How to assemble with Canon 6D fullframe and Canon 8-15mm fisheye? [Archive] - Nodal Ninja Forum

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jesperfrehr
12-27-2013, 01:35 PM
I bought the Canon 8-15mm. It is nice.
I have a NN3 and I would like know which way is the best way to get the shots in the box?

I read http://michel.thoby.free.fr/Canon_8-15mm/8-15mm_review.html#NoParallaxPoint

Canon 8-15 mm @ 8 mm with 3 Horizontal is out of the question because of reduced resolution.

But which on of these should I use:
Canon 8-15 mm @ 12 mm with 4 Horizontal and a nadir
Canon 8-15 mm @ 15 mm with Nadir + 4 Horizontal + Zenith
Canon 8-15 mm @ 15 mm with Nadir + 6 Horizontal + Zenith

I want to play "safe" with minimun stitching errors and a good resolution. The amount of pictures is not so much an issue.

Why do a lot of you choose 12mm with this lens?

Best regards
Jesper

nick fan
12-28-2013, 12:07 AM
12mm is good for single row spherical. You can tilt up by 5-10 deg and you can close the zenith.
Are you sure 4 horizontal is enough at 15mm? You need good overlap.

Nick

John Houghton
12-28-2013, 01:17 AM
Are you sure 4 horizontal is enough at 15mm? You need good overlap.
The HFOV at 15mm is only 91 so the images barely overlap at all.

John

jesperfrehr
12-30-2013, 07:10 AM
So I guess the 12mm focal lenght is chosen because of the resolution vs the black area and to be able to avoid the zenith shot?

Still - all the shots @ 15mm will get a better resolution - right?

Jesper

nick fan
12-30-2013, 08:40 AM
So I guess the 12mm focal lenght is chosen because of the resolution vs the black area and to be able to avoid the zenith shot?

Still - all the shots @ 15mm will get a better resolution - right?

Jesper

At 15mm, you get high resolution but requiring 5-6 shots around+ Z/ N.
you trade resolution with speed

nick

John Houghton
12-30-2013, 09:44 AM
Approximate 360x180 equirectangular panorama image sizes for the 8-15mm fisheye on a 6D:

@8mm: 6950x3475
@12mm: 10600x5300
@15mm: 14440x7220

John