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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 27 Oct 2008 (Monday) 18:40
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fish-eye lens?

 
doghouse_94545
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Oct 27, 2008 18:40 |  #1

hello all!!

i am looking to purchase a fisheye lens for my 40D, but kinda confuse which one to get,

i want to get a lens that would work with the 40D and also work on a 5d when i upgrade down the line,
i hear that some fisheye lens won't work on the 5d, i also hear that the 40d have distortion witha 15mm lens

any help/suggestion is appriciated!!

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Jman13
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Oct 27, 2008 18:59 |  #2

If you want full compatibility, the Tokina 10-17 is perfect. It's a true fisheye on your 40D, and it will work as a true fisheye without vignetting from 15-17mm on the 5D. (You won't be able to use it at 10-14mm on the 5D, but it doesn't matter...it's the full 180 degrees at 15mm on full frame, and the full width at 10mm on the 40D. It's the only fisheye around that will give you a real fisheye on both formats.


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NorCalAl
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Oct 27, 2008 19:59 |  #3

Gotta second Jman here, I got mine a month or so ago and I've been having some fun with it. Pretty cool at both ends, but really 'fishy' at the 10mm end.


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doghouse_94545
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Oct 28, 2008 00:22 |  #4

Jman13 wrote in post #6572535 (external link)
If you want full compatibility, the Tokina 10-17 is perfect. It's a true fisheye on your 40D, and it will work as a true fisheye without vignetting from 15-17mm on the 5D. (You won't be able to use it at 10-14mm on the 5D, but it doesn't matter...it's the full 180 degrees at 15mm on full frame, and the full width at 10mm on the 40D. It's the only fisheye around that will give you a real fisheye on both formats.


thanks!!


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tiktaalik
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Oct 28, 2008 06:26 |  #5

On a 40D:

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My 10mm fisheye is the Sigma f/2.8 and like it a lot but note that neither the Sigma nor the Tokina 10mm gives a true 180degree diagonal field of view on a Canon body.

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angryhampster
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Oct 28, 2008 06:36 |  #6

I'll throw out a third suggestion for that Tokina 10-17. I loved mine.

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Jman13
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Oct 28, 2008 07:33 |  #7

tiktaalik wrote in post #6575547 (external link)
My 10mm fisheye is the Sigma f/2.8 and like it a lot but note that neither the Sigma nor the Tokina 10mm gives a true 180degree diagonal field of view on a Canon body.

True, but it's 167 degrees, which is darn near close enough. The extra 13 degrees really will not make a whole lot of difference. Note that the Tokina 10-17 on the 5D at 15mm will still be 180 degrees corner to corner.


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doghouse_94545
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Oct 28, 2008 15:04 |  #8

guys and gal i really appriciate the help and the pictures too!!!

so is there some lens similar to the Tokina 10-17 with 2.8?

just to clarify things here, what is minimum MM lens that would work on the 40D and
5D?
i am just a lil confused!!
i was told to look the lowest aperture as possible something like a 2.8,
the Tokina is f/3.5-4.5, is it worth to get it or get some other ones that 2.8


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wimg
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Oct 28, 2008 15:25 |  #9

doghouse_94545 wrote in post #6578537 (external link)
guys and gal i really appriciate the help and the pictures too!!!

so is there some lens similar to the Tokina 10-17 with 2.8?

No, it is the only one of its kind. All other fisheyes are designed for APS-C or FF, and will only provide work well with the format size they are designed for. Because teh tokina 10-17 is a zoom, and designed to work with a bunch of APS-C cameras, the distance from flange to sensor is large enough to be able to accommodate the swing of any Canon dslr mirror, which is why it can be used on any Canon (d)slr, including FF ones.

Furthermore, it is designed as a true 180 degree diagonal fisheye for an APS-C dslr. Now, Canon's APS-C implementation is slightly smaller, sensor wise (hence 1.6 crop), than a true APS-C design (1.5 crop). This is why a Canon APS-C dslr captures just a little less than 180 degrees at 10 mm. It would need 9.5 mm to see 180 degrees.

Because the image circle gets bigger when zooming, it gets large enough at some stage to cover an APS-H sensor (at ~12 mm) and a FF sensor (at 15 mm). This is why it works well with any Canon dslr and will still have a 180 degree diagonal view of the world, and a little bit less on a 40D (or XSi, etc.).

just to clarify things here, what is minimum MM lens that would work on the 40D and

180 degree diagonal view: 9.5 mm
180 degree circular view: 4.2 mm or less (in the latter case the image circle would be even smaller than the sensor height))

5D?

180 degree diagonal view: 16 or 15 mm
180 degree circular view: 8 mm or less

i am just a lil confused!!
i was told to look the lowest aperture as possible something like a 2.8,
the Tokina is f/3.5-4.5, is it worth to get it or get some other ones that 2.8

F/3.5 is only 2/3 f a stop difference, which especially with a fisheye is neither here nor there.

BTW, I use my Tokie 10-17 on both a 40D and a 5D :D. And indeed, on the 5D at 15 mm it gives a slightly wider view on the world than at 10 mm on the 40D.

You can still get a wider view from it, by removing the built-in lens hood, but that is a non-reversible tricky surgical operation. You'll get about 193 degrees diagonally on a 5D that way.

Kind regards, Wim


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Jman13
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Oct 28, 2008 15:57 |  #10

How would removing the hood give you a wider view on a crop camera, when the hood doesn't vignette on a crop body?


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wimg
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Oct 28, 2008 16:00 |  #11

Jman13 wrote in post #6578927 (external link)
How would removing the hood give you a wider view on a crop camera, when the hood doesn't vignette on a crop body?

oops, sorry, my mistake.

I'll edit that. I think I need to go to bed early tonight :D.

Kind regards, Wim ;)


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doghouse_94545
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Oct 28, 2008 17:43 |  #12

wimg wrote in post #6578698 (external link)
No, it is the only one of its kind. All other fisheyes are designed for APS-C or FF, and will only provide work well with the format size they are designed for. Because teh tokina 10-17 is a zoom, and designed to work with a bunch of APS-C cameras, the distance from flange to sensor is large enough to be able to accommodate the swing of any Canon dslr mirror, which is why it can be used on any Canon (d)slr, including FF ones.

Furthermore, it is designed as a true 180 degree diagonal fisheye for an APS-C dslr. Now, Canon's APS-C implementation is slightly smaller, sensor wise (hence 1.6 crop), than a true APS-C design (1.5 crop). This is why a Canon APS-C dslr captures just a little less than 180 degrees at 10 mm. It would need 9.5 mm to see 180 degrees.

Because the image circle gets bigger when zooming, it gets large enough at some stage to cover an APS-H sensor (at ~12 mm) and a FF sensor (at 15 mm). This is why it works well with any Canon dslr and will still have a 180 degree diagonal view of the world, and a little bit less on a 40D (or XSi, etc.).

180 degree diagonal view: 9.5 mm
180 degree circular view: 4.2 mm or less (in the latter case the image circle would be even smaller than the sensor height))

180 degree diagonal view: 16 or 15 mm
180 degree circular view: 8 mm or less

F/3.5 is only 2/3 f a stop difference, which especially with a fisheye is neither here nor there.

BTW, I use my Tokie 10-17 on both a 40D and a 5D :D. And indeed, on the 5D at 15 mm it gives a slightly wider view on the world than at 10 mm on the 40D.

You can still get a wider view from it, by removing the built-in lens hood, but that is a non-reversible tricky surgical operation. You'll get about 193 degrees diagonally on a 5D that way.

Kind regards, Wim

thanks Wim for breaking it down!!!


5D MKII, 5D, 40D, 3- 580ex II, 3 Gemini 500r studio light, Sekonic L358, ExpoDisc, 4-Pocket Wizard Flex TT5, 4-Pocket Wizard Plus II,70-200mm f/2.8L IS, 24-70mm f/2.8L, 85mm f/1.2L, 100mm f/2.8L IS macro, 16-35mm f/2.8L, 15mm f/2.8 Fisheye,50mm f/1.8, 1.4x EF Extender II, 2x EF Extender II

  
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