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40mm vs 50mm in new VX3

 
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  #1  
Old 08-25-2009, 10:27 PM
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40mm vs 50mm in new VX3

I have read before that a 40mm objective scope with good coatings is just as good, if not better, than a 50 mm objective scope with slightly lower quality coatings.
My questions is: With the new "high tech" coatings of the VX3, is a 4.5-14x40mm scope a better choice than a good 4.5-14x50mm scope? It will go on a custom built 7mm SAUM deer/antelope killing machine. I was dead sent on a 4.5-14x50mm from Grey Bull, but I'm checking out other options. Any advice?
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  #2  
Old 08-26-2009, 08:10 PM
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Re: 40mm vs 50mm in new VX3

I had heard the same thing about the 40mm & 50mm so I decided to get a 4.5X14X40 VX3 without the side focus or adjustable objective and I don't really like it. It seems to be dark and I can not seem to get it to focus to my eye very well. The glass seems to be no better than a burris fulfield II to me, now that being said I haven't had a chance to try it at dawn and dusk. I was out the other day with a rifle that had a zeiss conquest 3X9X50 and it was brighter and clearer than the Leupold. If i were to do it all over again I would get the 50mm with the side focus.
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  #3  
Old 08-26-2009, 10:21 PM
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Re: 40mm vs 50mm in new VX3

Quote:
Originally Posted by JARHEAD1371 View Post
I have read before that a 40mm objective scope with good coatings is just as good, if not better, than a 50 mm objective scope with slightly lower quality coatings.
My questions is: With the new "high tech" coatings of the VX3, is a 4.5-14x40mm scope a better choice than a good 4.5-14x50mm scope? It will go on a custom built 7mm SAUM deer/antelope killing machine. I was dead sent on a 4.5-14x50mm from Grey Bull, but I'm checking out other options. Any advice?
The 50mm lens will gather more light normally in the same brand scopes than the 40's.

The main advantage to the 50's if they have 30mm tubes is they can also have side focus
and can have more elevation and windage adjustments (Clicks) also they can be shorter/
more compact.

The downside to the 50mm scopes is that have to set higher on the rifle and the bell may
be wider than the rifle for-end placeing them in harms way.

We all shot the 40mm scopes for years but now there are bigger and better scopes available.

J E CUSTOM
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  #4  
Old 08-31-2009, 11:19 PM
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Re: 40mm vs 50mm in new VX3

Ah, the ole 40 vs 50 mm debate. JE Custom pretty much hit the main points. IMHO, 50mm's really belong on on a few rifles, namely benchrest and prairie dog rifles. The 50mm does gather more light, but I have always been able to see through my 40's way before legal shooting light. 50mm sit very high on a hunting rifle, and do stick out width wise making them susceptable to damage. 50mm are also usually quite a bit more coin versus what you would pay for the 40mm. Also, if you need the extra adjustment and side focus, there are numerous 40-44mm models out there with 30mm tubes. Basically, going to 50 mm has alot more to do with marketing and keeping up with the Jone's then actual need.

As a long time Leupold fan, I was very dissapointed with the VX3 as well. The VX-III's one weakness was low light,and I don't really see where the new coatings are much improvement in that catagorey. Others may and will disagree. I think Leupold was number 1 for so long they started resting on there laurels until the other scope makers caught up, and even passed them. Bushnell is a great example. The 4200/6500 Elite glass is manufactured for them by Wonder Optics in Japan and is excellent...and the 4200 series is alot cheaper then the VX3.

Your best bet is to shop around and look at the other competitors like the Bushnells, Zeiss Conquest, Sightron SII Big Sky or Hawke Frontier. You'll find you can get the same glass for alot less, or much better glass for only a few bucks more. Your Eyes May Very.
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  #5  
Old 09-02-2009, 02:42 PM
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Re: 40mm vs 50mm in new VX3

For me the 50mm is better for the following reasons:

• Better resolution. With all other factors being equal a larger objective will offer better resolution or the ability to see detail better. A scope with better resolution will offer better low light performance.

• Larger exit pupil. A larger exit pupil allows the shooter to better spot his own hits and to acquire targets faster under stress.

o At 14X a 50mm has an exit pupil of 3.6mm
o At 14X a 40mm has an exit pupil of 2.9mm

• Slightly shorter overall length makes up for the slightly larger objective

• My stocks have very little drop at the comb to keep the recoil straight back and to minimize muzzle climb. I mount all my scopes 1.7 above bore line and this clears either 40mm or 50mm with my barrel contours.

I am going to agree that the imported glass has gained a lot over the years but disagree that Leupold has not gained. The trend is everyone's glass getting better and the choice comes down to other factors such as drop compensating turrets, reticle options, MOA per rotation, repeatable adjustments, ultimate durability, compact size, warranty service, ect.

I can build the Greybull Precision Hunting Optic on a 40mm if someone wants it and we used to sell about 1 out of 20 with the 40mm although we seem to be selling fewer nowadays. We don’t have 40mm in stock so expect about 3 weeks to get a 40 if you decide it is a better fit for you and your applications.
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  #6  
Old 09-03-2009, 02:30 PM
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Join Date: Jan 2006
Posts: 246
Re: 40mm vs 50mm in new VX3

I called Leupold about this question as I'm buying a new scope.

40mm or 50mm?


Leupold says there is no difference.

I will say this, I have the older vxlll and a new vx3 in 4.5x14 LR.

For my eyes there is a big difference with the new vx3 coatings.

Better with the vx3.
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  #7  
Old 09-03-2009, 04:41 PM
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Location: Alaska
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Re: 40mm vs 50mm in new VX3

Quote:
Originally Posted by su37 View Post
I called Leupold about this question as I'm buying a new scope.

40mm or 50mm?


Leupold says there is no difference.
Could you clarify? No difference in what between the 40 and 50mm?
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