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To summarize, the Swarovski has an advantage in that its field of view is much wider. This of course gives you a bigger picture. How important that advantage is really dependent upon on your needs. However in every other category, the Alpen either matches the Swarovski or betters it. Both have the same type focus system, same exit pupil, full multi coating, same prism material, phase correction coatings for their prisms, and both are waterproof and rubber armored. However, the Alpens are also lighter, can focus closer in, and have superior eye relief.
A quick note. You may have noticed that the Swarovski has an aluminum body and assumed it to be the superior material. Actually, it’s not. The Alpen’s body is made from a proprietary composite polycarbonate which is stronger by far than the aluminum, and has much better heat stability. Also as you may have noticed, the polycarbonate is much lighter. Lastly, producing binoculars from this particular material is actually more expensive than making them from brass, aluminum or even magnesium.
The Swarovski’s are tripod adaptable. On the other hand, while the Alpens do have the means to be tripod adaptable, it takes a some extra effort. Let me explain. There is a built in threaded receptacle on the front of the Alpen’s center focus spindle to accept a tripod adaptor. However, the spacing between the two barrels is too narrow for most standard adaptors to fit into this small area. However, if you or a friend is at all handy with tools, making an adapter is perhaps a 15-20 minute job. My good friend Bill Racer threw one together for me with a strip of scrap metal, two washers, and a screw. I think the total cost was 65 cents.
When I look through the Alpens, I see a bright, vivid, slightly exaggerated three dimensional image in which the colors are true and clear. There’s no yellow, green, gray or blue tinting. Nor is there any distortion, waviness, bending, or blurring even at the extreme edges of the image. The picture you see is completely lifelike.
So what is it that makes these Alpen’s so good? Well, first you’re starting off with big, high quality 50mm objective lenses. These are three element apochromatic types. Most objectives for almost all sport optical products consist of a two element achromatic lens to correct chromatic aberrations for two colors. These do a pretty good job, however the three element apochromatic lens types can focus the incoming light to the same wavelength in three colors (usually red, blue, and green or yellow). Only the very best optics use APO lenses. For a more complete discussion of the subject see my article "The Best 60mm Spotting Scope on the Planet".
We’re also dealing with a optical system that is fully multi coated. Why is full multi-coating a good thing? Well when light hits those big objectives, and all the other lenses in the system, it’s natural tendency is to be reflected away. All that reflecting and light scattering does all kinds of bad things to our image. The coatings are multiple layers of rare earths that reduce the reflecting and scattering, which then results in more light being transmitted through the system while increasing contrast.
Another big part of the winning formula for these binoculars is the fact that they use BAK4 glass for its roof prisms. So why is that good? BAK4 is a type of barium crown glass that has a couple of significant advantages. One, there is less chromatic dispersion. Translation - colors are more true and distinctive with no fringing which gives you a more vivid image.
Two, BAK4 glass will give you images that are unvignetted. So what’s vignetting? Well it has to do with something called the cos-4th law of optics. In a nutshell, this means that with most lenses, the edges will receive less light than the center. The result is the fact the the farther you get from the center, the darker the image will become. Use of BAK4 glass helps to overcome that situation resulting in a brighter image across the whole lens. BAK4 glass also produces a perfectly round exit pupil (the shaft of light containing the image exiting the rear of the optical system) instead of a "lumpy" shaped exit pupil.
Additionally, the Alpen’s prisms are phased coated. This is very important. This feature separates excellent binoculars from binoculars that are merely "good". By their very nature, roof prisms will split the light that hits them into two paths. Of course this is occurring in each of the binoc’s two barrels. Those two light beams are then forcefully refocused back together by the time they exit the eyepieces. However, there’s a problem. Both of the refocused beams will be slightly out of phase (sometimes called phase shifted) with each other even though they’ve been mashed back together. So here you’ve got a situation where out of phase light is coming out of each of the two barrels of the binoculars. (Sounds kind of Star Treky doesn’t it?)
Phase coating on the roof prisms, will refocus the beams back into phase. The result is superior resolution and contrast and a very edgy image. If you want binoculars that will be able to see a 6.5 mm bullet just passing under a steel ram’s belly, or can pick out an eight point buck bedded down in the tall dry grass, you definitely want phase coating to see that level of fine detail.
Lastly, there’s waterproofing and rubber armor. If there’s any chance at all you’ll be taking your optics into the field, you need waterproofing and armor. You wouldn’t buy a rifle scope that wasn’t waterproofed would you? Things happen in the field. It gets wet out there. It snows out there. Things get dropped out there.
So does that Alpen water proofing really work. You bet. I recently heard of a case where a fellow took his Alpen binocs on a hunt and accidentally left them hanging on a bush by their neck strap. Those binocs were left out there in the wild exposed to snow, rain, and all the elements for a full year. When the owner went back to the site on another hunt, he found them right where he had left them the year before. The rubber eye cups had rotted away but the binoculars themselves were in perfect optical and mechanical condition . I know that most of the time it’s probably over kill, but I just feel better knowing I won’t ever have to worry about my binoculars fogging up or letting me down at a critical moment. Reliability is important to me.
In summary, you can pay nearly $1400 for a pair of super premium binocs, or you can pay well under $400 for a pair of Alpen Apex binoculars that gives virtually the same level of super premium performance. Your choice, your money.
Good luck and good shooting.
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