Settings for Canon 450D (Rebel XSi) with Opteka 6.5mm fisheye (Samyang 8mm)

Welcome to Nodal Ninja Forum

+ Reply to Thread
Results 1 to 12 of 12

Thread: Settings for Canon 450D (Rebel XSi) with Opteka 6.5mm fisheye (Samyang 8mm)

Share/Bookmark
  1. Settings for Canon 450D (Rebel XSi) with Opteka 6.5mm fisheye (Samyang 8mm)

    #1
    Users Country Flag VinkoCM's Avatar
    Join Date: Nov 2009
    Location: Ottawa, Ontario, Canada
    Posts: 65

    Hello there,

    Does anybody know the rail settings for the NN3 with a Canon Rebel XSi (450D) and the Samyang 8mm fisheye lens (Opteka 6.5mm)? I have 9.65mm for the upper arm and 5.5mm for the lower arm, but I am not able to get very good stiches. Do these settings sound ok? Note: the settings include the camara mounting plate and the rail plate that come with the MKII.

    Vinko
  2. #2
    Users Country Flag
    Join Date: Apr 2008
    Location: Hong Kong
    Posts: 2,414

    follow the tutorial to check the accuracy of the settings.
    http://www.johnhpanos.com/epcalib.htm

    nick



    Fanotec
    We listen. We try harder.
  3. #3
    Users Country Flag
    Join Date: Aug 2008
    Location: Netherlands
    Posts: 1,740

    Vinko,

    use this to check your lower rail setting: http://www.easypano.com/forum/displa...1&TopicID=4162

    Heinz
  4. #4
    Users Country Flag VinkoCM's Avatar
    Join Date: Nov 2009
    Location: Ottawa, Ontario, Canada
    Posts: 65

    Hi Nick. I have been using John's method, but was not able to zero in on the correct settings. That is why I was wondering if anybody else had the settings.

    Thanks Heinz for the link. Using the method in the link I was able to find the best rail setting for the lower rail (5.275 cm). It worked great and was very easy.

    Thanks.
  5. #5
    Users Country Flag
    Join Date: Aug 2008
    Location: Netherlands
    Posts: 1,740
    Last edited by hindenhaag; 11-14-2010 at 09:31 PM.
  6. #6
    Users Country Flag
    Join Date: Aug 2008
    Location: Netherlands
    Posts: 1,740

    Deleted. Was test for Derek /IT
    Last edited by hindenhaag; 11-14-2010 at 09:42 PM.
  7. #7

    Quote Originally Posted by VinkoCM View Post
    Hi Nick. I have been using John's method, but was not able to zero in on the correct settings.
    I would be interested to hear which of the methods I describe you had trouble with and what exactly went wrong.

    John
  8. #8
    Users Country Flag
    Join Date: Aug 2008
    Location: Netherlands
    Posts: 1,740

    Hi John,
    also an early morning bird....

    Yes, that would be nice to know. Cause I think with all the methods you describe it should end up in a good final result. But may be he had problems because o the samyang special lens design, which result in NPP very close together compared to other lenses.

    Regards,
    Heinz

    BTW: http://pt4pano.com/de/blog/nodalpunkt-npp-oder-lpp

    Though it is in german, the lists might be helpful.
    Last edited by hindenhaag; 11-15-2010 at 01:50 AM.
  9. #9

    Quote Originally Posted by hindenhaag View Post
    But may be he had problems because o the samyang special lens design, which result in NPP very close together compared to other lenses.
    Heinz, I'm not sure what you mean by that. The Samyang behaves much like any other lens when determining the NPP. I found it perfectly straightforward.

    John
  10. #10
    Users Country Flag
    Join Date: Aug 2008
    Location: Netherlands
    Posts: 1,740

    John, I was referring to this list:

    Winkelabhängigkeit der NPP-Position für einige beliebte Panorama-Fisheyes

    30° 40° 50° 60° 70° 80° 90°
    Sigma 3,5/8mm
    -1,0mm -0,5mm +0,5mm +2,5mm
    +5,0mm +7,5mm +11mm
    Sigma 2,8/10mm
    -1,0mm -0,5mm +0,5mm +1,5mm +2,5mm +4,0mm
    -
    Nikkor 2,8/8mm -1,0mm
    -0,5mm
    +0,5mm
    +2,5mm
    +4,5mm
    +6,5mm +9,5mm
    Samyang 3,5/8mm -1,0mm
    -0,5mm
    +0,5mm
    +1,0mm
    +2,0mm
    +3,0mm +4,5mm
    Sony NEX ECF1 -2,7mm
    -1,0mm
    +0,7mm
    +2,0mm
    - - -
    Lumix 3,5/8mm -1,5mm
    -0,6mm
    +0,8mm
    +2,0mm in the link below.

    Heinz
  11. #11

    Heinz, I see what you mean. The variation of the NPP with angle of incidence is indeed smaller for the Samyang, as compared to the Sigma 8mm, for example. But that tends to make things easier rather than more difficult. For a rectilinear lens there is often no variation at all, so it is then not important to set the head for minimum change in the entrance pupil position only at the angles the panorama shots will be taken at.

    John
  12. #12
    Users Country Flag VinkoCM's Avatar
    Join Date: Nov 2009
    Location: Ottawa, Ontario, Canada
    Posts: 65

    Hi John. When I calibrated my previous lens, I followed your explanations and I had no problem at all. It was a Canon 18-55mm lens. I don't think my problem had anything to do with your explanations and tutorial.

    Because I could not get a good stitch, I restarted from zero. I dismantled everything and started from scratch and everything worked fine. Maybe the camera mounting plate twisted or shifted.
+ Reply to Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts