How Stuff Works: Polarized Sunglasses

I once heard a highly regarded fly fisherman say that he considered polarized sunglasses to be his most important piece of gear. These sort of statements always amuse me because I can’t help to wonder how important those sunglasses would be if he didn’t have a rod or a line or a fly! But I definitely get what he meant. While polarized sunglasses may not be THE most important piece of gear, they are often the most underestimated by many fishermen.

Polarized Sunglasses

Many fishermen, particularly those new to the sport, probably underestimate them because they don’t understand the difference in sunglasses and polarized sunglasses. They see sunglasses as merely a means of protecting your eyes from bright light and may opt not to wear them at all on overcast days or when fishing in shadier locations like the mountains. While polarized sunglasses do protect your eyes and reduce eyestrain in bright conditions, they have far greater importance when it comes to tactical applications.

Light usually scatters in all directions, but when it’s reflected from flat surfaces, it typically becomes polarized, travelling in a more uniform (usually horizontal) direction. This creates a serious intensity of reflected light that causes glare and reduces visibility. The more reflective that flat surface is, the more intense the glare will be – consider how a signaling mirror works.

Looking Through Polarized Lens

Water has highly reflective properties and basically acts like a mirror that intensifies those reflected rays even more. I’m sure everyone can think of instances when driving where significant glare was encountered. More than likely, the worst glare you ever encountered when driving was during or right after a rain. Pavement is a flat surface that can reflect light and cause glare. Wet pavement intensifies that reflection and creates more intense glare. With that in mind, it stands to reason that you will get even more intense glare when light reflects off the surface of lakes, rivers, streams, etc.

So, “regular” sunglasses will help in these situations by essentially darkening this reflected light, making it less stressful to your eye, but the glare will still be there and will prohibit you from seeing anything on, or in the case of water, under that surface. But the chemical filter on the lenses of polarized sunglasses is designed to absorb horizontal light waves, while still allowing vertical waves to pass through. Because light only travels in one direction through polarized lenses, glare is eliminated, or at least reduced.

Contrary to what I believe many anglers expect, this technology does not create “magic fish-seeing glasses!” Fish will not suddenly be visible when you put on your polarized glasses, but with better ability to see through the water, you will be much better equipped to spot fish. However, the most consistent benefits you will receive from polarized glasses are the ability to better see your dry fly on the surface, and the ability to read water by better recognizing slower seams and deeper troughs and pockets. Additionally, being able to better see the stream bottom will allow for easier, safer wading.

Just how well your polarized glasses eliminate glare often depends on the angle the light hits and reflects off the water. There will be times on bright sunny days when the light reflects at such a severe angle that even the polarized lenses don’t seem to help. During these times, your best bet is to change the angle the light is hitting your eye by repositioning. For example, you may be on the left side of the stream facing and fishing toward the right and encounter an insurmountable amount of glare. Often by fishing from the other side of the stream and facing/fishing the other direction, you can totally eliminate the glare.

Even on overcast days or in shady areas, you can encounter significant glare, so I almost always wear polarized glasses when fishing. This is where lens color becomes important. Darker lens colors, like gray, will block more light, making them more ideal for bright conditions. They also work well on deep blue water and better maintain true color. But they block a little too much light in low light conditions like overcast, heavy shade, or dawn and dusk, which offsets the benefits of polarization.

Lighter lens colors, like yellow or rose, allow more light in and are perfect for fishing in low light conditions. They often even make things appear brighter. But in bright conditions, you want something that will filter light, not magnify it, so these are not good choices for sunny conditions on open water.

If you plan to fish a lot and expect to fish in a variety of different light conditions, you may find it beneficial to have multiple pairs of polarized glasses in different lens colors. But if you’re looking for one, multi-purpose lens color, an amber, copper or brown color sort of fits right in the middle. And these lens colors work particularly well in shallow water where most fly fishermen operate.

Fitover Glasses

The shape of the frames can also be a factor in how well the glasses work. Frames that “wrap” more will help prevent direct and/or reflected light from entering on the sides. “Straight” frames, like an aviator style, allow more light in from side and rear angles. While prescription polarized sunglasses are available they can be problematic in a wrap style frame. Essentially, you’re dealing with a bent lens on a wrap style frame. The stronger the prescription and the more severe the bend in the lens, the more distortion you’ll get when looking side to side. Straight frames are better suited for prescription sunglasses.

If you wear corrective lenses and prefer the benefits of a wrap style frame or if you simply don’t want to fork over the money for prescription sunglasses, there are a number “fitover” sunglasses that are designed to be worn right over your regular eyeglasses.

How Stuff Works: Landing Nets

Variety of Landing Nets

Landing nets are designed to enable anglers to land a fish more easily and safely. They are most beneficial when dealing with larger fish that have a tendency to make one last dart or head shake when you try to grab them, often resulting in the tippet breaking. While in the Smokies, I rarely carry a net because the fish are typically not very large and can be landed by hand with very little trouble, and a net is just one more thing to carry. But I use a net regularly when fishing tailwaters and delayed harvest streams.

Long Handle Carbon Net

Traditionally, nets have been made with a wood frame and cotton netting and that style is still common today. However, wooden frames are more and more frequently being replaced by lighter, carbon frames and rubber is replacing cotton for the netting. The rubber netting has a number of advantages over cotton – the most notable being that it is better on the fish. Cotton netting has a tendency to get caught and tangled in the fins, gills and teeth of the fish and with trout, absorbs and removes some of their protective “slime.” Fly hooks also catch and easily tangle in cotton netting. Rubber netting eliminates all of these problems and holds far less odor than cotton.

Other things to consider when looking for a net are the size and shape. Obviously, if you’re expecting to catch bigger fish you’re going to want a bigger net. A 20-pound striper just won’t fit in a 16 ½” trout net. Landing nets are typically sized by the overall length, including handle, as well as the size of the head (the part that holds the netting). The size of the head should be chosen based on the size of fish you’re pursuing while the overall length (or the handle size) should be chosen based on how you will be pursuing them. For instance, if fishing from a boat, a longer handle may be desirable since it’s more difficult to get the fish close to you. If wading, a long handled net might be too cumbersome to carry all day.

Magnetic Net Holder

If you plan to carry a net with you when wading, there are a number of options that will help keep the net out of the way, yet easy to access when needed. Most every fishing vest or jacket has a D-Ring on the back. The sole purpose of that ring is to clip your net on it. To make it even easier, there are magnetic connectors that include a section of plastic, “pig tail” type cord that allow you to utilize the net while it remains tethered to you. There are also oversized retractors that accomplish the same thing.

Net Holster

Folks who choose to use sling packs or hip packs tend to have trouble finding a suitable location for attaching their net. Attaching it to the pack with a traditional retractor or magnetic connector often leaves it hanging too low or in a location that impedes the casting stroke. I know many who have remedied this by using a type of net “holster” placed on a belt. The net is stored handle down and drawn from the holster when needed.

Like most things in fly fishing, there doesn’t seem to be a “one size fits all” solution to the type of net you use or the method you use to carry it. It’s a matter of finding something that best fits most of your needs and carrying it in the least obtrusive way possible.

How Stuff Works: Fly Lines

For those with more of a spin fishing or bait fishing background, you may be used to casting a weighted lure or live bait with sinkers. You have a reel of monofilament line and when you cast, you propel the weighted lure forward and it carries all of the monofilament line with it.

In fly fishing, we’re using virtually weightless flies, many designed to float on the surface of the water. Even weighted flies that are designed to sink don’t have enough weight to carry themselves any sort of distance. We use the fly line for that. In essence, the fly line replaces the weight of a lure. When spin fishing, a weighted lure carries a weightless line when cast. In fly fishing, a weighted line carries a weightless lure.

Most fly lines will have a core of come sort and a plastic coating. Saltwater lines usually have a more rigid monofilament core, while freshwater lines usually have a softer, suppler Dacron core. When the plastic coating is applied, it is usually done in such a way to achieve a particular taper. The taper is how and where the weight is placed on the line and how it is designed to behave.

A weight forward taper is the most common. If the fly line is 90’ long, which is typical, the first 50’ or so that attaches to the backing and the reel will be thinner and level. Approximately the front 40’ of line will be thicker except for the last few feet where it attaches to the leader. The intention is for the weight to be in the front part of your line to maximize casting efficiency at your most common distances. For longer casts, the thicker, weighted portion “pulls” the thinner, un-weighted portion behind it with a technique called shooting line.

There are variations on this weight forward design for specialty situations. For instance, a bass line may have a shorter but more dramatic taper, where more weight is placed in a smaller area. The purpose of this is to aide in turning over the heavier, more wind resistant flies commonly used in bass fishing. Some of these variations are referred to as ‘shooting heads.”

Fly Line Tapers

A double taper line is becoming less and less popular but is one I still really like for fishing smaller streams like in the Smokies. It has a more gradual taper and it tapers equally from the middle of the line out to each end. This design allows for more delicate, accurate presentations at distances of 40’ and closer, and it roll casts extremely well. It’s also nice because you when you wear out one end of the line, you can turn it around and use the other. It is a disadvantage for distance casting because when you get beyond 40’, you get into the “reverse taper.”

You may also run across level lines, especially at discount type stores. There is no taper to level lines. They can be attractive to the beginner because they are so inexpensive but they cast horribly. Unless you are getting into some specialty techniques, I would avoid level lines altogether.

Most fly lines float. Even when fishing weighted flies in streams, a floating line is most often used because the fly and leader can usually sink enough to get the fly where it needs to be. However, there are sink tip lines available in different weights, where the front part of the fly line will sink to get a fly down deeper and faster. These are more commonly used for streamer fishing in lakes or deep, swift rivers. Full sinking lines are also available but not used very frequently. They allow the entire line to sink but are extremely difficult to cast.

Common Fly Line Weights

Fly lines are sized by a line weight that is designated by a single number like a 4-weight or 9-weight. This is intended to match the same designation on a fly rod, so you would use a 5-weight line on a 5-weight rod. It takes the amount of weight in a 5-weight line to properly flex or “load” a 5-weight rod and make it cast its best. If you used a 2-weight line on a 5-weight rod, there wouldn’t be enough weight to load it and you’d throw your arm out trying to get the line out. If you used an 8-weight line on a 5-weight rod, it would overload it, resulting in a hard, clunky cast that was hard to control. There may be some specialized situations where you may want to over-line or under-line a rod, but 99% of the time, you want to match the line weight to the rod.

You choose what line weight (and rod weight) you need based on what you’re fishing for. For trout, you’re typically casting smaller flies to fish in clear water and trying to achieve delicate presentations. Lighter lines in the 3 to 5-weight range are common. For largemouth bass, you’re probably fishing more stained water and commonly casting bigger, more wind resistant flies. You’ll be able to better accomplish this with 7 to 9-weight lines/rods.  In saltwater, you probably want heavier lines not only for heavier flies, but also to contend with heavier winds.