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Questions tagged [fisheye]

A fisheye lens is an ultrawide-angle lens that produces strong visual distortion intended to create a wide panoramic or hemispherical image. Much like that of looking through a fish bowl.

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41
votes
10answers
50k views

What can a fisheye lens be useful for?

I have a variety of lenses in my camera kit. One that I do not have, and has me curious, is a fisheye lens. I mostly understand what it does: it captures an image with distortion similar to what you ...
5
votes
2answers
2k views

What is the relationship between field of view and focal length for fisheye?

What is the relationship between the focal length and field of view for an equal-area ("equisolid") projection fisheye lens? Alternatively, what is the relationship between the 180-degree image ...
12
votes
4answers
17k views

How wide can a lens be before it begins to produce distortion?

Some lenses will produce distortion near a photo's edges (lines that should be straight begin to curve). Fisheye lenses definitely do this, and some ultra-wide lenses will do this too. I like wide ...
10
votes
5answers
8k views

What software should I use for converting fisheye photos to normal rectilinear photos?

Can you recommand me a software for doing this job? I shoot using Sigma 8mm lens and I would like to be able to obtain a normal image out of that. The camera is canon 550D.
6
votes
2answers
682 views

Is it worth buying cheap lens attachments for my camera?

I'm considering buying a fisheye/wide-angle modifier. The brand-name modifier costs around £150 for a single wide-angle modifier which also requires an adapter ring. I've also seen, on ebay, kits ...
22
votes
9answers
12k views

Why don't more people use fisheye lenses as a cheap wide angle lens?

From my understanding, a fisheye lens usually has a coverage of 180 degrees or close to it. Given the extreme coverage and the availability of software that can turn fisheye images back to a ...
9
votes
7answers
8k views

How would one use filters with the “bulb”-like shape front element lenses?

I am toying with the idea of picking up either the Samyang/Rokinon 14mm f/2.8 IF ED UMC or the 8mm f/3.5 Aspherical Fisheye lens. These lenses have a built-in petal-shape hood and a "bulb-like" front ...
6
votes
2answers
2k views

What is the correct, standard EXIF metadata to add for Rokinon 8mm fisheye lenses?

I own a Rokinon 8mm Ultra Wide Angle f/3.5 Fisheye Lens for Canon EF Mount. This is a manual lens not electrically connect to the Canon 60D body I use it with. With exiftool I want to add the correct ...
9
votes
1answer
718 views

Is the focus plane of a fisheye lens inherently curved?

After shooting of a fisheye lens earlier this week, I noticed that what is in focus does not seem to lie on a flat plane as it would for a rectilinear lens. Now, I am aware that lenses usually exhibit ...
4
votes
3answers
5k 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 ...
12
votes
1answer
502 views

Can anyone identify this lens?

I read once, in a book, about a lens that was an "inverse fisheye". Basically a hemispherical mirror mounted at one end of a glass tube. I can't remember what it was called, nor can I find any ...
5
votes
3answers
880 views

What is the proper exif tag to mark a lens as a fisheye?

I'm shooting panoramas with a manual 8mm fisheye lens on my Canon 60D DSLR (APS-C, 1.6x crop factor). Since the camera cannot talk to the lens, the exif data in the pictures is all wrong. I know how ...
1
vote
3answers
3k views

How is Focal Length defined for 180-degree fisheye lenses?

The definitions of Focal Length I saw seem to implicitly assume that the field of view is finite, which isn't true for 180-degree lenses, or presume parallel transport of certain rays passing through ...
1
vote
1answer
939 views

Why doesn't my fisheye adapter gives fisheye distortion on my APS-C DSLR?

I'm new to photography and I have questions about fisheye distortion adapters. I bought a Spiratone/Soligor/Kenko Fisheye lens adapter for my lens, because I didn't want to spent a lot just to try ...
0
votes
5answers
9k views

How do I choose which low-cost fisheye lens is right for me?

Background: I'm an amateur photographer who wants to start taking pictures with a fisheye lens, my gear is a Nikon DX D5100. I would like to buy a fisheye lens, I know the Nikon 10.5mm f/2.8G ED AF ...
0
votes
2answers
498 views

Cheap panoramic setup

I'm looking for a cheap panoramic 360x180 (approx. don't mind the "feet" as long as it's close) setup with decent resolution. I weighed my options and thought up the following: cellphone with fisheye ...