TAKO. INTERNET SEIT 1996.
Olympus-OM

[OM] Re: Calculating parallax error, was: Panorama Heads

Subject: [OM] Re: Calculating parallax error, was: Panorama Heads
From: Chuck Norcutt <chucknorcutt@xxxxxxxxxxxxxxxx>
Date: Sun, 26 Aug 2007 07:13:27 -0400
Sorry, forgot to post the link
<http://www.tawbaware.com/maxlyons/calc.htm>

Lots of other good photo calculator tools here too besides the parallax 
error stuff.

Chuck Norcutt

Chuck Norcutt wrote:
> I figured this had to exist somewhere.  I looked around and found a nice 
> page of photo related calculators one of which is the amount of parallax 
> error from being off the no-parallax-point.  The output is specified in 
> terms of degrees and also number of pixels in the image.  Focal length 
> is not mentioned as an input parameter but is certainly there in another 
> form which is the image field of view.  From another page I found some 
> discussion of having reasonable stitching results with errors of about 6 
> pixels.  But there are probably a lot of caveats around that number.
> 
> Anyhow, after playing around with the calculator a bit (and assuming the 
>   "nodal point offset" is about equal to the focal length of the lens 
> away from the tripod socket) it appears that one can make a rough 
> generalization for 35mm frames that no panorama head is needed if the 
> closest object is at least as far away in feet as the twice the focal 
> length of the lens in millimeters.  eg; if you're shooting with a 50mm 
> lens and the closest object is 100 feet away you'll probably do OK with 
> no panorama head.  You may even get away with less but, YMMV.
> 
> Chuck Norcutt
> 
> Chuck Norcutt wrote:
>> I should also have added; before running out to buy a pano head try 
>> shooting some on a tripod but without a head.  You may find that you 
>> really don't need a head.  I've probably shot less than 15 or 20 panos 
>> but I don't have a head and haven't needed one.  Probably half of them 
>> are shot hand held and are also successful.  But shooting hand held I 
>> still try and make my body mimic the rotation on a tripod head.  All of 
>> my panos are landscape type with the subject probably at least 2500 
>> times the focal length of the camera away from me.  There's a value 
>> somewhere in the void and I don't know what it is that says if the 
>> subject is X times the focal length away you don't need to worry about 
>> parallax error.
>>
>> Chuck Norcutt
> 
> ==============================================
> List usage info:     http://www.zuikoholic.com
> List nannies:        olympusadmin@xxxxxxxxxx
> ==============================================
> 
> 
> 

==============================================
List usage info:     http://www.zuikoholic.com
List nannies:        olympusadmin@xxxxxxxxxx
==============================================

<Prev in Thread] Current Thread [Next in Thread>