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View Full Version : How many photos for a full spherical pano (10mm on a DX D90)?



kosmarnik
01-16-2010, 07:22 AM
Hi, just got a Sigma 10-20mm f3.5 and I'm doing calibration for my Nikon D90 + NN5 + RD8.

What I can't figure out is how may rows to shoot.
There are no full spherical pano calculators out there :sad:

I'll try a 2 row + nadir + zenith, see how it goes.
Upper row: +30 pitch 5 steps (72 deg)
Lower row: -15 pitch 5 steps (72 deg)

It should get me covered but there could be a better arrangement.
Any suggestions?

nick fan
01-16-2010, 07:31 AM
CHECK OUT VRWAVE.COM

NICK

badders
01-16-2010, 07:52 AM
8 around at 0 degs
4 at -45 degs
4 at +45 degs
1 x zenith
1 x nadir

http://www.panoguide.com/forums/qna/4958/

kosmarnik
01-16-2010, 09:20 AM
8 around at 0 degs
4 at -45 degs
4 at +45 degs
1 x zenith
1 x nadir

http://www.panoguide.com/forums/qna/4958/


Whooa, that's way to many photos. The overlap is huge, might as well use the 18mm lens and get a better resolution pano.

I found Hugin's preview useful for visualizing the overlap. I just position the photos manually and check the overlap in the preview.

DemonDuck
01-16-2010, 11:41 AM
Whooa, that's way to many photos. The overlap is huge, might as well use the 18mm lens and get a better resolution pano.

I found Hugin's preview useful for visualizing the overlap. I just position the photos manually and check the overlap in the preview.



All you really need to do is look at the LCD while rotating the camera and judge how much overlap you are getting at various degrees of rotation. You don't have to be exact.

Do the same thing for the tilt.

I can shoot 6+6+6 with about a 17-18mm on my compact so you should be able to shoot 4+Z+N and get enough overlap to stitch with a 10mm. It might be tight but I've found that the less overlap the better because the control points are close to the seam.

hindenhaag
01-16-2010, 01:05 PM
Hi,

try this on your own, check as Nick told you Vrwave as well.




Sigma 10-20mm/f4-5.6 Ex DC D90 Spherical Panorama


Horizontal Parameters Vertical Parameters

Zoom Rows Degree Stops Pitch Zenith Nadir

10 2 60¬? 6 30¬? 90¬? -90¬?
60¬? 6 -30¬?

12 2 45¬? 8 30¬? 90¬? -90¬?
45¬? 8 -30¬?

45¬? 8 45¬?
14 3 36¬? 10 0¬? 90¬? -90¬?
45¬? 8 -45¬?

45¬? 8 45¬?
17 3 30¬? 12 0¬? 90¬? -90¬?
45¬? 8 -45¬?

45¬? 8 54¬?
20 4 30¬? 12 18¬? 90¬? -90¬?
30¬? 12 -18¬?
45¬? 8 -54¬?




For security reasons Overlap is calculated around 30%.

http://vrwave.com/

Heinz ©hindenhaag

DemonDuck
01-16-2010, 03:31 PM
Hi,

try this on your own, check as Nick told you Vrwave as well.
[stuff deleted]
For security reasons Overlap is calculated around 30%.

http://vrwave.com/

Heinz ©hindenhaag



That really seems like an excessive amount of pictures. Like I said, I can shoot 6+6+6 plus the tripod patch with a 17-18mm lens on my compact.

8+12+8+Z+N is way more trouble than it's worth. I suspect the other patterns are similarly excessive.

John Houghton
01-17-2010, 12:48 AM
I can shoot 6+6+6 with about a 17-18mm on my compact so you should be able to shoot 4+Z+N and get enough overlap to stitch with a 10mm. It might be tight but I've found that the less overlap the better because the control points are close to the seam.

Tight? The hfov (portrait) of the 10mm on the D90 is 77 degrees. They will not overlap at all at 4 shots around.

John

YvesG
01-17-2010, 04:47 AM
Using my Panorama calculator (you can download it on my blog welcome page) (http://photos.yves.over-blog.com), I found :

For a D90 (15.8 x 23.6 mm), with 25% overlap
- 8 pictures at 0¬?,
- 4 pictures at 60¬?,
- 4 pictures at -60¬?,
- 1 picture for nadir.

If you go down to 20% overlap, I find
- 6 pictures at 0¬?,
- 2 pictures at 75¬?,
- 2 pictures at -75¬?,
- 1 picture for nadir.

kosmarnik
02-09-2010, 04:26 AM
Using my Panorama calculator (you can download it on my blog welcome page) (http://photos.yves.over-blog.com), I found :

If you go down to 20% overlap, I find
- 6 pictures at 0¬?,
- 2 pictures at 75¬?,
- 2 pictures at -75¬?,
- 1 picture for nadir.


Thanks! Seems reasonable, but still takes 3 rows + N.
I've successfully been using a similar arangement:


6 at +15¬?
4 at -30¬?
1 zenith
1 nadir


With a proper calibrated NN5 it stitches perfectly.
The only problem I have is with my lens.
My copy of Sigma 10-20mm f3.5 has a some bad blurring, when wide open (f3.5), in one extreme edge.
When using tight settings as I've been it's a problem.

Though it's almost a non-issue at f8.

With a better copy (or a different bad edge ;P) there would be no such problems.