Quote:
Originally Posted by fpjeepy05
Has anyone ever had a problem busting scopes with a whisper? I know rimfires require a special scope because of the vibrations could it be possible i need the same for my whisper?
If anyone knows a lot about scopes can you explain me this? Field of View is based on two things? Eye relief and Magnification? So since these scope have the same magnification (at the low end) so shouldn't the scope with teh closer eye relief have the greater field of view, but with these scopes it does not hold true cause the Weaver has a closer eye relief and the Simmons has the greater field of view.  |
It's peak acceleration which breaks scope. The duration of the acceleration is not very important. Firearms which produce the highest peak acceleration are those which have the largets bullet weight to rifle weight ratio with the fastest burning powders. In that respect a 300 Whipser produces higher >peak< rifle acceleration and a 223 Rem or 17 Rem but not as much as an AR-15 shooting 45 ACP or 50 Beowulf. That has little to do with felt recoil. Longer duration causes more felt recoil, but less peak recoil so scope damage isn't directly comparable to felt recoil.
The most likely cause of scope damage on any rifle is from dropping it. Dropping a rifle six inches with the scope landing on a rock produces far high peak acceleration than firing a 50 Beowulf. Scope damage from dropping the scope usually isn't noticed until subsequent shots are fired and it's discovered the scope has lost it's ability to hold zero. That gets incorrectly blamed on recoil from those last few shots.
Field of view does not directly depend on magnification or eye relief. It depends directly on the focal length of the objective lenses and the diameter of the field stop which is usually (but not necessarily) the physical clear diameter of reticle assembly. There are two "fields of few" One is the actual field of view which is the apparent angle that the view of the target covers to the target and the area around it, and the apparent field of view which is the angle the field appears to be as seen by the eye though the eyepeice. Those are related by the magnification, (apparent filed of view = (actual filed of view * magnification) expressed as an angle, usually degrees.
To acheve a wider actual AND apparent field of view for a given magnification and eye relief the field stop (usually the aperture of the reticle) must be made larger diameter , and it's necessary to also have larger diameter lenses in the eyepiece which usually means a larger diameter eyepiece end bell. Expense goes up rapidly with larger eyepieces which require more complex designs, and the weight goes up rapidly too. It's rare to find riflescopes with eyepiece lenses much over an inch diameter though some exist.
There are many low power pistol scopes with eyepiece assemblies much larger then the objective lens. That is to achieve an acceptable apparent filed of view and very long eye relief. At low power a larger objective lens does not give a
brighter image and actually makes parallax error (for a non AO scope) worse.
Is a scope with a wider field of view "better". Maybe if you need a wider field of view, but it will probably be heavier, larger and cost more or have shorter eye relief. Scope designers offer many choices and buyers get to choose.
Linear Mode
