R1 NPP: sigma 8mm F3.5
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  1. R1 NPP: sigma 8mm F3.5

    #1
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    Time to make the rail stop. Can anyone confirm my findings?

    Sigma 8mm f/3.5 DG for Nikon
    4 shots around
    Tilt angle----------NPP value

    +7.5?---------------0.15
    +5?------------------0.5
    0?--------------------1.2


    Sigma 8mm f/3.5 DG for Canon
    4 shots around
    Tilt angle----------NPP value
    +7.5?---------------1.65
    +5?------------------1.95
    0?--------------------2.65

    Let me know if you find any discrepency.


    Nick




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  2. Re: R1 NPP: sigma 8mm F3.5

    #2
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    any one use my Sigma 8mm F3.5 for Nikon setting?

    Nick



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  3. Re: R1 NPP: sigma 8mm F3.5

    #3

    Hi, I thought your Appendix 1 mentioned as follows:
    Sigma8 f3.5 For Nikon
    (4 shots around)
    R1---------------Tilt Reading
    +12.5?-----------0.70
    +7.5?-------------1.25
    +5?--------------- 1.60
    0?------------------2.25
    -2.5?---------------2.55
    -7.5?---------------3.75

    But I am having some parallax problems using the above. I will try your settings tommorow morning.

    Quote Originally Posted by nick fan View Post
    Time to make the rail stop. Can anyone confirm my findings?

    Sigma 8mm f/3.5 DG for Nikon
    4 shots around
    Tilt angle----------NPP value

    +7.5?---------------0.15
    +5?------------------0.5
    0?--------------------1.2

    Let me know if you find any discrepency.

    Nick
  4. Re: R1 NPP: sigma 8mm F3.5

    #4

    Hi Nick

    I am a little concerned about the values you are giving, because there are 2 types of sliders (see attached)

    I had to change my slider because with D3X and 16mm FD you have to push the slider a lot forward so there is very little holding on in the clamp,
    Now that I have the larger one some would not know for which the values are related to

    Let us know which slider for which??

    Regards

    Erik Hoffman
  5. Re: R1 NPP: sigma 8mm F3.5

    #5
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    Quote Originally Posted by erikhoffman View Post
    Hi Nick

    I am a little concerned about the values you are giving, because there are 2 types of sliders (see attached)

    I had to change my slider because with D3X and 16mm FD you have to push the slider a lot forward so there is very little holding on in the clamp,
    Now that I have the larger one some would not know for which the values are related to

    Let us know which slider for which??

    Regards

    Erik Hoffman
    This is the old slider shown on the left of your photo.
    So add 1 to the values below.

    Sigma 8mm f/3.5 DG for Nikon
    4 shots around
    Tilt angle----------NPP value

    +7.5?---------------0.15
    +5?------------------0.5
    0?--------------------1.2


    For your Nikon 16mm, what tilt angle do you use? The slider at the left should have plenty of room for secured clamping.

    Nick



    Fanotec
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  6. Re: R1 NPP: sigma 8mm F3.5

    #6

    Hi Nick

    Just noticed that the slider supplied with my 16mm AF new 2 weeks ago is the short one

    http://store.nodalninja.com/product_p/u-r-n16.htm

    So now I am more confused if you are saying it is the old one

    Erik
  7. Re: R1 NPP: sigma 8mm F3.5

    #7
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    Quote Originally Posted by erikhoffman View Post
    Hi Nick

    Just noticed that the slider supplied with my 16mm AF new 2 weeks ago is the short one

    http://store.nodalninja.com/product_p/u-r-n16.htm

    So now I am more confused if you are saying it is the old one

    Erik
    For Sigma 8mm Nikon Mount, we changed the slider to provide more room of adjustment recently. Only the Sigma 8mm Nikon Mount is affected.
    BTW, did you get an extra slide (shown at the right) for your Nikon 16mm?

    I had to change my slider because with D3X and 16mm FD you have to push the slider a lot forward so there is very little holding on in the clamp,
    What is the NPP value you use? I thought full frame fisheye users should use 0 or -ve tilt angles to reduce the nadir size. In that case, the short slider is of the right size.


    Nick



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  8. Re: R1 NPP: sigma 8mm F3.5

    #8

    Nick, the setting for the sigma 8mm f3.5 for CANON is the same for 3 shots? eg +5 1.95mm ?
  9. Re: R1 NPP: sigma 8mm F3.5

    #9
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    Quote Originally Posted by nick fan View Post
    For Sigma 8mm Nikon Mount, we changed the slider to provide more room of adjustment recently. Only the Sigma 8mm Nikon Mount is affected.
    Nick,

    I am still using the old style slider purchased back in June of 2009. I am also still using the rail insert you made for me (still prototype at the time) at 1.5. After hundreads of panos, the setting is still working just fine for me. I do not know what the setting would be with the new style slider.

    Dennis
  10. Re: R1 NPP: sigma 8mm F3.5

    #10
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    Quote Originally Posted by fp2008 View Post
    Nick, the setting for the sigma 8mm f3.5 for CANON is the same for 3 shots? eg +5 1.95mm ?
    try 2.25 for you set up.
    follow this guide to confirm the NPP, it is very easy
    http://johnhpanos.com/starcal.htm


    nick



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  11. Re: R1 NPP: sigma 8mm F3.5

    #11
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    Quote Originally Posted by DennisS View Post
    Nick,

    I am still using the old style slider purchased back in June of 2009. I am also still using the rail insert you made for me (still prototype at the time) at 1.5. After hundreads of panos, the setting is still working just fine for me. I do not know what the setting would be with the new style slider.

    Dennis
    New rail adds 1cm to the back of old rail. So add 1 to the setting for the old rail.



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    We listen. We try harder.
  12. Re: R1 NPP: sigma 8mm F3.5

    #12

    Quote Originally Posted by nick fan View Post
    follow this guide to confirm the NPP, it is very easy
    http://johnhpanos.com/starcal.htm
    It is easy, but that's the wrong tutorial. The one you need is http://www.johnhpanos.com/epcalib.htm

    John
  13. Re: R1 NPP: sigma 8mm F3.5

    #13
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    Quote Originally Posted by John Houghton View Post
    It is easy, but that's the wrong tutorial. The one you need is http://www.johnhpanos.com/epcalib.htm

    John
    oops, my apology for my silly mistake. I wonder why I didn't proof read.

    Nick



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  14. Re: R1 NPP: sigma 8mm F3.5

    #14
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    Hi DennisS,

    Sigma 8mm/f3.5 4 shots around, this is what I found:

    +7,5 1,15

    +5 1,5

    0 2,2

    -2,5 2,5

    -7,5 3,1

    You are right, you have to add 1.

    Cheers,

    Heinz

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