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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 06 Sep 2006 (Wednesday) 12:54
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Fisheye vs Ultra Wide Angle ?

 
dougyang
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Sep 06, 2006 12:54 |  #1

Out of curiosity, does a 15mm fisheye cover more range than a 10mm rectilinear ? How do these compare after debarralizing ? I'm using a 10D with a 1.5x crop.




  
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Cathpah
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Sep 06, 2006 13:23 |  #2

for you the 15mm fisheye won't cover all that much area. the 15mm fisheye is meant for full frame cameras to get 180 degree coverage (from one corner to the opposite corner). If you want that on your 10d you'd need to buy the peleng 8mm fisheye which you can get on ebay pretty cheaply and i think I also saw a thread on here about someone organizing a group discount for peleng 8mm fisheyes...might want to look into that.


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Tee ­ Why
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Sep 06, 2006 19:58 |  #3

I don't know the figures but about the same. If you are interested in getting wide shots on a cropped sensor, I'd suggest an ultrawide vs. a 15mm fisheye.


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Cathpah
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Sep 06, 2006 22:46 as a reply to  @ Tee Why's post |  #4

Tee Why wrote:
I don't know the figures but about the same. If you are interested in getting wide shots on a cropped sensor, I'd suggest an ultrawide vs. a 15mm fisheye.

15mm really isn't that wide on a cropped sensor. that's why nikon, sigma (i believe), and peleng all sell 8mm fisheyes. you don't get the fisheye effect very much and you don't get a very wide field of view.

ultrawide is like the 10-22, which would actually give you a much wider field of view than that 15mm fisheye.


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SurfKahakai
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Sep 07, 2006 00:39 |  #5

I love my fisheye but wish I picked up a 10-22 instead. The fish just isn't fishy with my 20D.


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stumpy
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Sep 07, 2006 03:39 |  #6

To echo what everyone else has said really - the 15mm on a crop is really justa WA. Works well for me.


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BruceC
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Sep 07, 2006 04:08 |  #7

what makes a fish-eye? is 10mm fish differnt from a regular 10mm?


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Jim ­ G
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Sep 07, 2006 06:50 as a reply to  @ BruceC's post |  #8

BruceC wrote:
what makes a fish-eye? is 10mm fish differnt from a regular 10mm?

there's a fishbowl effect, the image is distorted... I don't have any images myself but google fisheye and you should get some :) You'll recognise it as soon as you see it.


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tiktaalik
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Sep 07, 2006 07:06 |  #9

A fisheye lens has a field of view of 180 degrees. The circular fisheye, like the Sigma 8mm, has a 180 degree field of view in all directions while the 15mm fisheye has a 180 degree field of view along the diagonal. A rectilinear lens can never cover 180 degees field of view. A 15mm fishy is wider than a 14mm rectilinear lens.

On a crop camera the 15mm fishy has a field of view (diagonal) of about 113 degrees. If defished the diagonal field of view is ~104 degrees. This is equivalent to a ~12mm lens on the 1.6 crop cameras.


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adam*
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Sep 07, 2006 08:29 |  #10

If I had the money i'd buy the Canon 10-22 straight away, the wideness of it is amazing. Then again if I did alot of skate shots i'd consider the Peleng. Depends on what you need it for really.


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Tom ­ W
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Sep 07, 2006 14:10 |  #11

The 10-xx zoom will give you a wider field of view than the 15 mm fisheye on an APS-C (1.6X) camera. I note that you mention a 10D in the first post, so the EF-S lens is out, but there are a couple of alternatives from Sigma, Tokina, and Tamron.

Here's a 16 mm shot off the back deck with a 16 mm lens on full-frame. The equivalent field of view of 16 mm on full-frame is 10 mm on the 10D, 20D, or other 1.6X camera:

IMAGE: http://www.pbase.com/photosbytom/image/66464659.jpg

And the 30D with the 15 mm fisheye attached:

IMAGE: http://www.pbase.com/photosbytom/image/66464884.jpg

I took the two at different times of day, and I did not try to equalize the exposure, saturation & contrast so they do look a bit different. The whole purpose was to illustrate the difference in wideness.

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dougsmit
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Nov 27, 2006 13:32 |  #12

BruceC wrote in post #1952736 (external link)
what makes a fish-eye? is 10mm fish differnt from a regular 10mm?

Fisheye and normal lenses have different ways of distorting a round world onto a flat photo. Regular 'rectilinear' lenses keep straight lines straight but make things near the corners abnormally large compared to the centers. Fisheye maintain the size relationships better but bend straight lines unless they pass through the center. Opinions differ as to which is better but most people seem to prefer rectilinear. I am in the minority. I offer a lot more in the way of opinions on the matter (with illustrations) on my Peleng and Zenitar pages. In truth, we need a lens of each type to cover everything so which you buy will depend on which type photo is most appealing or most disturbing to your eye. There are programs that allow 'defishing' fisheye shots. I find that often I decide to partly defish an image so it does not go over the edge and trade in the fisheye 'faults' for the rectilinear 'faults'. Each will have to decide what is best for themself.
http://home.comcast.ne​t/~dougsmit/fisheye.ht​ml (external link)
http://home.comcast.ne​t/~dougsmit/fisheyez.h​tml (external link)


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BruceC
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Nov 28, 2006 14:11 |  #13

thanks dougsmit and looks like some good info on your web page. but how did you find such ah old thread?


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jev
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Nov 28, 2006 18:58 |  #14

Here is fisheye 16mm on 5D

This is actually russian lense zenitar

IMAGE: http://static.flickr.com/100/308690395_0c9f306687_o.jpg

lot's of fun

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Warby
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Nov 28, 2006 21:13 as a reply to  @ jev's post |  #15

Here are a couple of images taken with the Peleng 8mm on a 1.6 crop camera (D60). They will give you an idea of the distortion and sensor coverage that you get with this circular fisheye lens.

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IMAGE NOT FOUND
IMAGE IS A REDIRECT OR MISSING!
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Paul



  
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Fisheye vs Ultra Wide Angle ?
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