M8 or FX-3 6x42?

DGY

DGY

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Looking for a fix 6x scope, and was wondering what are the big differences between those two?
Age for sure, price on the EE also… but in term of brightness, toughness, reliability etc?
 
Depends on the clarity of the scope.
I have an M8 4X that is way clearer than the VXIII 1.5x5 here.
Can't figure this one out.
Buddies call the same shawts on clarity too.
 
Thanks guys! I’m not sure I could see the difference in clarity either! Clicks are nice but friction works I guess.
 
OP - you might want to know that the M8's came with at least two size front ends - pretty sure I have three that are 36 mm, but some were made with 42 mm - I do not know about the FX-3, though - is just something you might want to be aware of?
 
Potashminer said:
OP - you might want to know that the M8's came with at least two size front ends - pretty sure I have three that are 36 mm, but some were made with 42 mm - I do not know about the FX-3, though - is just something you might want to be aware of?
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Yes I know that, and I think the 42 is what i’m after! More light, wider field of view?
 
Is an optics thing, I think - exit pupil is going to be magnification divided into objective lens diameter, so for 6X setting, is one 6th (?) the diameter of the objective lens - so with 42 mm divide by 6 = 7 mm exit pupil. With 36 mm objective, divide by 6 and get about 6 mm exit pupil. So the 42 mm is "brighter", if your eye can use that. I found as I got older that my eye's pupil gets smaller - I doubt that I get to much more than 4 mm any more - so that means the 6x36 puts out more light than my eye can use. Yes, the 42 mm will pass through even more light, but my eye can not use that, either - I think. Younger folk (teenagers) might have eye pupils that open to 8 mm or more - so they would most definitely be able to see the "brighter" image.

Perhaps is why on a 4-12x40 scope - so 12 power is 3.33 exit pupil - most will see that as "dim". 8 power is 5.0 mm exit pupil - many will see that as a brighter image than when set at 12X. 4 power is 8.0 exit pupil - because of our eye's pupil dilation, many may not see much "brightness" difference between 4x and 8x in that scope.

I am not sure about "field of view" - I thought that was controlled by the eye piece lens diameter, but I might have that wrong.
 
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Potashminer said:
Is an optics thing, I think - exit pupil is going to be magnification divided into objective lens diameter, so for 6X setting, is one 6th (?) the diameter of the objective lens - so with 42 mm divide by 6 = 7 mm exit pupil. With 36 mm objective, divide by 6 and get about 6 mm exit pupil. So the 42 mm is "brighter", if your eye can use that. I found as I got older that my eye's pupil gets smaller - I doubt that I get to much more than 4 mm any more - so that means the 6x36 puts out more light than my eye can use. Yes, the 42 mm will pass through even more light, but my eye can not use that, either - I think. Younger folk (teenagers) might have eye pupils that open to 8 mm or more - so they would most definitely be able to see the "brighter" image.

Perhaps is why on a 4-12x40 scope - so 12 power is 3.33 exit pupil - most will see that as "dim". 8 power is 5.0 mm exit pupil - many will see that as a brighter image than when set at 12X. 4 power is 8.0 exit pupil - because of our eye's pupil dilation, many may not see much "brightness" difference between 4x and 8x in that scope.

I am not sure about "field of view" - I thought that was controlled by the eye piece lens diameter, but I might have that wrong.
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Really good info! Thanks
 
DGY said:
I found one M8 6x42 on the EE, it should get in the mail tomorrow!
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I sure hope it works out for you.
Even with my less than 40 vision shewt'in eyebawl, I prefer the M8 4X over the 6X.
Jest seems to be more clear up to 100 yards.

Edit, maybe "clear" is not the werd, yewsable?
 
kamlooky said:
I sure hope it works out for you.
Even with my less than 40 vision shewt'in eyebawl, I prefer the M8 4X over the 6X.
Jest seems to be more clear up to 100 yards.

Edit, maybe "clear" is not the werd, yewsable?
Click to expand...
Well we’ll see soon enough if it work or not! I ha e a few 4x, not M8 but should still be able to compare somewhat!
 
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