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Pincushion AND Barrel Distortion?

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/14/2008 at 17:09
lucznik View Drop Down
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I just read a review where the author claimed to see BOTH pincushion and barrel distortion in the same binocular.  Is this possible?  I always understood the two to be mutually exclusive of one another.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/14/2008 at 19:03
Bird Watcher View Drop Down
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It would certainly seem to be a contradiction.

Distortion

Maybe he was looking through one side at a time, and saw something different in each barrel/tube. That would be pretty wild.


Edited by Bird Watcher - September/15/2008 at 18:47
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2008 at 17:40
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Originally posted by lucznik lucznik wrote:

I just read a review where the author claimed to see BOTH pincushion and barrel distortion in the same binocular.  Is this possible?  I always understood the two to be mutually exclusive of one another.
 
I'm pretty sure that's impossible.  They are exact polar opposite types of distortion, one where straight object lines form a convex curve with the widest point between parallel lines in the center of the field (barrel), the other where the same lines form a convex curve, narrowing at the center (pincushion).
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2008 at 17:47
lucznik View Drop Down
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Gunshow75 actually sent me an explanation of something called a "moustache distortion" or "complex distortion." A quick google search revealed this article from Wikipedia:
 
 
So, contrary to my initial reaction, it would seem that having both such distortions in the same optic is apparently not necessarily contradictory, nor impossible.  Well, I guess that's my "something new" to learn for today...


Edited by lucznik - September/15/2008 at 17:50
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2008 at 17:50
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Interesting.  I've never seen an optic that exhibited such distortion, but I learn new things every day!
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/15/2008 at 23:18
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I not exactly sure waht the exact difference is between the two, I hear many terms used to describe various s flaws and for the most part I think people throw around these terms largely to hear themselves talk. Unless a bino exhibits any of these flaws to the point where the bino causes extreme eye fatigue, I believe a good hunter armed with excellent glassing skills will not be handicapped when it comes right down to his or her personal ability to actually knowing how to glass as to trying to make-up their lack of skil by trying too replace these skills with the latest and greatest. I have seen guides able to locate game with far lessor glass than what folks typically feel necessary to make up for glassing kill. Being able to detect unusual shapes, a tip of a horn and out of place shapes go a lot further in hunter success, than a guide that has the latest and greatest 2K bino. I don't begrudge hunter/guide appreciates the finer things in life, but given a choice, I'll take the seasoned guide with a good pair of bino' and or a spotter every time.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/16/2008 at 09:42
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heres another source that koshkin pointed out in post
Being able to detect unusual shapes 
color rendition and things being out of place----
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/18/2008 at 18:21
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The more complex the optic, the more complex the distortion.  You can have all sort of funny looking shapes near the edges of the image.  Our eyes actually make a pretty decent job of correcting for some of those distortions, but when you take a snapshot with an imager.... let's just say I have seen some really funky stuff, especially with DSLR lenses.

ILya
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: September/24/2008 at 06:17
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Originally posted by Roy Finn Roy Finn wrote:

I have seen guides able to locate game with far lessor glass than what folks typically feel necessary ... Being able to detect unusual shapes, a tip of a horn and out of place shapes go a lot further in hunter success, than a guide that has the latest and greatest 2K bino.
Having been without power for over a week sure makes me appreciate air conditioning.

Roy reminds us of a fundamental truth, that knowledge, not our eyes, might be considered the true organ of sight.
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