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Leupold 3.5-10X50 B&C

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Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/11/2007 at 22:07
billiam13 View Drop Down
Optics Apprentice
Optics Apprentice


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Is it worth getting the 30 mm tube over the 1 inch tube. If you are sighting in at 200 yards, which is what the Boone and crokett reticle calls for, you wont need that much scope ajustment. And if the 30mm doesnt gather any more light than the 1 inch, I cant see the reason to get it. I would think the 1 inch would be just as goos for less money. Am I right in assuming this. Also is the 4.5-14X56 gonna be any brighter than this 2.5-10X50??
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/11/2007 at 23:38
asphunter View Drop Down
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Larry Root

Joined: March/01/2007
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According to the leupold tech I spoke with, the only advantage of the 30mm is more W&E adjustment
and (off the record) to look "cool".
If you sight in 3" high at 100 (Thankyou Jack O'Connor) and you are shooting deer size game or bigger
you dont need any BDCs BCs or all the other busy stuff sold by marketeers today. Your point blank range to hit a
12" pieplate with a 30-06 class cartridge will extend from zero to 300 yards. Most of the really experienced
hunters who write for a living will admit that 300 is a fur piece to be shooting at things that can move
unexpectedly.
If it's small varmints that's a different story as there is time to dope out the range, wind etc. and a holdover reticule
can be useful. I have the 8 dot varmint reticule in my 4-16x50 Schmidt & Bender and find it useful for prairie dogs
in conjunction with a good laser range finder.here's the 8 dot

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/12/2007 at 02:38
sscoyote View Drop Down
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Optics Journeyman


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If u sight in for a conservative PBR for big game, then the B&C reticle will get u out as far as u'll ever need to go on big game, as the B&C's lower post tip will net u almost 8 MOA of trajectory compensation at the highest power.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/12/2007 at 10:50
Dale Clifford View Drop Down
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Joined: July/04/2004
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If you thinking leo here, the biggest advantage to going to the 30 tube is the not the tube but the 30 which only comes in the vx3 have better 1/4 " click adjustment and the dials, glass are better.

a 56 mm over a 50 "extends" the exit pupil avaliabilty at an given magnifaction, thus a 56 may have a 5 mm exit pupil at 12 power whereas the 50 may only have a 5mm at 10 mm. as an example.

 

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/12/2007 at 19:55
billiam13 View Drop Down
Optics Apprentice
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Dale I didnt quite understand youre post. Can you run it by me one more time. If I understood you right, you said that only the vx3 comes in 30mm tube. The VXL comes with 30 mm tube also. Isnt the VXL better glass and stuff than the VX3?? Are the dials and ajustments the same in both scopes??
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/12/2007 at 22:03
Dale Clifford View Drop Down
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According to leo (and the price structure) the VXL should be better as you suggest. and yes the vx in 3 and L are 30 mm tubes. but there adjustments are different than other scopes in the Leo line (II on down). The adjustments are better than they every have been. in both the L and the 3. which leads me to say you have to get the 30 mm tube to get those. Even though the B&C reticle will allow almost all the hold over you need, the quality increases in the other parts warrants the price increase over a 1" tube.  The whole set is that much better.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/12/2007 at 22:23
billiam13 View Drop Down
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I was going to get the 3.5-10X50 VXL but I was going to get the 1inch tube. I didnt see the need for the 30mm tube. I thought the only advantage to the bigger tube was the range of clicks. I didnt know that there was an internal difference between the 1 inch tube and the 30 mm tube as long as they were both in the VXL line. I thought they were opticly and quality equal.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/13/2007 at 10:44
Dale Clifford View Drop Down
Optics Jedi Knight
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Ok with you now- I don't know if the 1 inch tubes have the same type -- I've only seen the 30mm tubes. why leo has two tube sizes can only be chalked off to any one one of the other dumb stuff they have done. I am assuming at this point they are using a two piece on the l" and a single tube on the 30 mm. The two best scopes leo has made are the 3.5x10 vxiii and the 6.5x20 vxlll. the vxl will only give you 1mm more exit at 10 over the older 3.5x10. 40-- is the 50 mm worth that much more? I doubt it.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/14/2007 at 13:40
8shots View Drop Down
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Lord Of The Flies

Joined: March/14/2007
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All I have read indicates that there is no performance differece between a 1 inch and a 30mm tube other then better internal light management, hence most European scopes are built on a 30mm tube.

The eye has average a pupil size of 4mm in sunlight and 7mm at night. So a 4,5-14 x56 will give an exit pupil of 12 on the 4,5 setting and 4 on the 14 power. So in normal good light conditions you will have full benefit of all the light gathering abilities at maximum and minimum power.

The 3,5-10x40 will give an exit pupil of 11,4 on the 3,5 power and 5 on the 10 setting. Anything above the 4mm or maybe 5mm if you are older will gather the same or more light then your eye can absorb. So for normal sunny to slightly clouded weather a 40mm objective lens is all you need.

I have a 3,5-10x40mm VX111 1 inch tube for hunting and have no hassles on sunny to cloudy days. Long shots on overcast days stretches it abit, but I will not change the scope for a 50mm only because of bulk, which one would like to keep to a minimum when carrying.

I also have the 8,5-25x50mmVX111 30mm tube and to date have had no hassles with light gathering. I have only purhased it recently and have not tested it on cloudy days.

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/14/2007 at 14:38
Dale Clifford View Drop Down
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any exit pupil available by the scope above 5-6 is not usable by the eye.
Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/14/2007 at 17:24
8shots View Drop Down
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Lord Of The Flies

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Correct for day time, which means you can go to a smaller objective lens. But the exit pupil must not be smaller than your pupil. Then you must go to a bigger objective lens.So as long as you you are above  4 you are receiving all the light your eye can use and then some. If you are below 4, less light then can enter your eye is being let through by the scope, leading to a less bright picture..

Why does the diameter of the exit pupil matter? It doesn't as long as there is enough ambient light so that the pupils of your eyes are smaller than the exit pupils of your binoculars. But when the ambient light gets dim, and the pupils of your eyes adapt by enlarging, the exit pupils of your binoculars may become the limiting factor. With the 8x25 as example, when it gets dim enough for the pupils of your eyes to exceed 3.1mm in diameter, the scope are restricting the light available to your eyes. Ideally, human eyes in excellent condition can achieve about a 7mm pupil opening, so a 3.1mm exit pupil from your binoculars can be quite limiting in dim light. You can probably see more without your scope. But the 7x50 scope for example have 7.1mm exit pupils, as large as young, fully dark-adapted human eyes, so they never limit what you can see, even at night.

Post Options Post Options   Thanks (0) Thanks(0)     Back to Top Direct Link To This Post Posted: March/15/2007 at 08:12
Dogger View Drop Down
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Have read in other posts that an exit pupil exceeding pupil size provides an additional benefit in decreasing eye fatigue because absolute eye position in relation to the exit pupil is less critical.  Whether this is worth the additional weight/cost or objective size is a personal matter.  I have not verified this myself.
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