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Low power scopes

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/29/2007 at 09:06
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Optics GrassHopper
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Went out the other night during full moon and looked at a cow in pasture about 200yds away.Scopes were sightron SII 3-9x42,burris ffII 3-9x40,and simmons whitetail expedition 1.5-6x32WA.I could see clearer with the simmons.Does the lower power scopes allow more light transmission?Confused
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/29/2007 at 09:12
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What power did you have the Sightron and Burris set at? Lense quality and coatings make a difference but getting the exit pupil down below five hurts brightness quite a bit.

 



Edited by tahqua - November/29/2007 at 09:13
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/29/2007 at 09:25
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Did you set all the scopes at the same power?  Probably left the 3-9 scopes on 9x didn't you. Next outing take those 3-9x40 scopes and look at it at 9x then dial it down to 6x and watch how much brighter it gets. The amount of light that reaches your eye is effected by several factors the two primary factors are the size of the objective (front lens) divided by the power at which the scope is set. Example a fixed 6x42, take 42mm divide by 6x and you have a 7mm exit eye pupil. That is as bright as you are likely to be able to use as a young man and the amount your eye will dialate to decreases with age so at 50 your eye may only dialate to say 5mm.  Additionally the quality of the glass and the special coatings that are applied to that glass make a big difference.  Lay each of those scopes next to each other at 3x and put a Kahles or Swarovski next to them at 3x and the expensive scopes will show a remarkable difference - that difference is why they get the kind of money the cost.  Just realize that as it gets dark you need to dial down the power to brighten the image.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/30/2007 at 02:36
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Lower power will allow more light. Also, higher magnification requires higher quality glass.

6x42 is a nice size scope. Even the lower priced ones such as the K6 are adequate.

If someone is on a budget and cannot afford a good quality variable, they'd do better with a more affordable fixed 6x or 4x than a variable that is at the same price level.    

I wish Weaver made a K5!

Smitty


Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/30/2007 at 08:52
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Optics GrassHopper
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I run them through the settings  3-9 and 1.5-6.I looked through them all at 6 to start with.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/30/2007 at 08:59
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The Simmons being the brightest when all are @ 6x is indeed surprising.
A friend of mine is ordering a 3-9 Elite 4200 because his Whitetail wasn't any good for the last fifteen minutes of legal hunting time up here in MI.
Thanks for getting back
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/30/2007 at 10:05
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you must have a bad sightron if it was beat by that simmons. SII's are supposed to be pretty darn good optically.
 
J
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: November/30/2007 at 16:45
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Optics GrassHopper
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maybe the sightron is out of focus.I've never had it on anything.The burris was on my 270 and I just decided to put the low power simmons on because I was going hunting in woods where max shot would be 30 yds.Has anyone used the sightron SII 1.5-6x42 or the bushnell 4200 1.5-6x36?
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/01/2007 at 07:13
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Optics GrassHopper
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If you divide objektive diameter with magnification you will get a value, if this 5 or more then low light capabilities are optimized. For instance 6x42 gives you 7. Then the glass and interior tube quality is very important to have any use of the low light qualities.
Hope this helps you a little bit. Good hunting.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/01/2007 at 16:49
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Originally posted by 308ENCORE 308ENCORE wrote:

Has anyone used the sightron SII 1.5-6x42 or the bushnell 4200 1.5-6x36?


If you keep both at your eye exit pupil size or lower the 4200 seems to have a skunch (sp?) better resolution and brightness. To really see this heres a method to try that separates the real good scopes from the pretty good scopes. Set up a textured object of black, brown, or grey up just inside some woods cover where it can be seen. Get back about 75-100 yds if possible and start watching the object about 15 minutes before sunset. Every couple minutes check the object with each scope being compared and note when it disappears from view for each scope. I use a piece of deer hide and you will quickly see the subtle difference between various scopes with this test. Being back slightly in the woods will introduce shadows and the texture will really show up the resolution ability of each optic. Not lab conditions but a real good way to mimic real woods hunting conditions. Make sure each scope is focused for your eyes and set them on something to eliminate shake and wobble. I sort of feel the big sky sightrons improved lens coatings are more the equal to the 4200's. Always try to compare on equal power settings to avoid skewering the results as said above. Good Testing!

    Focus
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: December/01/2007 at 21:08
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Optics GrassHopper
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The sightron I have is the older SII.
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