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Hi,
I realised, that since i haven't used wide agnle lens before, i tend to get bend horizon on my images.
Not exactly sure what part of the settings i mess up. Too wide aperture or what?
Good example is my church yard picture flickr.com/kasaari is the image called Church by night, also on the week 42 assigments.
Would love to get hold on that issue =)
And one thing popped to my mind...since i was before trying to catch some auroras....my focus was in infinity....and i just then didn't change the settings at all for this image
I think its not you, it is the lens.
I think you are referring to the distortion a wide angle lens has. That is common at wide angles.
See this chart.
If you are using LR to PP I believe it has a function that can correct this if you so choose.
http://www.the-digital-picture.com/R...istortion.aspx
FYI, on FF it starts becoming noticeable below 24mm.
Look at this sample at 11mm
http://www.the-digital-picture.com/R...omp=0&Lens=977
VS 24mm
http://www.the-digital-picture.com/R...3&CameraComp=0
Hmm, i think i even used the lens correction to the picture. Gotta look that picture again in LR to see if i can straighten it up. Before getting that lens i read about the review and saw that distortion part also.
The lens i am using is Sigma 10-20mm f/4-5.6 EX DC HSM and looked up the picture and yes had used the lens correction for it also.Quote:
Originally Posted by HDNitehawk
Not any lens has the supported correction
Yeah, seems that just need to bit look what photoing with that lens.
You can fix the distortion manually in light room, but you end up losing part of the picture when you crop it to get back to a standard square or rectangular shape. At that point it defeats the point of using a wide angle. I believe you can repair the trapezoidal effect after repair in PS, but it has been a while since I have done it to tell you how. Best to down load the lens data and let the software do it for you if you can... I believe you can do that in Canon's DPP.
To reduce the distortion, try to put vertical lines or horizontal lines that you do not want distorted as close to center frame as possible, and then straighten (or partially straighten) in post processing. Not always the best composition, but neither is the distortion sometimes. It is all about give and take to come up with a good balance.
As an example, I run into this distortion with lighthouses. Good composition would put the lighthouse off center to one side or the other. But then, it leans inward due to distortion. So I move it a little more towards the center, and leave a little room to straighten and crop the composition to what I want in PP.
At 24 mm, I find it quite noticeable in the situation described above, and I plan accordingly. Or ignore it... there are many that do not seem to mind the distortion.
Pat
Take a look at this video, LR has many tools to fix all types of distortion.
https://helpx.adobe.com/lightroom/ho...orrection.html
There is a difference between the distortion that comes from the lens itself and distortion that comes from the perspective you shoot.
Do not confuse the two.
Of course all of the above is good advice.
I think the issue of perspective is also part of what Karsaa might find troubling about the recent picture of the church. Small changes in angle of the camera make big differences in perspective with wide angle lenses.
I would like to pose a further question on the issue of managing vertical perspective. For purposes of this discussion assume I do not own a TS lens, since I don’t!
To take a picture of a vertical object ( like the light houses already mentioned or the tower attached) one could get closer, angle the camera upward to fill more of the frame and then correct perspective in software. There is some loss of detail in the areas that the software expands. That is what I did in the example attached.
https://farm6.staticflickr.com/5784/...5a28ca77_z.jpgtower by Danny Watson, on Flickr https://farm1.staticflickr.com/740/2...1b0c7514_z.jpgTower 2 by Danny Watson, on Flickr
Alternatively one could move farther back to get the camera horizontal, fill less of the frame with the object and then crop/ enlarge. That loses some detail, too.
Either one carried to extreme does not seem optimal.
How do you experienced guys decide how close / how much vertical angle to have in the original image?
I was wondering, how much of that distortion on that church picture comes from the fact that i forgot it to the infinity?Quote:
Originally Posted by HDNitehawk
I think I know this one!
The focus set to infinity has made the foreground softer. (Possibly a good thing, depends on what you wanted.) That would NOT cause other types of distortion.
The camera axis was pointed slightly upward, causing some convergence of vertical lines toward the top. It also had a slight horizontal tilt compared to a strong horizontal element like the church roof. Those can be fixed in several editing programs, with small loss of image detail.
I would say none.Quote:
Originally Posted by Karsaa
I have never seen or read an article that would tie to the two together.
I toyed around with LR's tools and got the picture somehow more straight. I think i also had not totally parallel camera angle when shooting. Well, atleast i know now to be carefull with the lens =)