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Sigma 4,5mm, Anyone?  
User currently offlineMirage From Portugal, joined May 1999, 3125 posts, RR: 14
Posted (5 years 6 months 2 weeks 6 days 9 hours ago) and read 9872 times:

Good day,

I made a search in the database for photos taken with the Sigma 4,5mm but didn't find any, anyone has experience with this lens? any samples available?

thanks
Luis

12 replies: All unread, jump to last
 
User currently offlineDeaphen From India, joined Jul 2005, 1426 posts, RR: 1
Reply 1, posted (5 years 6 months 2 weeks 6 days 8 hours ago) and read 9856 times:

Not the 4.5, but i have the 8 and i love it! Very very much.

With the 4.5mm, on full frame body, expect pics like this:

http://farm3.static.flickr.com/2311/2213890569_a54931868d_o.jpg

***woman not included   ***

Regards
Nitin

[Edited 2009-03-08 07:21:20]


I want every single airport and airplane in India to be on A.net!
User currently offlineMirage From Portugal, joined May 1999, 3125 posts, RR: 14
Reply 2, posted (5 years 6 months 2 weeks 6 days 8 hours ago) and read 9845 times:

Thanks, Nitin. So the original image is circular? I've heard CS4 can transform circular images like the above in "normal" images, any plugin needed for that?

Luis


User currently offlineDeaphen From India, joined Jul 2005, 1426 posts, RR: 1
Reply 3, posted (5 years 6 months 2 weeks 6 days 6 hours ago) and read 9814 times:



Quoting Mirage (Reply 2):
Thanks, Nitin. So the original image is circular? I've heard CS4 can transform circular images like the above in "normal" images, any plugin needed for that?

Yes i have heard of such a plugin or program, not sure which one it is though.

Regards
Nitin



I want every single airport and airplane in India to be on A.net!
User currently offlineMirage From Portugal, joined May 1999, 3125 posts, RR: 14
Reply 4, posted (5 years 6 months 2 weeks 6 days 6 hours ago) and read 9799 times:

Nitim, with the sigma 8mm you don't get circular images like the above from the sigma 4,5mm, right?

thanks
Luis


User currently offlineDeaphen From India, joined Jul 2005, 1426 posts, RR: 1
Reply 5, posted (5 years 6 months 2 weeks 6 days 5 hours ago) and read 9783 times:



Quoting Mirage (Reply 4):
Nitim, with the sigma 8mm you don't get circular images like the above from the sigma 4,5mm, right?

You do if you have a full frame sensor camera.... mine is a 1.6x crop, and hence only the corners are blackened up.

Nitin



I want every single airport and airplane in India to be on A.net!
User currently offlineOly720man From United Kingdom, joined May 2004, 6747 posts, RR: 11
Reply 6, posted (5 years 6 months 2 weeks 6 days 4 hours ago) and read 9771 times:

Some samples here

http://www.dimagemaker.com/2008/07/1...-circular-fisheye-hsm-lens-review/

and here

http://www.pbase.com/cameras/sigma/45mm_ex_dc_circular_fisheye_hsm

[Edited 2009-03-08 11:30:41]


wheat and dairy can screw up your brain
User currently offlineMirage From Portugal, joined May 1999, 3125 posts, RR: 14
Reply 7, posted (5 years 6 months 2 weeks 6 days 3 hours ago) and read 9744 times:

Thank you very much for your help, I'm not used to this ultra wide angle fisheye world  Smile

So, Nitin, if I understand well, you had to crop the original of this image to eliminate the black corners?


View Large View Medium
Click here for bigger photo!

Photo © Nitin Sarin - AirTeamImages



I'm making these questions because I'm undecided between the Canon 10-22, the Sigma 8mm
and the Sigma 4,5mm, trying to understand the fisheye circular images and fisheye non circular images.

Luis


User currently offlineDeaphen From India, joined Jul 2005, 1426 posts, RR: 1
Reply 8, posted (5 years 6 months 2 weeks 6 days 2 hours ago) and read 9726 times:



Quoting Mirage (Reply 7):
So, Nitin, if I understand well, you had to crop the original of this image to eliminate the black corners?

Yup, here is the actual uncropped image.

http://i40.photobucket.com/albums/e213/deaphen/sigma8mmsample.jpg

Taken with the 50D.

Quoting Mirage (Reply 7):


I'm making these questions because I'm undecided between the Canon 10-22, the Sigma 8mm
and the Sigma 4,5mm, trying to understand the fisheye circular images and fisheye non circular images.

Understandable, i didnt know about the edge thing when i bought the lens, but now am totally used to it, ofcourse, you get programs which straighten out the picture.

Regards
Nitin



I want every single airport and airplane in India to be on A.net!
User currently offlineMirage From Portugal, joined May 1999, 3125 posts, RR: 14
Reply 9, posted (5 years 6 months 2 weeks 6 days 2 hours ago) and read 9717 times:

Thanks for your help, Nitin, I wonder which lens gives more field of view, the Canon 10-22mm or the Sigma 8mm. The Sigma has less focal lenght but by cropping the corners it might be almost the same as the Canon 10-22, my guess only.

Luis


User currently offlineOly720man From United Kingdom, joined May 2004, 6747 posts, RR: 11
Reply 10, posted (5 years 6 months 2 weeks 6 days 2 hours ago) and read 9709 times:



Quoting Deaphen (Reply 8):
Yup, here is the actual uncropped image.

I think you were standing a bit further forward, in line with the seat with the black bag on it.



wheat and dairy can screw up your brain
User currently offlineDeaphen From India, joined Jul 2005, 1426 posts, RR: 1
Reply 11, posted (5 years 6 months 2 weeks 6 days 2 hours ago) and read 9705 times:



Quoting Oly720man (Reply 10):
I think you were standing a bit further forward, in line with the seat with the black bag on it.

Yes, your quite right, that is my camera bag, and i was standing right next to it. But the wide angle aspect makes it look further away.

Quoting Mirage (Reply 9):
Thanks for your help, Nitin, I wonder which lens gives more field of view, the Canon 10-22mm or the Sigma 8mm. The Sigma has less focal lenght but by cropping the corners it might be almost the same as the Canon 10-22, my guess only.

Not quite sure about that, that fact is possibly true, never thought of that.

Regards
Nitin



I want every single airport and airplane in India to be on A.net!
User currently offlineRG828 From Brazil, joined Jan 2004, 582 posts, RR: 2
Reply 12, posted (5 years 6 months 2 weeks 5 days 19 hours ago) and read 9642 times:
AIRLINERS.NET CREW
PHOTO SCREENER

I´m shopping for one as well, what I can figure from the images is that the 4.5mm fisheye gives a full circle image on a 1.6 crop sensor, while the 8mm fisheye gives a larger image with just the corners blacked out, like in Nitin´s image above.
Correct?

What confused me is that while both lenses technically cover 180 degrees, they have different focal lengths.



I dont know the key to success, but the key to failure is trying to please everyone
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