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a lens defect which causes straight lines to be curved or bowed

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3
votes
4answers
318 views

Do the out of focus elements in this photo look normal?

I just shot this picture with my Canon T5i (75-300mm) lens. I zoomed from a distance to take this picture. As you can see, the focused area looks normal, but the grass that is out of focus looks ...
0
votes
2answers
68 views

Distortion Removal=Parallax Removal?

So, as the title suggests: does distortion removal caused by lenses means that the parallax is also removed from the pictures?
10
votes
2answers
143 views

What model does Lightroom use for lens correction?

I use Adobe Lightroom to remove the barrel distortion from GoPro images. Does anyone know if this software uses the Brown-Conrady model to achieve the lens correction? If not which model does it use? ...
1
vote
4answers
106 views

Does aperture effect the “depth” of faces in a portrait? Wide aperture make noses look shorter, wrinkles less pronounced?

Having a debate with myself that F/10 makes my portraits look better by making faces have less "depth." What I mean is I feel like wider apertures such as f/4 make my nose look longer and wrinkles ...
0
votes
6answers
122 views

What kind of lens do I need to get more of the scene into the frame?

I apologize for my lack of photography terminology. I am a beginner who enjoys taking pictures of my infant, and I would like to improve greatly. With the winter here and doing all my pictures ...
1
vote
3answers
126 views

Why don't smartphone cameras correct pincushion distortion automatically?

I've previously asked why the GoPro doesn't automatically correct for the fisheye distortion, and this question is related, but different: Given that smartphones have so much processing power ...
0
votes
2answers
72 views

Normal lens on cropped sensor camera and distortion [duplicate]

I'm a novice on photography, so I hope I can explain myself clearly. I have a Nikon D5100 (cropped DX sensor) with kit lens, 18-55mm. I'd like to buy a normal prime lens, getting faster shutter ...
1
vote
1answer
54 views

If a lens has a 4% Barrel Distortion, what does that mean for images?

I know what barrel distortion is, but how do I take a 4% rating and relate that to an image?
2
votes
4answers
340 views

Are wide angle lenses suitable for portraiture of children?

Wide angle lens tend to make faces more "chubby" than they appear otherwise, and are therefore not used often for portraits, unless the landscape is an important part of the frame. I'm curious as to ...
3
votes
3answers
178 views

Why do drones capture images that are curved at edges?

Every photos I have seen of drones taking images at high altitudes, had a kind of curvature at the edges of the photograph. I mean, I know the earth is round. But it is also huge, and IMO, you ...
2
votes
1answer
529 views

Auto Distortion Control - do I need it?

I couldn't find anything that would explain plainly what this is, and do I need it. I have Nikon D5300, Firmware version C - 1.00, L - 2.009, and it is with the kit lens 18-55mm VR II. First, what is ...
0
votes
2answers
932 views

Is distortion on an iPhone primarily due to perspective or does lens distortion play a part, and what can be done about it?

I am researching how to correct any facial distortions seen on an iPhone's front camera. Here is my current understanding of the issue: close-up photos will enlarge nearer facial features such as ...
0
votes
2answers
73 views

Image manipulation software to perform 2-D mapping to a 3-D surface [closed]

Is there any software that will assist me in the distortion described in 2 below. Another way of doing this is numerical, which is likely to be labourious, error prone, and exceptionally time ...
0
votes
1answer
39 views

Focal length of the sony DSC-H20 [closed]

I am working in finding the distance of the objects in a video taken using a Sony Camera model DSC-H20 and suppose that any lens or zoom distortions were applied. In order to know the position I need ...
1
vote
2answers
130 views

Software to change perspective of image of a whiteboard (or some other plane) to look 2D

Let's say I have a whiteboard in a room full of people. I want to take a picture of the whiteboard but there are people in the way so I can't take a picture of the board straight on. I'll have to ...
1
vote
0answers
74 views

How do I set a lens profile for post-processing distortion correction with an inverted lens?

Recently I started having fun with macro and micro photography by inverting a lens I have (24-85mm) and by combining 2 lenses togheter (70-200mm + inverted 28mm). The results are good (I shoot in ...
0
votes
0answers
278 views

How do I create the prismatic effects of the Android Fragment app with Photoshop?

The Android Fragment app creates interesting effects. Are there some plugins, tutorials, methods, etc. for doing this on a desktop (Photoshop or other apps), because the app only outputs low ...
0
votes
2answers
275 views

What causes barrel distortion?

Here are some scenarios for barrel distortion: When a target is too close to a camera, the photo will show barrel distortion. My flip cell phone's camera often produces barrel distortion. Some ...
1
vote
2answers
311 views

Which sensor “full frame” vs. APS-C (1.6 crop) gives more distortion?

Which sensor "full frame" vs. APS-C (1.6 crop) gives more distortion using the same lens? I mean, would a 10mm lens on a full frame camera show more or less distortion than if it were on an APS-C (1.6 ...
7
votes
4answers
652 views

Real estate photography: Low distortion lens VS high resolution lens?

Should one choose a (ultra wide) lens with the lowest possible distortion even though its resolution is not very good, over a lens that is very sharp, but has noticeable (barrel/mustache) distortion? ...
1
vote
1answer
2k views

How can I simply remove the fish-eye effect of my DJI Phantom vision 2 lens? [duplicate]

I'm searching a simple and cost-less way to remove the fisheye effect by: adding a material (additional corrective lens) or find the right software (free if possible) to remove the fisheye effect on ...
2
votes
0answers
155 views

How to disable automatic cropping that's done after distortion correction in DxO Optics Pro 9 or 10?

DxO uses so-called "modules" that apparently contain many lens parameters and they are implicitly used for correcting geometric distortion, and some other issues in pictures automatically. But the ...
5
votes
1answer
215 views

What do lens distortion data values a, b and c actually mean?

I've recently been looking at lens distortion correction solutions, and I just wonder what the values a, b and c actually mean. (I'm using Hugin/lensfun, I don't know if these are standard values or ...
2
votes
2answers
179 views

Is lens geometric distortion, chromatic aberration and light fall off still as much of an issue? [duplicate]

I saw an earlier question (Why prefer the 18-55mm and 55-250mm lenses vs 18-200mm?) that mentioned lower quality lenses have distortion, aberration and light fall off issues. Has software like Adobe ...
1
vote
1answer
69 views

Not quite straight lines; any help in Aperture?

This slightly bent sculpture is, I imagine, suffering from a bit of distortion. I thought that the raw processor in Aperture included lens data to correct this; the lens in question is a 55-200 ...
3
votes
3answers
2k views

Why doesn't the GoPro automatically correct for the fisheye distortion?

Automatic correction of various lens distortions is possible through specialized software that takes a few camera parameters and produces an output image free of distortion. Why don't most cameras do ...
1
vote
1answer
529 views

Is there a free application which can apply adobe Lens Correction Profile (.lcp) files?

Seeking a free and preferably open-source, ubuntu-compatible application that can apply Adobe .lcp files to remove barrel distortion. Any recommendations?
1
vote
2answers
890 views

Correct a fisheyed picture using Hugin

I've got a Olympus Body Cap 9mm fisheye lens for my Panasonic DMC-GM1 camera. I was told to use Hugin to correct the fisheyed pictures taken with that lens. When I import my pictures into Hugin, it ...
2
votes
1answer
195 views

Is 85-135mm really the best for every single kind of face?

They say that focal length around 85-135mm is the best for the head and shoulder kind portraits. I've done some tests myself, I can definitely see the differences. The face is more natural looking ...
12
votes
5answers
2k views

Photo stretched at corners?

Can anybody tell me why the heads of the two women are stretched in the corners? What is the name of this defect and how could one avoid it? I'm not a photographer (though becoming one is one of my ...
5
votes
3answers
152 views

How to make a panorama from pictures with distortion

I recently took the photos for a panorama in Chicago. Unfortunately, I didn't think the situation through properly, and I shot at a wide angle. When I first attempted to stitch the photos, I got this ...
2
votes
3answers
267 views

Webcam effect for Canon 5D Mark II

Is there any lens for a Canon 5D Mark II that can give the effect of a webcam? For webcam effect I mean: the subject can stay relatively close to the lens without barrel distortion large depth of ...
3
votes
3answers
226 views

What's the succinct reason for face-warping in wide angle lenses?

Is there an accurate way of explaining face-warping when using wide angle lenses? I realised I can't actually explain it without diagrams, so a succinct definition (no more than a few lines) would be ...
2
votes
2answers
183 views

I noticed high lens distortion with my kit lens; is this normal, and how to avoid this?

I recently bought a Sony NEX 5N with the standard 18-55mm lens kit and noticed today that it has a high lens distortion (see below). Enabling the option to suppress lens distortion in the setup did ...
7
votes
4answers
859 views

How can I check for damage to my lens from impact with a window?

I was taking a photo at an airport when I accidentally zoomed my Canon SX40HS into a window. The impact wasn't super hard, but there was a thump. I cannot see any visible damage, but how can I check ...
0
votes
0answers
95 views

How to transform image to be projected undistorted onto a sphere [duplicate]

I found this similar question: Is it possible to print a photo so it can be mounted on a globe? I do not believe the similar question is a "duplicate" because it is for a similar but different ...
9
votes
3answers
1k views

What's the term for wide angle lenses with no distortion?

Is there one word to describe the difference between wide angle lenses that have a circular distortion and wide angle lenses that produce images where perspective lines remain straight?
6
votes
1answer
2k views

How difficult is it to correct mustache-style distortion?

I am considering the Samyang 14mm Ultra Wide-Angle f/2.8 IF ED UMC but I am somewhat concerned about the 5.3% of mustache-style distortion this lens produces. I like most of what I read about this ...
3
votes
3answers
599 views

Is lens focal length specified considering the effect of barrel distortion on field of view?

Given a Nikon 14mm f/2.8D ED AF Ultra Wide-Angle Nikkor Lens on a full-frame sensor, in theory the field of view is HFOV: 104° x VFOV: 81°. However this lens exhibits noticeable barrel distortion ...
5
votes
3answers
6k views

How to avoid unflattering facial distortion when using a slightly wide angle lens?

A 35mm prime on a full format body (or 24mm on cropped) is a great lens to walk around with. But when one gets too close to someone to take a picture, invariably some of their features are ...
1
vote
1answer
249 views

What is this warped effect and how to achieve it?

What is the name of the effect used in this photo and how do you apply it to a photo? As you can see, the nearest servers (which look like cupboards) are somewhat distorted. That is the effect I ...
4
votes
3answers
903 views

What lens for taking photos of artwork with Nikon D800 without distortion?

I'm an artist and I do need to take photos of my paintings with heavy texture. I bought a 50mm f1.8 with my new Nikon D800 and I find some distortion when the painting is big 36"x 60". I used to ...
4
votes
5answers
2k views

Does sensor size affect lens distortion?

There was recently a video posted about how different focal lengths affect portrait photography, specifically how distortion at smaller focal lengths have more distortion and are less flattering. So ...
7
votes
1answer
381 views

What causes this bluish tint and other anomalies in this image?

I bought a Tamron CF Macro 28-70mm 3.5-4.5 lens on eBay for $35 AUD plus postage - cheap enough to give it a go and see what it's like. I took a range of photos with my Sony NEX-C3 to get a feel for ...
1
vote
2answers
194 views

Are there medium priced cameras that can capture photos with very little distortion?

I just got the Sony DSC-WX9 and DSC-HX100V a couple months ago, and found that, if a person's face is right in the center of the photo (for a photo with 4, 5 people standing, from head to toe), then ...
1
vote
1answer
260 views

What is the best way to take pictures for Panography style post-processing

I have recently started to play with Panography, which is a style of stitching pictures together, however on my first couple of attempts, quite a few of the pictures that I took were distorted towards ...
2
votes
1answer
1k views

Are Nikon Distortion Control Data firmware updates critical?

Nikon has released the Distortion control data upgrade for D90 and D5000 (I am an owner of Nikon D90). The Distortion Control Data firmware upgrade is available for Nikon D90 and D5000 cameras ...
2
votes
1answer
2k views

Auto cropping scanned document or photo

I usually take a picture of bill or receipt using my mobile phone and store it in a computer. Is there any desktop or Web-based software which can straighten the photo of a paper and flatten it? For ...
1
vote
0answers
171 views

Nikon D3100 transfer distorts photos [duplicate]

Possible Duplicate: Why do my images get distorted on my Nikon DSLR? I've been using this camera (Nikon D3100) for over a year and have absolutely no problems with it, until yesterday. When ...
23
votes
4answers
2k views

Do the Lightroom lens correction tools make good lenses less important?

Lightroom has Lens Correction tools such as Distortion, Vignetting, Chromatic Abberation, etc. depending on the brand and model of lens. Due to this feature, is it less relevant what the distortion ...