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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Vortex PST 6x24 FFP not clear at 24X
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<blockquote data-quote="bruce_ventura" data-source="post: 907570" data-attributes="member: 34084"><p>On the 6-24x50 PST FFPs that I've looked through, the image contrast gets noticeably worse at about 18X and above. It's like looking through a veil. Is that what you're seeing? </p><p></p><p>Veiling glare results from a lack of stray light management in the scope design. Eliminating it requires proper use of internal black coatings and surface ridges, apertures ("glare stops"), and lenses with blackened edges. It gets worse at high magnification, when the forward erector lens moves close to the FFP. In that position, the lens is able to collect more stray light. If you see it in this scope, I suspect that you will probably see it other scopes of the same model. </p><p></p><p>It could be that some folks notice veiling glare and others do not. You maybe more sensitive to image contrast than I am, or your lighting conditions may be worse, making the image contrast degrade at a lower magnification. Stray light rays are usually concentrated around the outer edge of the exit pupil. When the exit pupil is smaller than the eye pupil, which happens at high magnification, the eye collects more of these stray light rays. It could be that you have larger than average pupils. Eye pupil size depends on age and lighting conditions, for example.</p></blockquote><p></p>
[QUOTE="bruce_ventura, post: 907570, member: 34084"] On the 6-24x50 PST FFPs that I've looked through, the image contrast gets noticeably worse at about 18X and above. It's like looking through a veil. Is that what you're seeing? Veiling glare results from a lack of stray light management in the scope design. Eliminating it requires proper use of internal black coatings and surface ridges, apertures ("glare stops"), and lenses with blackened edges. It gets worse at high magnification, when the forward erector lens moves close to the FFP. In that position, the lens is able to collect more stray light. If you see it in this scope, I suspect that you will probably see it other scopes of the same model. It could be that some folks notice veiling glare and others do not. You maybe more sensitive to image contrast than I am, or your lighting conditions may be worse, making the image contrast degrade at a lower magnification. Stray light rays are usually concentrated around the outer edge of the exit pupil. When the exit pupil is smaller than the eye pupil, which happens at high magnification, the eye collects more of these stray light rays. It could be that you have larger than average pupils. Eye pupil size depends on age and lighting conditions, for example. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Vortex PST 6x24 FFP not clear at 24X
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