panorama software,virtual tour software
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Joined: 2005-07-20
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2007-11-13
#1

Sigma 8mm - worrying out loud!

So I got the new Sigma 8mm lens for my Nikon 200D.
I'm just worried though because I won't get a chance to play with this combo until Sunday night and I have an important shoot on Monday.

I'm using a Kaidan QuickPan IV Rotator with an added Twin Twin-Axis Adapter - http://www.kaidan.com/images/Std.Brkt.Twin_Axis

Has anyone any tips for finding the Sigma nodal point. I'm gathering as much reading material as possible until Sunday.

Thanks..I know it's a repeated question!
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2007-11-13
#2
Thanks smooth - your help is much appreciated.
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Joined: 2004-04-14
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2007-11-13
#3
Yep! That's the advice that smooth and texas360 gave me.

Thank goodness for theirs and others' help and patience. :)

r,
eagle
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2007-11-20
#4
Guy - the photo shoot went really well and we spent a few hours the night before and got the Nodal Point sorted. Thanks again.
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2007-11-20
#5
Ahhh but only after stitching will you learn how well you did.
/s/
Dave
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2007-11-20
#6

Great to here you got it set up well enough to do the shoot. Don't be scared to show some results if may help you get an even better result.

Regards, Smooth


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2007-11-13
#7

Get the "Gold Ring" over the X & Y Coordinates of the Tripod centreline. To help, use the centre focus point through the view finder with the camera tilted 90 degrees looking down onto the tripod centreline.

You are trying to set the lens at the No Parallax Point (NPP) not the Nodal Point. The Sigma 8mm is very close on the gold ring although some tiny adjustment will be needed for perfection. The Gold Ring is close enough to get you going with minimal errors.

Another process is to use a "Plumb Bob" weighted with fishing line around the thin groove at the front of the kens.

Be 100% sure you slide the "complete" lens cap of the front of the lens (it is made of two pieces)

Set the aperture at F/8.0 and adjust the shutter speed to match the internal light meter -2EV|---|---|+2EV  the centre is 0EV and for this the camera should be set in full (M) manual mode. Make sure the ISO is at it's lowest numeral setting (especially on the Nikon) ISO 100 would be correct for a Canon DSLR.

Shoot RAW (.nef) so at least you can rescue if needed. If your camera can do .nef & .jpg at the same time all the better.

Good luck, I have offered my best advice.

Regards, Smooth