Given time it gets worse, too
- Price: $20 AUD
- Location: VIC
- Listed on: ssaagunsales.com
Seller Type: Private User Licence # 431-725-90B Location: ESSENDON NORTH, VIC, 3041 Phone #: *** click to reveal *** Description: Brian Finlay* makes a good point - but unfortunately it doesn’t end there. Variables with ‘second-focal-plane’ (non-magnifying) reticles have always posed the problem of bullet impact moving with magnification changes. However, the issue may not be apparent when a scope is new or being reviewed. Gradual wear in the fore/aft lens travel can move the target-image position over time, a problem enhanced because image-movement is the means of adjusting bullet impact in most scopes now. New research asserts that adverse movement of even five microns in lens positions, esp. in high-multiple variables, can bring target-focus and parallax issues that will exacerbate those bullet-impact problems. Constant rotational battering from recoil inertia might also bend the erector tube the lenses move in, changing lens alignment as they move back and forward between magnifications. Wear on the ball-joint or gimbal hingeing the erector tube will also bring parallax eventually and this will be hastened if non-galling (but heavy) brass is used for the power scroll assembly instead of aluminium. (There are answers to these problems but don’t expect them in magazines running large ads for new scopes - it would be commercial suicide for them to say their advertisers' state-of-the-art technology was not to be trusted. That said, one well-known reviewer has told me that no...
