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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Need Help Picking A Spotting Scope!
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<blockquote data-quote="Sako7STW" data-source="post: 486082" data-attributes="member: 2112"><p>RDM416, This might be what you were reading about as it more pertains to color??I will try and make it easy to understand....I hope</p><p></p><p>APO or Apochromatic lenses are designed to bring three wavelengths (typically red, green, and blue) into focus in the same plane or point. This allows the best full color spectrum viewing through out the full view of the lens with minimal edge distortion of color (by this edge, I am refering to the edge of the view in the scope). Although very rare APO can be achieved without the use of a Low Dispersion lenses (ED, FL, UD, SUD, ECT) most of the time they do use a low dispersion type of lens. However it is not tens material that makes it "APO" This is mostly achieved by the lens coatings and the curvature of the lens. Lens material does play a major factor as lens materials that have a lower quality distort the image and thus distort color rays by bending the color rays. Low dispersion means less distortion simply put. This is mostly apparent where an objects edge that is...lighter in color for example is next to a dark background and the edge appears to "blend' into the background instead of having a sharp, crisp edge. With a good APO optic, there should be crisp edges and crisp colors without blending. Not all manufacturers will advertise a APO setup as APO as very few people now what APO even is. My guess is just about any of the higher end "HD, ED, FL, ect" type optics will also have very good APO characteristics to them even if it isnt directly named as such.</p></blockquote><p></p>
[QUOTE="Sako7STW, post: 486082, member: 2112"] RDM416, This might be what you were reading about as it more pertains to color??I will try and make it easy to understand....I hope APO or Apochromatic lenses are designed to bring three wavelengths (typically red, green, and blue) into focus in the same plane or point. This allows the best full color spectrum viewing through out the full view of the lens with minimal edge distortion of color (by this edge, I am refering to the edge of the view in the scope). Although very rare APO can be achieved without the use of a Low Dispersion lenses (ED, FL, UD, SUD, ECT) most of the time they do use a low dispersion type of lens. However it is not tens material that makes it "APO" This is mostly achieved by the lens coatings and the curvature of the lens. Lens material does play a major factor as lens materials that have a lower quality distort the image and thus distort color rays by bending the color rays. Low dispersion means less distortion simply put. This is mostly apparent where an objects edge that is...lighter in color for example is next to a dark background and the edge appears to "blend' into the background instead of having a sharp, crisp edge. With a good APO optic, there should be crisp edges and crisp colors without blending. Not all manufacturers will advertise a APO setup as APO as very few people now what APO even is. My guess is just about any of the higher end "HD, ED, FL, ect" type optics will also have very good APO characteristics to them even if it isnt directly named as such. [/QUOTE]
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Need Help Picking A Spotting Scope!
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