(meteorobs) Fisheye lens misunderstanding and photography update

[Peter Hirons]

I wouldn't call this aliasing - it's just the effect of the fish-eye lens
in turning straight lines into curves.  Try taking a photo of a building
in daylight. 

You can get software to correct this, but I'd stick to a linear lens as
wide as you can get.  You probably only want to be looking towards the
radiant most of the time anyway.

Peter

-----Original Message-----
From: meteorobs-bounces at meteorobs.org
[mailto:meteorobs-bounces at meteorobs.org] On Behalf Of Thomas Ashcraft
Sent: Monday, December 07, 2009 6:57 PM
To: Global Meteor Observing Forum
Subject: Re: (meteorobs) Fisheye lens misunderstanding and photography
update


> Could you post an example of one of the meteors you shot that has a 
> "spiral look"?
> Leo
>
>
>
>   
Leo, Chris and all,

I posted a hasty web page of a meteor showing the unwanted effect.

http://www.heliotown.com/Meteor_Test_Shots.html

I also posted a photo of a more natural looking meteor taken with the
18-55 mm kit lens that came with the camera which is at the bottom of the
web page.

TA

**********

Thomas Ashcraft
New Mexico


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