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Rifles, Reloading, Optics, Equipment
Long Range Scopes and Other Optics
Learning to deal with uncommon eye issues and choosing optics.
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<blockquote data-quote="FTRshooter" data-source="post: 1837722" data-attributes="member: 112707"><p>The coating thing is not a bad issue. I'm sure we're all aware that lenses require multiple coatings to deal with the various wavelengths that compose visible light coming through the riflescope. Coatings are used to minimize if not eliminate the amount of light reflected back by the air-glass boundary. Uncoated glass reflects back about 5% of the incoming light for each air-glass boundary. You can see how that would quickly eat up the light after several lenses.</p><p></p><p>Now, I know virtually nothing about how coating is performed; I've read stuff and seen some videos so I understand the concept but I have 0 details, so I'm safe in saying I know virtually nothing about it. That said, it is my understanding that coating is something that is "proprietary" to whomever performs the task and that it can be adjusted, tweaked or whatever depending on what one is trying to achieve. I'm sure there are trade-offs and limitations and so on.</p><p></p><p>It's also important to understand that people's vision varies quite a bit. We have been talking so far about lens shape and acuity, let me bring up another aspect, color perception. We also call this "color blindness" or some other funny names such as "dad, what color do you see here?"</p><p></p><p>There are essentially two major types of color deficiency, which give us protans and deutans. I'm one of the former ones. This is also known as red-green color blindness, but it has a lot of other fun issues. The deutans are also red-green color blind but they have different side issues. There are three types of rods that detect a specific color in the retina; red, green and blue rods. Protans don't detect red well enough and deutans don't detect green well enough. They make up about 10% of the population. There are also tritans, who have blue rod deficiencies but those are much rarer at 1%. Then of course, there are those who don't see ANY color, everything is a shade of gray.</p><p></p><p>There are many places on the internet where you can do a quick test of your color vision and see if you're normal or what ails you.</p><p></p><p>That said, there is a lot more than coatings to discuss. When you say, this or that scope is fine and that one and the other are terrible, you have to be much more specific and explain what you are experiencing and what the difference is between one and the other.</p><p></p><p>One aspect that I found quite important for me was the use of ED glass in the riflescope. This has the effect of reducing chromatic aberration, the color bleeding that you see as you move away from dead center on the lens. When I went from NF NXS to my March-X, I noticed that the colors were popping a lot more. The rings on the target face were no longer furry, they were much crisper. The contrast was excellent. I am thinking that as a protan, the better separation of the colors worked in my favor a little bit.</p><p></p><p>When I further upgraded from my March-X with ED glass to my March-X with High Master Super-ED glass, I found that contrast increased a little more and the colors were popping more. It's difficult to explain to someone who's never seen it, but when I point out what to expect looking through the scope and comparing to another, people see it.</p><p></p><p>That said, if one brand works well for you or another one simply doesn't cut it for you; you do what's good for you.</p><p></p><p>Also, when people talk about German glass Vs other glass, take that with a huge brick of salt. Glass provenance is a big shell game and it's more than just the glass, it's also the coating, the grinding and so and so on. You would be surprised to see where some of the stuff originates from. Don't rely on any of that, do try out as many as you can before buying. And for gosh sakes, do it under proper conditions.</p></blockquote><p></p>
[QUOTE="FTRshooter, post: 1837722, member: 112707"] The coating thing is not a bad issue. I'm sure we're all aware that lenses require multiple coatings to deal with the various wavelengths that compose visible light coming through the riflescope. Coatings are used to minimize if not eliminate the amount of light reflected back by the air-glass boundary. Uncoated glass reflects back about 5% of the incoming light for each air-glass boundary. You can see how that would quickly eat up the light after several lenses. Now, I know virtually nothing about how coating is performed; I've read stuff and seen some videos so I understand the concept but I have 0 details, so I'm safe in saying I know virtually nothing about it. That said, it is my understanding that coating is something that is "proprietary" to whomever performs the task and that it can be adjusted, tweaked or whatever depending on what one is trying to achieve. I'm sure there are trade-offs and limitations and so on. It's also important to understand that people's vision varies quite a bit. We have been talking so far about lens shape and acuity, let me bring up another aspect, color perception. We also call this "color blindness" or some other funny names such as "dad, what color do you see here?" There are essentially two major types of color deficiency, which give us protans and deutans. I'm one of the former ones. This is also known as red-green color blindness, but it has a lot of other fun issues. The deutans are also red-green color blind but they have different side issues. There are three types of rods that detect a specific color in the retina; red, green and blue rods. Protans don't detect red well enough and deutans don't detect green well enough. They make up about 10% of the population. There are also tritans, who have blue rod deficiencies but those are much rarer at 1%. Then of course, there are those who don't see ANY color, everything is a shade of gray. There are many places on the internet where you can do a quick test of your color vision and see if you're normal or what ails you. That said, there is a lot more than coatings to discuss. When you say, this or that scope is fine and that one and the other are terrible, you have to be much more specific and explain what you are experiencing and what the difference is between one and the other. One aspect that I found quite important for me was the use of ED glass in the riflescope. This has the effect of reducing chromatic aberration, the color bleeding that you see as you move away from dead center on the lens. When I went from NF NXS to my March-X, I noticed that the colors were popping a lot more. The rings on the target face were no longer furry, they were much crisper. The contrast was excellent. I am thinking that as a protan, the better separation of the colors worked in my favor a little bit. When I further upgraded from my March-X with ED glass to my March-X with High Master Super-ED glass, I found that contrast increased a little more and the colors were popping more. It's difficult to explain to someone who's never seen it, but when I point out what to expect looking through the scope and comparing to another, people see it. That said, if one brand works well for you or another one simply doesn't cut it for you; you do what's good for you. Also, when people talk about German glass Vs other glass, take that with a huge brick of salt. Glass provenance is a big shell game and it's more than just the glass, it's also the coating, the grinding and so and so on. You would be surprised to see where some of the stuff originates from. Don't rely on any of that, do try out as many as you can before buying. And for gosh sakes, do it under proper conditions. [/QUOTE]
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