Forum: Q & A

John Houghton said:

Nick, The nodal point(s) and entrance pupil are characteristic of the lens alone. They can be scientifically measured using a nodal slide without any camera involvement at all.
John

Smooth said:

Nick,

I have used all Agnos products for years and no, you do not need to readjust the lens when changing camera bodies. This doesn't mean that the NPP doesn't change because it does, but it is only slightly and all decent software will deal with slight parallax errors. It should be noted that the MrotatorA/B are designed for use with the camera locked into Fisheye (1) setting. Though you can use the zoom to crop the edges outside of this setting you will effect the NPP quite a bit more.
Regards, Smooth
www.smooth360.info

Nick Fan said:

I know the NPP should be independent of the camera. But a fisheye converter is just a part of the lens system. together with the lens of the fixed lens DC, it forms a new lens system.

Nick Fan said:

Hi Smooth,

Do you take 2 shots or 3 shots on the Mrotator?
Have you taken panos using the fisheye mode 2 setting, full-frame fisheye? I wonder on the quality in full-frame fisheye mode compared to the less expensive DSLR fisheye lens.

nick

Smooth said:

Quality is much better in FE2 mode of course.

I did a clean up of a "fullscreen" pano for a Easypano forum member not that long ago (zoomed cropped/drum image in manual mode 4 shots at the 90 degrees stops) who was using a Coolpix and FC-E9 I can share the URL privately if you like. I'm sure that he won't mind as it was public on the Easypano forum.

Regards, Smooth
www.smooth360.com

badders said:

Hey! My web site is now a "Tiny URL"! Cool!
Andrew Baddeley
www.360tacticalvr.co.uk

Doug Aurand said:

Nick
There's not a different Nodal Point when shooting 2 or 3 shots with an FC-E8 or FC-E9.

I've done both 2 and 3 shot virtual images using the same lenses and cameras and they stitch the same.

I have an old Coolpix 950 with an FC-E8 and use a Coolpix 5400 with and FC-E9 for real estate tours

I've used 2 different iPIX Rotators for 2 and 3 shot captures and the position of the camera/lens doesn't change.

The iPIX Rotators were camera and lens specific. There's and arm/cradle that holds the camera and lens and it bolts onto either a 2 or 3 stop stem. The 3 stop stems from iPIX are kind of rare but I have one.

The other way I've done both 2 and 3 stop captures is locking up the iPIX Rotator Stem and putting it on a Manfrotto 3414 Panoramic Head. Then I just move the set screw on the 3414 from 4 stops to 6 stops and skip every other stop.

I normally do 2 shot captures, but Friday did a 3 shot capture because I wasn't sure if I was "spliting the light source" correctly. That's something unique to the 2 fisheye capture method. So I just moved the stop screw and shot a 3 fisheye capture for that scene and put it back to do 2 fisheye captures for the rest of the house.

iPIX used the same arm/cradle regardless of whether you ordered a 2 or 3 stop stem. The arm/cradle is what positioned the Nodal Point with iPIX Rotators

Doug Aurand
Albuquerque, NM