any tilt-shift lens. There are simply too many possible combinations of settings that affect distortion and vignetting. In addition I believe this lens does not include the aperture setting in the image file EXIF data, which is required for proper correction of vignetting.
You have two possible options:
1) Use the Adobe Lens Profile Creator to create lens profiles for each shooting aperture. You'll need to record or remember your shooting aperture to use them, since there is no 'Aperture' EXIF data. A separate lens profile will need to be created for each each shooting aperature, shift, and tilt setting combination that you will be using. I would try to keep the combinations to a minimum.
2) Use the LR Lens Corrections> Manual> Distortion and Lens Vignetting controls to create Develop presets for specific lens aperture settings. When using the lens tilt or shift function you may also need to include a Graduated filter(s) with Exposure compensation, since the vignetting will not be symmetrical (i.e. light fall-off in direction of tilt & shift). Keep in mind that the lens distortion may also become assymetrical when using tilt or shift.
So you can see the complexity of trying to create a lens profile for tilt-shift lens.

Add the option to always use lens correction

I find that I almost always use Lens Correction.
Could you please add an option to Always Use Lens Correction.
Thanks

Glad to hear you have it working. Setting your own defaults is a powerful feature.
By mentioning the things above I've been trying to help you avoid some of the additional potholes we've all run through, as well as trying to make a point that if you give attitude, you get attitude. By contrast, if you ask nicely you tend to get nice answers.
Perhaps it's not clear that most of us are here - Molly, myself, and a bunch of others - because we genuinely like helping other folks. While everyone understands you may be feeling frustration, turning the process of interacting on the forum into a nasty thing isn't appreciated by anyone. I'm sorry that you felt some frustration in return at my answers.
So... Now that we understand one another, let's just wipe the slate clean and move on.
-Noel

LR4 Beta...another problem with using Lens Correction

Not sure if it's me or the beta. I'm trying to do a lens correction on a file that was edited in CS5. The photos were taken in 2009/10. They are importing as Process 2012.
I'm using the Lens Correction in manual. About 15 seconds after I start using the sliders, my LR stops working and I have to close the program (white outs the screen with the note saying the program has to be closed).
I do know there can be problems with a beat so I wanted to post this problem in case it is a bug in the system.

I have the same probem if I try to push the scale slider down below about 87%. It is quite annoying when it keeps happening on the same photo. It's not something I use a lot but it can be necessary with tall buildings when the correction pushes the top out of the frame.
JW

Lens corrections : auto-correction for rectangular subjects

I have used lens corrections manual "vertical"+"horizontal"+"rotate" sliders
to render rectangular paintings shot off-axis (transform trapezoids into rectangles).
Very cool - but time consuming !
My request is an auto-correction for rectangular subjects :
set rectangular mode, click pointer on each corner (4), hit enter and "voila" :
"vertical"+"horizontal"+"rotate" sliders auto-adjust !
(I think there's only one solution to the problem)
Do I have any support ?

Just for "fun",
take an off-center picture of a rectangular poster
and monitor how long it takes to get a good enough
rectangular view in LR3 (cropped).
Can be played with friends... !

Community lens correction works for me

A few days ago lens correction profiles showed up for my D300 with both 16-85VR and 55-200VR lenses. Brick wall testing indicates they seem to have nailed distortion/CA/vignetting, at least for focal length extremes.
So how do we know where these profiles originated, if for no other reason than to give credit?
Richard Southworth

I can think of one really good reason why a lens profile should be camera-specific for the best possible results:
Not every sensor responds the same to light coming in from various angles. Microlenses, for example, are different from sensor to sensor.
So the vignetting profile for one camera might be a general improvement on another, but it may not produce specifically accurate results on that other camera.
You cannot oversimplify the problem and achieve perfection.
-Noel

Lens correction profile for Samyang 16mm f2

Is there a lens correction profile (or planned) for Samyang 16mm f2 lens - ideally for Canon 7D - please?
I'm trying to avoid having to create a profile from scratch.
Thanks

I see that lens listed in the release notes for the final Lightroom 4.2 update that just came out a few hours ago, so it looks like the answer is to download the update.
http://blogs.adobe.com/lightroomjournal/2012/10/lightroom-4-2-now-available.html

Why is my new imac i7 (os 10.6.4)crash every time I am in CS5 using filter tool-lens correction?

In the middle of using lens correction tool or noise reduction filter, my new imac crashs, I have lightroom sometimes on, and Firefox brawser with music streming, any ideas why?

Maybe updating might help as you seem to be behind with the OS and don’t even mention Photoshop’s exact version.

Erratic behaviour of Manual Lens Correction in Develop Module

64 bit Windows 7
Sometimes - not always - using the manual lens correction, with Constrain Crop activated, leads to the image jumping around very quickly and erractically and it being impossible to achieve fine control using the mouse: tiny movements of the slider by dragging with the mouse result in large jerky movements of the image. I have only used this for correcting converging verticals and cannot comment on the other adjustments.
Moreover, on a subsequent crop when this has happened, it may be impossible to crop as you would like using the crop tool - the top edge of the image jumps above the intended crop outline. The only way to get the crop you want when this happens is to adjust each edge individually, rather than by dragging the corner.
Apologies if I have not explained this well. In short, it seems to be a bug whereby proper mouse control of the lens correction is lost. I often correct converging verticals in buildings and have never seem the same behaviour in version 3. I cannot always replicate it in version 4, but it happens a lot.
Hope this feedback helps. I cannot see that it has been reported elsewhere in this forum.

Hmmm, this is going to be tricky. I just tried to replicate it on two photos on which I know I had the problem, by going back to the original import setting, but both behaved fine this time! Both, as it happens, were portait format, having been rotated 90 degrees counter-clockwise from the original. I cannot recall, I am afraid, whether or not other ones with which I had an issue had been rotated first. I will try to replicate and keep more detailed notes. In at least these two instances, I had not applied a lens correction profile first. The vertical transformation slider would be set to somewhere between -25 to -35.
Having played about with this for a while now without full replication, I have one idea which may or may not be correct. When I reset the Develop settings and started on the Lens Corrections first, absolutely nothing untoward happened. Now I have gone back and done a number of other adjustments first (as I would often do, before correcting the perspective). In this case, the vertical adjustment slider seems more sensitive to small mouse movements - definitely discernible, but not nearly as bad as the examples I have seen previously when I was not looking for them, nor is there yet any sign of the cropping problem. Maybe the effect becomes more pronounced as the number of edits accumulates before applying the manual Lens Corrections. If this is correct, I do not know whther the effect is cumulative across all edits to all images (as if memory is not being released - but that should not be a problem, since I have 12GB of RAM and nothing else running) or whether it is a per image phenomenon, since I have only recently re-opened Lightroom. You will know better than I whether this is a possiblity, but it is just a thought as I play with this without so far being able fully to replicate the issue. I have some work to do on a number of images and if I get time, I will come back to these images to see if the problem manifests itself more clearly after a larger number of edits across multiple images in a single session without closing Lightroom.
I am very sorry this is so vague and quite speculative. I hope I will be able to give you more accurate feedback later.

CS2 question Filter- Distort- Lens Correction

Comrades...
When using the lens correction pane (Filter-> Distort-> Lens Correction) in CS2 I have never been able to use the hand tool to move a scaled (or not) image within the preview window. It just doesn't function.
eg., when correcting for vertical perspective the upper portion of the image is "cropped" by the top of the preview window and additional transparent canvass appears at the bottom. I'd like to pull the image down to center it but alas... no functioning hand tool.
Is this tool just broken or am I doing something wrong? Thanks in advance for your advice.
(Intel and older G4 mac- same problem)
d

What I think you're looking for is a Move Tool not a Hand Tool.
The Hand tool is for navigating in an image. It doesn't move the pixels around.
The Move Tool is for actually moving the pixels around on the canvas.
There appears to be no such tool in lens correction.
DLS

Lens Correction and Cropped Pixels

I'm starting out as an architectural photographer, and as I don't yet have a perspective correcting lens to adjust images in-camera, I need to use the Lens Correction tools in Photoshop and ACR. I prefer to use them over the Free Transform tool for the sake of accuracy (and convenience), but I do have an issue with the tools. When I correct the perspective of an image and then process, whatever extends beyond the boundary of the canvas winds up being automatically deleted, and it seems as if there's no setting to prevent this from happening. As there is sometimes a piece of a photo that I would like to be able to retain (i.e. extra sky, the top of a building, etc.), I understand that I can scale down the image in the Lens Correction tool and then re-crop after processing. Of course then this causes the image to still be smaller than I would like it to be (in certain cases where the distortion correction is more extreme, an original 21MP photo might become a 12 or 13MP photo after processing in the Lens Correction due to scale-down).
Is there any way that the Lens Correction tool will allow for pixels extending beyond the boundaries of the canvas to remain uncropped, thus allowing me to expand the canvas in order to reclaim the extra information?

Yammer P, yes the list is shorter because it's a jpeg rather than raw, and we have more profiles for raw than for jpeg.
For the set of lenses supported in CS5's initial release, we created profiles for both raw and jpeg. Since then, we have been concentrating on raw-based lens profiles, for a number of reasons (one of which is that we feel we can consistently deliver the highest quality results this way). This is why you see some lenses supported with raw & jpeg profiles, but many more supported with raw only.
CS5's Lens Correction plug-in does indeed let you choose raw-based lens profiles even though it is processing a rendered file (e.g., jpeg, tiff). This will work in many (but not all) cases for distortion correction, but will often work poorly for chromatic aberration and vignette correction. I don't recommend this workflow and it is a key reason we don't let users mix/match in ACR & LR.
Eric

Something Strange with Lens Corrections

I used lens correction on an virtual copy of a DNG image. The image is of a building and I used a slight negative rotation to correct the perspective. After editing the image in LR3, I exported it to PS CS5 with the LR edits. So far so good. After some minor edits in PS I saved the edited PSD file and it shows up in LR. Still good. The problem occurs when I make a virtual copy of the PSD file in LR. Everything looks the same EXCEPT the lens correction seemingly reverts back to the original raw file.The crop that was part of the original lens correction is retained, but not the rotation. What is even stranger, this anomaly becomes apparent as soon as the virtual copy is created in the Library Module, but if I go to the Develop Module with the PSD virtual copy and select the BEFORE & AFTER view, the correct lens angle appears in the BEFORE and the skewed angle for the AFTER. I have tried everything I can think of and cannot figure out if it is me or the program. Any ideas?

As I try to replicate the problem, it the "unstraightening" seems to occur when I do the export, with LR adjustments. It appears that PS CS5 is retaining some of the settings from LR3, but not all. The crop remains (which is why I thought the image was initially OK back in LR), but the Lens Correction is reset. I just did a search and found that other people have been experiencing similar problems LR3 edits not being retained after working through the external editor. The thread I found (http://forums.adobe.com/message/2891636) did say that manually saving the XMP file is a work around, which I will try when I have time later. Thanks for all your input yesterday! I will report on what I find out.

Lens Correction Profiles: Pasting develop settings in bridge yields inconsistent crop

Hello Everyone,
I recently discovered lens correction profiles which have been a real benefit to me in my most recent batch of images shot at 16mm on a Canon 5d MII. The lens distortion isn't always spot on, but it is a huge headstart most of the time.
I bracket photos for HDR and will apply all my crop settings to one image in the bracketed series and afterwards psate the settings onto all the others in the series. This works great.
However, once I started using Lens Correction Profiles, when I paste the crop setting onto the subsequent images, the crop is in a different position. I was completely baffled. But after some fiddling around, I noticed that if I manually open each of the subsequent images, remove the crop, uncheck and recheck the Lens Correction Profile, and reapply the crop, it is consistent with the first. This leads me to believe that somewhere in the Paste Setting sequence, it is doing the crop out of order. (As if it is cropping the image and THEN applying the lens correction--which yeild different results.)
(As a item of note, when I mean cropping, I use the automatic crop obtained by highlighting the entire area of the image after applying lens corrections so as to only crop out the grey areas acquired by shifting the image around while still maintaining aspect ratio.)
Is there any way we can get the pasting to paste so as to make these subsequent images identical to the original image? Or am I missing something?
Relevant Specs:
OS: Windows 7 Professional 64-bit
Bridge 4.0.4.2
Adobe Camera Raw 6.4.0.139
Photoshop 12.0.3 x64
Thanks,
Dave

Normally, when you apply a lens correction profile, there shouldn't be any visible gray areas around the border of the image.
Are you saying this is not the case?
Are you making additional distortion or keystoning adjustments (e.g., in the manual tab)?

Use Lens Correction or Transform/Skew for Vertical Perspective??

Similar Messages

Maybe you are looking for