Show us you circular fish-eye images

[FGAng]

So my unwieldy question is neither stupid nor irrelevant, projection methods and the like, while I understand the explanation qualitatively, quantitatively I have too little understanding of optical physics to completely make sense of it without digging into mathematics of some college text books I would rather not.  Another unwieldy sentence... I do apologize.

I have a Tokina DX 10-17mm fisheye zoom, which is a diagonal fish eye lens, that I used both in DX and FX (from 15mm onward, effectively making it a 16mm f/4.5 FE).

And Akira-san (I assume) said that Samyang does not make a circular fish eye lens, and I am fundamentally not interested in a diagonal fish eye lens, the simpler question might be what are my options for FX?  For a lens that will not see too much action, I rather not pay the Sigma's asking price.  Opteka 6.5mm?

And I suppose the other option is to use the Samyang 8mm and PP the circle to it...

I am not partial to using a DX lens and push it to FX service, as I have done with the Tokina 10-17 DX FE with a loaner D700 and my D800 and Df.

[Jørgen Ramskov]

Well, I paid less than half of the asking price for my copy and it basically new. It had only been used a few times when I bought it.

[Akira]

So my unwieldy question is neither stupid nor irrelevant, projection methods and the like, while I understand the explanation qualitatively, quantitatively I have too little understanding of optical physics to completely make sense of it without digging into mathematics of some college text books I would rather not.  Another unwieldy sentence... I do apologize.

I have a Tokina DX 10-17mm fisheye zoom, which is a diagonal fish eye lens, that I used both in DX and FX (from 15mm onward, effectively making it a 16mm f/4.5 FE).

And Akira-san (I assume) said that Samyang does not make a circular fish eye lens, and I am fundamentally not interested in a diagonal fish eye lens, the simpler question might be what are my options for FX?  For a lens that will not see too much action, I rather not pay the Sigma's asking price.  Opteka 6.5mm?

And I suppose the other option is to use the Samyang 8mm and PP the circle to it...

I am not partial to using a DX lens and push it to FX service, as I have done with the Tokina 10-17 DX FE with a loaner D700 and my D800 and Df.

Apparently Opteka 6.5mm is a diagonal fisheye (a circular fisheye shouldn't have a lens hood).  I would even go so far as to assume that Opteka 6.5 is actually Samyang 8mm?!

Your assumption is right.  I'm Japanese and "-san" is a Japanese honorific.  But you don't need it here.     Welcome to NG!

[Akira]

Apparently Opteka 6.5mm is a diagonal fisheye (a circular fisheye shouldn't have a lens hood).  I would even go so far as to assume that Opteka 6.5 is actually Samyang 8mm?!

You may want to compare the images of the lenses in question here:

http://opteka.com/opt65ii.aspx

and here:

http://www.photozone.de/canon-eos/526-samyang8f35eos

[bobfriedman]

Nikon D800E ,Nikkor 8mm f/2.8 Fisheye Ai-S
f/8.0 at 8.0mm iso200


Nikon D810 ,Nikkor 8mm f/2.8 Fisheye Ai-S
1/250s f/8.0 at 8.0mm iso200


Nikon D810 ,Nikkor 8mm f/2.8 Fisheye Ai-S
1/2000s f/5.6 at 8.0mm iso640

[Bjørn Rørslett]

That happy hippie guy really suited the fish treatment

[bobfriedman]

That happy hippie guy really suited the fish treatment

believe it or not, he is an art teacher at one of the local high schools.

[FGAng]

OK, this is probably not good enough photographically, but I just wanted to try.  Do bear with me.  Mundane subject in my room.

Tokina 10-17mm FE zoom, at 10mm, on Df.  PP in PS, cut out the circle part of the image in the middle; the original is a bar inserted into a circle, if you know what I mean, with black borders.



Poor man's circular fisheye?

Again it is probably a projection issue, where 10mm Tokina / 10.5mm Nikon / 8mm Samyang/Bower/Rokinon / 6.5mm Opteka all give 180 degrees on DX.  So can I use 10mm Tokina and get this circular FE through PP?

[Erik Lund]

No.

Hmmmm, seems like it would be good idea to learn about projection by looking at some images and illustration or this will keep on going in circles,,, 

[Akira]

Here's the link to the Wikipedia about the fisheye lenses of various projection type:

https://en.wikipedia.org/wiki/Fisheye_lens

[Erik Lund]

Thanks for providing the link!

Here is a shot also posted in another thread, Nikkor Fisheye 6mm f/2.8,,, Circular Fisheye on full frame FX (D810), 390 deg and 220 deg field of view,,,

_EGL1888 by Erik Gunst Lund, on Flickr

[Dr Klaus Schmitt]

I have the PELENG 3.5/8mm sitting aroun, guess I should give it a spin ;-)

[Erik Lund]

Just take care of your mirror, the Pelang dosn't clear in all cameras,,,

[FGAng]

Thanks for providing the link!

Here is a shot also posted in another thread, Nikkor Fisheye 6mm f/2.8,,, Circular Fisheye on full frame FX (D810), 390 deg and 220 deg field of view,,,

Wow!  I just did a copy-cat downstairs, and 180 is not 220 deg...  Salute!

[Edgy01]

I hope I'm not too late to the game.

Shot this awhile ago with F5 and Kodachrome and these all are with the Fisheye-Nikkor 8mm f/2.8 (the low budget fish)...

Stonehenge, cathedral in France, and a bridge in Germany.  (Normal view tossed in for comparison).

Dan

P.S.  So pleased to see Bjørn Rørslett alive and well herein!