Eyeskey Multifunctional Military Lensatic Tactical Compass | Impact Resistant and Waterproof |Metal Sighting Navigation Compasses for Hiking, Camping, Motoring, Boating, Boy Scout

Es una brújula robusta, algo pesada ya que es de metal, marca bien el norte, el único punto que no me gusto fue que la perilla para mover el limbo esta demasiado suave, no se siente un movimiento uniforme, en zonas se pone dura pero en otras como comente esta muy suelta, cualquier roce con esta pudiera moverlo y afectar el trayecto a seguir, tal vez tuve mala suerte y otras estén mejor. pero para orientarte siguiente un punto esta perfecta, lo que tendre que hacer es recordar los grados a seguir y cada que la vea asegurarme que sigue posicionado en los grados a seguir.

There are at least 20 of these compasses on sale here. They differ mainly in name and color, some have added clinometers. I suspect they are all made in the same factory in China. However, my past experience in similar circumstances suggests that the quality control on the purchase side makes all the difference. Therefore I decided to buy one that cost slightly more than the minimum price (currently around$10). I was not disappointed. The compass is solidly build from cast metal. All the parts line up as they should. The lines are placed correctly, the numbers are clearly visible. The sighting mechanism was what I was mainly interested in (I use the compass to position sundials). I was pleased to note that it worked really well: The compass card rotated quickly and damped down equally quickly. The sighting lines are easily visible with the compass right up to the eye. An accurate(?) sight was obtained rather quickly and easily. I compared this process with a similar one on three other compasses I own for the same purpose. This one was the simplest and quickest to use. The sight reading was within 2 degrees of two others (in the process I found that the fourth, the most expensive compass differed from the other three by almost 6 degrees but that is another story). I tried to verify the sights by using it with a map but was unable to do so: All three compasses were off consistently by several degrees to the west. I have not discover the cause of this and I am still working on it. Thus I am unable to confirm the absolute accuracy of this instrument at present.A few nit picks that stop me giving this item 5 stars:1) The bezel is calibrated in increments of 5 degrees while the sighting scale is calibrated to 1 degree. Even a 2 degree calibration would have been better.2) The bezel does not turn smoothly and tends to hang up. It is still usable, however.3) My main complaint is that the sighting scale has larger marks every 10 degrees only. It would have been helpful to mark the 5 degree stages also. What slows one down when taking a bearing is trying to determine if one is at 4, 5 or 6 degrees having to count the degree marks laboriously. I cannot comment on durability. The lines on glass seem to be printed, not etched, and one wonders at what stage they will begin to rub off.Overall, however, at just over $20 this is an excellent buy. It has become my go-to compass. A word of warning: Given its metal construction it is quite heavy and as such may not be the best choice for long distance hiking where every ounce of weight counts.Added 18/9/2016:I did some more testing. I took several bearings of local landmarks and after correcting for magnetic declination I compared them with the bearings generated by a computer from GPS data of each point. I was pleased that the worst difference was 2.5 degrees, others were much closer. Given the methodology I would consider this a satisfactory result.More to the point, I repeated the same sights using a new Iris 50 compass which is designed specifically for taking bearings. Most of the bearings were identical using the two compasses, a couple were 0.5 degrees apart and one 1 degree. Interestingly the Eyeskeye was almost as quick to get a bearing as the Iris 50 yet the latter has the advantage of eliminating parallax.If I could I would increase the rating to 4.5 star.A word of caution: If you are gong to use the tripod attachment make sure that nothing on the tripod, *especially the screw itself* are not made of iron. Ask me why :-)

My son loves it!

It's design is inferior to the standard USGI military compass, and many of the operations cannot be done in the same way. It does not open all the way flat to lay out on the map in the course direction as normal; it lacks a thumb loop for holding up to the cheek for sighting; it does not have the ability to measure degrees inclination to a distant object. However, it is sturdy and accurate, and able to perform regular map reading and orienteering functions.

I looked up this compass on Eyeskey Optics website and saw where they warned about counterfeit products that did not show the Eyeskey logo embossed on the cover. Mine did not have the Eyeskey logo! I don't know if Eyeskey and Eyeskey Optic are affiliated but I now have my doubts. It does not have the thumb hold but has the molded spot in the case where it would store when folded. The dial glows but takes a lot of light to charge it and it doesn't make the numbers legible at all, just a soft glow. It would be worthless at night if you have to count of it! Very heavy! Regret purchase!!!