Generally speaking, a larger objective lens is best if you're going to be shooting at higher magnification. Your effective range will shorten faster in low light conditions, but you will shoot much more accurately at close range. For low magnification scopes, a smaller objective lens will work well..
Also to know is, what does a bigger objective lens do?
The objective lens is the light-gathering lens at the front of the scope. The larger the diameter of the objective lens, the more light will be admitted into the scope. This results in a larger exit pupil with a brighter image. Most riflescopes have objective lens diameters from 32mm to 44mm.
Secondly, does scope tube size matter? Tube Size Matters – But Not Much. Scopes built on 30mm tubes are inherently brighter, sharper and just plain better than those constructed on 1-inch tubes. Not really. If your scope's exit pupil is smaller than your pupil, it can't transmit all the light you can use.
Keeping this in view, is 50mm Scope better than 40mm?
a 50 mm is a little brighter than a 40 at the same power, and it will allow 1 power higher magnification to equalize with the 40mm. SO yes, a 50 mm is better than a 40mm but not a whole lot. And it will only be noticable in lower light situations. And it is only worth about 1 power setting.
What is the advantage of a 50mm scope?
So, for more flexibility with using higher powered optics especially in low light conditions, a 50mm objective lens is the best choice. Another benefit to having a large exit pupil is that you'll have greater flexibility to look through the scope and get on target in a hurry.
Related Question Answers
Is 30mm bigger than 1 inch?
A 1 inch rifle scope has a main tube diameter of 1 inch, or 25.4mm. A 30mm scope's main tube is 30mm thick, obviously. This was originally due to differences in manufacturing methods and the fact that European manufacturers used the metric system. However, a 30mm scope does offer two advantages over one inch scopes.What is objective size in a scope?
For example, a 3-9×40 scope has a magnification range of 3-9x and an objective lens diameter of 40mm. What is the objective lens? Simply put, the objective lens is the lens of the scope that is closer to the target. It's the opposite of the eye piece, which is closest to your eye.What does 4 16x50 mean on a scope?
In the model name "4 X 32," the number four refers to the magnification power of the scope. A 4-power scope enlarges the image four times. Every lens in a scope robs a tiny bit of light that tries to pass through, so the higher the magnification, or the more lens coatings, usually the darker the image.What size rings do I need for a 50mm scope?
NOTE:
| Outside Objective Diameter | Ring Height for 1 Inch Tubes | Ring Height for 30mm Tubes |
| 49mm, 1.929 inches | .270 inches |
| 50mm, 1.968 inches | .270 inches | .300 inches |
| 51mm, 2.000 inches | .270 inches | .300 inches |
| 52mm, 2.047 inches | .270 inches | .300 inches |
What does scope magnification mean?
The primary job of a scope is to magnify the target, making it easier to see. So the magnification — how many times the image is magnified — is one of the numbers. If the scope is of fixed magnification or power, there is just one number. Four power means the image will appear four times larger than without the scope.How much magnification do I need?
In general, the least magnification that gives you a clear target image is the best magnification. I use 4x rifle scopes for most big-game hunting and think it adequate to 300 yards. A 6x works fine for me at 400. Of course, you'll want more magnification for small animals like prairie dogs.What does the 40mm mean on a scope?
In a 3-9X40 scope, the 3 means three power, or 3X. This means that the image you see through the scope appears three times (3X) closer than it does with your naked eye. The 9 means nine power, or nine times (9X) closer than it appears with your naked eye. The forty (40) is the objective lens diameter in millimeters.What is the purpose of an objective lens?
In a telescope, the purpose of the objective lens is to produce an image of a far away object, such as a star many light years away, close to the eye piece lens, closer than the focal length so it can be enlarged.What is a 4x32 scope What does it mean?
For example 4x32 is a 4power magnification, meaning items viewed through the scope are 4x their size. Or, the 4-16x56 is a variable power scope, with adjustable magnification from 4x to 16x. Low power riflescopes are ideal at close range and for shooting moving targets.What does parallax free mean?
For a sight to be parallax free that means that when the sight is on the target and you move your head around, the reticle does not move. This is pretty insignificant when the typical red dot sight uses are considered, so that is why reflex sights are usually described as "parallax free".What does 50mm mean on a rifle scope?
The second number in a scope, such as the "50" in a 3.5-10x50, is the diameter of the objective lens in millimeters. A larger number indicates a larger lens.Should scope rings have a gap?
There will be a slight gap on the sides of the rings; do not tighten until they touch as this will damage the scope. The gap should be about the same from side to side. By tightening a little at a time, and alternating side to side and front to back, this gap should stay even as you tighten.How many inch pounds Do I need to tighten a scope ring?
Ring screws should ordinarily be tightened to 15 INCH pounds with a torque driver. No more than 18 INCH pounds. Rings do not need to be "Farm handed." If you have large gaps on the sides of the rings, then the rings may need to lapped.What magnification do I need for 1000 yards?
Now my Opinion for the power needed for 1000 yards in a hunting situation is 10x would work fine. No more then that is needed. In fact a good 3-9x40 scope is all you need for 1000 yard big game hunting. As long as the optics are good and clear and crisp that's all you really need.Is Leupold a good scope?
With pristine optics, rugged durability and accuracy, Leupold rifle scopes deliver. By choosing Leupold, you'll get your money's worth and then some. With incomparable mechanical performance, crystal clear glass and rugged durability — all in a lightweight model, you're in good hands with a Leupold rifle scope.What does 1x magnification mean?
Magnification power is calculated by dividing the focal length of the scanning object (lens) by the focal length of the eyepiece. A 1x magnification power is a 100 percent increase in the magnified object's size For example, a 1-inch object at 1x would appear to be 2 inches.What magnification do I need to shoot 400 yards?
My rule of thumb is about 1-1.5X for each 100 yards is plenty. About 4X-6X would be more than enough. I wouldn't have a problem big game hunting with a 1.5X or 2X at 400 yards.How much torque should a scope mount have?
Wheeler recommends 15 to 20 in/lbs on standard scope ring screws on the upper halves. Supposedly after 20 in/lbs, the rings can handle it, but the bit has a possibility of breaking. The side bolts/screws have a large range of torque specs depending on what rings you have.What is a good high power rifle scope?
Right now, the most powerful conventional riflescope you can buy is the March X-Series 8-80x56mm scope. Featuring a 34mm main tube and 56mm objective lens, this offers a true 10-times zoom ratio and up to 80X magnification. 
