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EL Range TA 8X42 - Layman Review
Hi tenex, Like you, I don't think mustache distortion is superior to a small amount of pincushion that keeps both pincushion and AMD at acceptably low levels everywhere in the field, but complete correction of AMD over a large part of the field and corrected pincushion near the edge must be...- henry link
- Post #20
- Forum: Swarovski
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EL Range TA 8X42 - Layman Review
The Mustache distortion profile is not my way of "describing the things Swaro does to achieve a so-called flat field". The field IS flat or nearly so because off-axis astigmatism and field curvature are well corrected. The same corrections are accomplished with other distortion profiles in other...- henry link
- Post #17
- Forum: Swarovski
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EL Range TA 8X42 - Layman Review
I can see how Swarovski and Zeiss might think this is the best solution for distortion, since it combines the advantages of moderate pincushion over the inside 70% of the field combined with a decreasing pincushion and delay of the onset of AMD until the outer part of the field where they think...- henry link
- Post #15
- Forum: Swarovski
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EL Range TA 8X42 - Layman Review
If the little circle changes shape toward the field edge the binocular is not free of angular magnification distortion. It's as simple as that, no optical theory needed.- henry link
- Post #12
- Forum: Swarovski
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EL Range TA 8X42 - Layman Review
There is no connection. Correction of field curvature and off-axis astigmatism can be successfully combined with any sort of rectilinear distortion from barrel to pincushion and whatever amount of AMD inevitably results.- henry link
- Post #11
- Forum: Swarovski
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EL Range TA 8X42 - Layman Review
Hi John and dwever, I don't know why Swarovski continues to make claims of "distortion free" binoculars since they're just not true and are easily disproved by simple observations. No binocular can be distortion free since angular magnification distortion increases as pincushion distortion...- henry link
- Post #9
- Forum: Swarovski