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what Rings ?

 
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Old 12-16-2008, 09:33 PM
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Join Date: Dec 2008
Posts: 6
what Rings ?

looking at buying my first nightforce, a 5.5-22x56 what size rings do i need for a strait taper barrel?
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Old 12-17-2008, 02:49 AM
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Join Date: Jun 2004
Location: Sacramento
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Re: what Rings ?

You can go with rings that have a center height of 1.0”. I would recommend going with the 50mm over the 56mm.

Here is some info:
The average size of a human’s eye pupil at night is 7 mm and in daylight it is about 4mm on average. If the optic give you a 7mm of exit pupil and you are using it for day use more than half the light will not reach the retina. I have also noticed if you are getting too much light and you look away you see light spots were ever you look and the targets look washedout. On a lot of my scopes I use a light reducer so I do not get the light spots and the washout is not there.

Size of bell divided by magnification = exitpupil. Hare are some examples.
56/22x=2.54mm
56/5.5x=10.18mm
50/22x=2.27mm
50/5.5x=9.09mm
The sweet spots for the 56 and the 50mm at Night and Day use.
50/7.14x = 7mm night use and for day use 50/12.5x = 4mm
56/8x = 7mm night use and for day use 56/14x = 4mm
You are really not getting much advantage over the 50mm. I feel there is a bigger disadvantage and that is you have to go with tall rings 1.00” at the low to 1.25” were the 50mm you can do 0.885”.

Mike @ CSGW
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