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Rolling Ball affect?

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/22/2011 at 14:32
muddy View Drop Down
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So I've never heard of this until the past few days and hear that Swaro's tend to have it, especially the EL's?  Now that I've just bought EL's I'm worried it will affect me.  That being said would I have noticed it in the month I had the binos in house and using them daily to pan around the timber in my back yard and while out shed hunting?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/22/2011 at 15:08
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Rolling ball is the Illusion while panning that the image is rolling like a marble on a table. This is caused by a lack of pincushion distortion. When the field is too flat in a binocular, rolling ball occurs. Some are more sensitive than others. In any case, the EL does not show this, as the designers intentionally put in pincushion distortion. It is the Swarovision EL that shows the effect (2010 and newer).

Edited by Bitterroot Bulls - February/22/2011 at 15:18
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/22/2011 at 15:22
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In fact, most optical designers intentionally incorporate some pincusion distortion in the view to counter the rolling ball effect, which, like most all other optical aberrations, some find more objectionable than others.  The new "Swarovision EL" has a field flattener to eliminate linear distortion and try to get the largest sweet spot possible, sharp out to the edges of the field.  They succeeded in doing so, at the expense of the rolling ball effect when panning.  Tradeoffs are almost always inevitable whenever a designer tries to optimize one or more optical characteristics.  In this case, some will find the advantages of a flat field and huge sweet spot worth the negative tradeoff when panning and others won't. 
 
If your EL isn't one of the new "Swarovision" models, this doesn't apply to your binocular.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/22/2011 at 15:27
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The older EL's large "sweet spot" is just fine with me.   Big Smile
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/22/2011 at 15:55
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If you do not see, do not look for it.  Some people find it disturbing and some hardly notice it.  It is very individual.

ILya
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/22/2011 at 16:06
Klamath View Drop Down
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Originally posted by muddy muddy wrote:

So I've never heard of this until the past few days and hear that Swaro's tend to have it, especially the EL's?  Now that I've just bought EL's I'm worried it will affect me.  That being said would I have noticed it in the month I had the binos in house and using them daily to pan around the timber in my back yard and while out shed hunting?
 
If you have had them for a month and IF they are the new Swarovision EL you would have noticed it.  It only took a couple of minutes for it to jump out and bust me when I first saw the new SV EL.  Since there have been lots of price reduction "move 'em out" sales on the remaining non SV models, you may well have gotten the old one.  Don't know because that wasn't clear from your post.
 
So take Koshkin's advise and forget about it.  There is absolutely no sense in worrying about it.  Many "optics afflictions" are in fact self inflicted.  If you don't see a fault, don't look for it just because you heard someplace this or that binocular is supposed to have this or that fault.  It does not mean you will be able to see it or should even waste energy looking for it.  Just use whatever EL it is you have and enjoy it.  You have as good a binocular as your money can buy in the first place.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/22/2011 at 17:53
RifleDude View Drop Down
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Originally posted by Klamath Klamath wrote:

So take Koshkin's advise and forget about it.  There is absolutely no sense in worrying about it.  Many "optics afflictions" are in fact self inflicted.  If you don't see a fault, don't look for it just because you heard someplace this or that binocular is supposed to have this or that fault.  It does not mean you will be able to see it or should even waste energy looking for it.  Just use whatever EL it is you have and enjoy it.  You have as good a binocular as your money can buy in the first place.
 
Amen!  You can worry yourself to death over this or that percieved "fault."  You only have to please your own eyes.  Every binocular has one negative trait or another that some users won't like.  Every single one of them, at any price.
 
The ELs are great binoculars... among the best in the world.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/22/2011 at 22:19
muddy View Drop Down
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They're the "older" ELs with Swarobrite instead of the newer ones.  They're awesome.  If I could post pics I'd show you the 4 point shed I found with a 14 inch G2 while using them.  Big Grin
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/22/2011 at 22:20
muddy View Drop Down
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By the way, thanks for setting my mind at ease.  I wasn't terribly worried since I've been using them for well over a month without noticing anything but awesome.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/24/2011 at 13:10
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The worst rolling ball effect that i have seen was on a pair of Kruger Optical's Malhuer binoculars that my friend bought, even worse than SV.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: February/25/2011 at 08:56
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I definately saw a rolling ball effect when I panned through Sportsmans warehouse while looking through some Pentax DCF WP 10x42. I hope the Pentax DCF SP isnt the same. Thats the only reason I never bought a pair of Pentax DCF SP, I was worried they would do the same. I hate the rolling ball effect.
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