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Sightron Big Sky 12x

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/26/2012 at 21:43
Airlando View Drop Down
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Hi everyone. I just purchased the 12x fixed Sightron Big Sky to put on a High Wall 22-250. The scope does not seem as sharp as it should be. It is slightly behind an ancient Burris Signature 6-24 (set to 12x), which is the only other 12x I could use to compare. More troubling is that looking through it, even briefly, causes me eye strain and a headache-like effect. Does anyone else have experience with this scope? Should I return it for a different model, or have sightron fix it? I have 2 other Big Sky Sightrons that I am very happy with, and I had high expectations for this one.

Thanks in advance,
Ed
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/27/2012 at 08:21
biggreen747 View Drop Down
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Is your eyepiece/reticle focused correctly. I have the fixed 24x and have no issue at all with mine. Glass is unbelievably clear for a 24x in mine so a 12x should be even better.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/27/2012 at 09:01
Airlando View Drop Down
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I initially made the reticle sharp by focusing the ocular, then adjusted the objective to focus on distant signs and branches. When they did not seem as sharp as expected, I tried minor adjustments to the occular and was unable to find a satisfactory setting. My 3-9 Big Sky AO is my favorite scope. I used the same process on this scope as I did with that one, though the 3-9 didn't require much effort.
Ed
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/27/2012 at 10:02
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I think this is a diopter issue or something else.
 
The 12x you are referencing to is a scope that resoloves things very well.
 
You chould be able to view anything without strain to your eyes. 
 
Bright light or sun and adjust to picture perfect sharp reticle, should solve this.
 
 
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/27/2012 at 12:07
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Originally posted by Airlando Airlando wrote:

I initially made the reticle sharp by focusing the ocular, then adjusted the objective to focus on distant signs and branches.
Ed


What AO setting did you use when you adjusted the diopter?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/27/2012 at 12:39
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That is a good question. I do not know what the AO was set to when I initially tuned the ocular. I recall that it was set too just over 500 when I was checking it against the sky yesterday, while trying various ocular settings.
Ed
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/27/2012 at 12:45
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When adjusting the diopter the AO needs to be at infinity.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/27/2012 at 12:46
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A/O should be set to infinity when adjusting the ocular
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/27/2012 at 13:12
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Hmm....that seems vaguely familiar. I should have checked the instructions. Thanks everyone for the input. I will give it another try when I get home.
Ed
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/27/2012 at 16:26
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I checked the ocular focus with the AO set to infinity, it was not optimum. I did some cranking and got it better. I would say it is an improvement, but the Burris is still clearer and easier on the eyes. To be fair, 12x indicated and 12x actual may be two different things on the Burris. Set on about 10.25 indicated the Burris and Sightron were about equal in discerning twigs around 600 yards. I am still unsure about the scope. It seems like it is not as crisp at the center as it is halfway to the edge of the view. There is a pretty big window, more than a half turn, where the reticle is sharp. Maybe I am not finding the best setting. My eyes are worked now and need a rest. Any more input would be welcome. Thanks.
Ed
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/28/2012 at 15:56
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One final update, so I do not discourage anyone considering this scope. I backed off the ocular in the direction of the least correction (while maintaing reticle focus). Looking with fresher eyes I am satisfied with the clarity. I believe my improper setup was the main problem, some eye health issues probably didn't help. Thanks to those who straightened me out.
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