Although depending on the exact terrain, a higher powered device might be more suitable in some situations.

As you know most birds are active at the very start or end of the day and what about for uses in forests or even jungles where natural light is blocked out by thick foliage. Image Quality You may find the answer to your question in the FAQs about the Fujinon Mariner 7x50 WP-XL below. This is certainly what we want to hear and is one of the key features of what to look for when buying binoculars. Using a tripod, or monopod onboard a boat in rough or even choppy waters would be pretty useless. Apart from a few hints and keywords dotted around here and there in their product descriptions, Fujinon does not go into any sort of detail when describing most of the optics and the coatings that they use on any of their binoculars, including these, but I will include what I have been able to find out as well as some other general information that I feel is of use: Combining a moderate 7x magnification with large 50mm objective lenses is a very common setup for marine binoculars, but is far less prevalent in any other niche. For skippers steering a vessel this can be an important consideration. Build Quality & Toughness It also means that because you are no longer focusing on it, the compass and reticle display becomes out of focus and thus not readable. But as I say, this is usually at the cheaper end of the market, because whilst I would still probably just give the edge to a high-quality twist-up cup, the ones these Fuji Polaris binoculars are extremely good: Comfort 0000001271 00000 n For the majority of binocular reviews I write, I use a benchmark instrument of the same configuration to compare the view through, which I find helps me to make more consistent opinions over time. endobj /Resources 3 0 R I also feel that even though these binoculars are military-spec tough, a more thickly padded case would have been preferable especially as the instrument is reasonably large and heavy.

/XIPLAYER8 16 0 R On the rear, there is a belt loop, but as the carry strap is permanently attached to the case and the fact that these binoculars are on the large and heavy side, I am not sure if I would ever consider attaching it to my belt to carry them. binoculars Overall, the image quality, brightness, and low light performance are some of the major highlights on this instrument and I certainly rank them up there with the very best. {@S82hY "I/A As good as the strap is, considering that this instrument is primarily aimed at marine uses, I think Fujinon is missing a trick here in not supplying these binoculars with a floating, high-vis neck strap that would make retrieving your expensive binoculars possible should you ever drop them overboard. '!]Ys%1TwMF1W85l&|}X/)q]k*e=0v |03-kh=c8CLgMgVNDcwf#-`| F=;bYfo&}#2zBg4'ex>T%X]b#PC)cQ,ajNl18S,O;FANecI#Z?8og`n,fFzZ3%aORb^1QkxXhl5e;+:=:[3P1[Ee|:%XK#hDv,s: 5YuN|oPy+h(OS:Gb2k -u0d;[X|!S_> Here again their toughness, durability, low light performance as well as the compass and range finding ability will all be of great use. For more, take a look at my article on how to focus and calibrate binoculars. As I mentioned in the body section above, this design of prism does not make for the most compact shaped binocular, but it does have a number of advantages over the more compact roof prism design. This includes a soft carry bag, padded neck strap, objective lens covers, rain-guard, cleaning cloth and an instruction booklet: The quality of materials, stitching and general function of the case is excellent. /XIPLAYER1 9 0 R Ae 'yhhw-*b"{:g24k+=N3nlS!X8cGB[5-xv'H~uopQ`uZmEuxUL-\Drl93Cr]LclCyq>S>it+'i2TP i,zgC(tJJXK1+,VJqGFjzhy).cc4g&-,2qh-7)I-4TzMaW}h-tcn`LN*SO4fL azc l(C_f%2ahcnbD(FO3i%g7v)(^M:q0n*GOoEd6B14?A'k;ds If for example, you compare this to an 8x42 and their 5.25mm exit pupil the difference is huge and even though a good 8x42 is no slouch in low light, it still really does make an observable difference in low and especially very light situations. /Parent 2 0 R it is also one of the main reasons why most marine-specific binoculars use the moderate 7x magnification as this also makes it easier to keep the image still. Trying it myself, the amount you can reduce the minimum focus distance by is substantial. V+DoM7`c2p9 /wQ/veXFrB3t>$KD,bNv=?$SFmvjk(W;RO.UF nKbi$MYm`d%v}NaWDxP%khg\i#p V]>"*Ets+m_t@S :9MaQ 0000001128 00000 n Optics using Fujinon's EBC Coatings, Firstly this makes them very easy to replace (I will assume Fuji sells these parts separately), Secondly, it makes cleaning the area around the eyepieces and especially the ocular lenses much easier, Then lastly, and if I'm not mistaken, the thread is such that it is designed to accept certain optional eyepiece filters, Once you have set them up, no further focus adjustments are required, making them easier to use and faster to swap between objects of interest, This is a much simpler system with fewer moving parts and thus once again makes the binocular potential more robust than those with a focus mechanism and all the potential issues that can result from it, You can more easily use this binocular with just one hand. However, as the 7x50 arrangement is not that common, I don't have a direct benchmark, so for this test, I compared them through my 8x42 benchmarks as I feel this is the one that most people will be able to relate to and is not too dissimilar to a 7x50. ; {FG.K ru?.qsv~K\*?>C8QOHw.2E]VouR7ywWP}JsA]Hgl .{T So whilst it is perfectly adequate for cleaning the body, I highly recommend purchasing an inexpensive lens cleaning kit for the proper cleaning of the lenses.

Minimum Focus Distance Advantages Even with the lower power, I was able to detect many more stars than a less "bright" binocular with a smaller exit pupil and at the same was able to take in whole constellations, rather than focussing on individual stars or planets as you would with a telescope or high powered binocular. This manual is available in English.

Whilst the strap is not padded, it is nice and wide, so makes carrying it with these fairly heavy binoculars reasonably comfortable. Warranty <<4C901889EBCD1D479759B0267101E747>]/Prev 1450423>> '. jZ::Fzf&+!7\aH'-qG\\FP]F^WA\\klT @BA?/R2r All Fuji Polaris binoculars are covered by Fujifilm's Limited Lifetime Warranty. endstream endobj 119 0 obj <> endobj 120 0 obj <> endobj 121 0 obj <> endobj 122 0 obj <>/Font<>/ProcSet[/PDF/Text/ImageC]/XObject<>>> endobj 123 0 obj <> endobj 124 0 obj <> endobj 125 0 obj <> endobj 126 0 obj <>stream This is not a common feature and is only sometimes found on expensive, high-end instruments. However, the major advantage here is harder rubbers are in my experience far less likely to perish or become tacky, which when you consider that these are expected to handle factors like salty sea spray and a lot of direct sunlight when left on deck, this is a reasonable and probably wise trade-off. So the advantage a well designed, high-quality twist-up cup would have over these is that you can be more precise and get more options to adjust the correct position your eyes sit behind the ocular lenses. Important to mention here is that, whilst very beefy, the "rubber jacket" fits very tightly and I think is glued to the chassis underneath. o Firstly a Porro prism is far simpler and does not require any special coatings added to them to correct the light going out of phase as it passes through them, nor do they require any highly reflective mirror coatings to increase the light transmission levels, both of which are needed on a Roof prism to get the best out of them. kgvd;(mg: 2h$~,A,A zsHyT/?pFw?|'~^cS=-_{K:==c/pIzDuSuZ-2\6X]-X62b>Xr"XZk9GA)os@k%t=7_T:nCXQc3n\3eW`A\}*qw8a?t!(GIF&Z=6P E={$s@|3e8/) f2lbg Hcpj9s9Fd8j&3'ZH .@A49UmH*{)5&N?2J;dZm ^=G9.> h_|5Y#b1` Marine Binoculars startxref Although if I had to be pressed into making a decision, I would go for these, but as I say, the difference was so small, that it is hard to know if it is not imagined because you are expecting it to be so. Whilst the lower-end, lower quality Bushnell 7x50 Marine Binocular with Compass is substantially less wide at 6.7 or 352.41ft' @ 1000yds (117m @1000m). Dimensions This primarily the down to the shape of the Porro prisms contained within the barrels and whilst this may not be as modern looking as the straight-through designs used by Roof prism binoculars, this shape and indeed the prisms over the user several advantages: I will get to the Porro vs Roof prism advantages in the optics section later on in the review, but in terms of the shape, and like many larger Porro prism binoculars, I found the Fujinon FMTRC-SX 7x50 binoculars extremely comfortable to hold and to use as the wider set barrels are at a distance apart that is just more natural to hold onto. /ColorSpace /DeviceGray So for clarity, I just wanted to point out that the pair I was testing is their most recent version or as some call it the Fujinon 7x50 FMTRC-SX-2 Binoculars with Compass! This manual is available in the following languages: English. It is a bit hard to describe and even harder to photograph (I tried! The Fujinon FMTRC-SX 7x50 binocular is one of the finest boating, sailing, yachting or shipping binocular that you can buy. /Subtype /Image This has many advantages in many different scenarios, be that scanning distant horizons looking for a point of interest, to being able to quickly lock on and then follow a moving object, which can be important for general wildlife observation, security, surveillance and of course birding. Like the case, the strap is branded and the materials used along with the stitching is excellent and of very high quality. However, to be fair at close range, these should not be of much use anyway. This user manual comes under the category Binoculars and has been rated by 1 people with an average of a 7.5. Access to the interior is via a large fold-over lid that is held closed with a strip of Velcro. ^(#BteWV~_W{Zv(0^ @v L[ They show almost no image softening, minimal color fringing and the color reproduction and contrast is excellent. Floating Neck Strap? What I do like is, like the chassis, they feel extremely strong, and I am certain it would take a really large force to knock the barrels out of alignment. As I mentioned in the section above, these do not require any special coatings on the prisms, and so as with most Porro prism binocular reviews that I write, this section is often pretty short: Anti-Reflection Coatings So quick to access, but not as secure as something like a Zip would have been. %PDF-1.4 /XIPLAYER2 10 0 R /Contents 5 0 R uN binoculars m22 Optical Stats Rating (compared to 7x50 Bins): 8/10. 0000003005 00000 n All of which adds up to make sure that even with what is a fairly heavy binocular, you can comfortably carry them. Here again their toughness, excellent low light performance, wide view and not needing to focus makes the Fujinon FMTRC-SX an excellent choice for many search and rescue operations as well as security and border patrols. Rating for Body Construction Quality: 8/10. However doing this also vastly reduces the depth of view, but it can be useful if you sometimes need to focus on something fairly nearby.

/Width 1652 >> Color Fringing Distortions Our database contains more than 1 million PDF manuals from more than 10,000 brands. Shape Also worth pointing out is that I never noticed any sort of artificial tinting of the image, which is sometimes also the case where you can get a greenish, yellowish hue to the image. Weight I immediately noticed that these FMT's are very comfortable: Firstly the soft rubber used is far kinder when pressed firmly and for longer periods against your face, and then because of their large diameter and long eye-relief, it just makes for a comfortable and relaxing experience for your eyes. Made from metal, the double bridge hinge design on these Fujinon Polaris binoculars is a fairly typical design on a full-sized Porro prism binocular like these, so not much to expand on here. Looser hinges result in you often having to readjust your setting and feel cheap, whilst ones that are too tight make adjusting them a pain. For a larger heavier instrument like these, this is a reasonably important feature and worth noting. So whilst these with their moderate 7x power are perfectly hand-holdable, they are not the most lightweight of instruments, so for long periods of looking at the stars and for sharing a view, it is nice to have the choice of fitting them to a tripod or monopod. Tough Although you could still use the cover, it would just mean that it is not tethered. /XIPLAYER6 14 0 R Reviewed by Jason Whitehead for Best Binocular Reviews. zeiss jena fernglas 7x50 schilling augenmuschel iq However, because these particular Fujinon Polaris FMTRC-SX binoculars also have a heads up display showing the compass heading and reticle, the diopter on the left eyepiece is also used to focus the eyepiece sharply onto it as well. Able to perform in some of the toughest environments, the military-specification Fujinon Polaris 7x50 FMTRC-SX binoculars are often described by experts and professionals within the boating, yachting and fishing industries to be one of the very best marine binoculars in the world. Low Light Performer /XIPLAYER7 15 0 R _UwBNUSN:#"+"A/P0yU. 0000002013 00000 n TKk Whilst not a weakness as such, rather an oversight or perhaps even a suggestion, but I feel that for a high-end marine binocular, it would have been nicer and probably far more useful if they were supplied with a floating, high-vis neck strap that would firstly make it possible and then easier to retrieve them should they go overboard. However, having said that, they do include information on how to use the compass and the mil reticle, including the formulas on how to measure distance, object size and calculating object directions. Firstly the 7x power used on most binoculars is down to the fact that it is much easier to keep the image steady and shake-free with a lower magnification, which on the unsteady platform of a boat or yacht on the water is of great importance. One aspect that I instantly noticed on taking these Fujinon Polaris binoculars out of the case is just how large the ocular lenses looked. Fujinon does not stipulate their exact minimum focus distance as this will depend quite a lot on your particular eyesight, but it usually varies from about 15 to 30meters. Rather unfairly, they all get tarred with the same brush and I will admit to often stating in my reviews of binoculars using folding cups that I would have preferred to have had the twist-up type instead. sK2YA4[ kWoyjP?5_~;d7ZTIOv#hr/:>_fE"Asb:wcbbh& 0000002392 00000 n XAA 5:Jt H}!mC/ m=HhDAWN'- q:i(Oa}7 e BAShxnF<>1@T`Jo Size & Weight !aq6o6m6LPq8ci@!fCV*. On the down-side, should the rubber connector ever break, it will make them very difficult to replace. The reticle will be appreciated by many hunters and whilst the compass may be of passing interest to many, for some outdoors users, this could be of use. In addition to this, I was never aware of any sort of image curvature or other unwanted distortions. Not, unlike some these do not use batteries and so the compass will not be visible at night unless you shine a light onto the top of the body. Unlike most binoculars that allow you to completely remove and put away the objective lens covers, the ones on the Fujinon Polaris 7x50 FMTRC-SX binoculars are permanently tethered to the body and indeed are simply part of the overall rubber armor exterior.

/DecodeParms [null 8 0 R] Fine praise indeed, but considering their 7x50 configuration and taking a close look at their main specifications as well as their features, I wondered if these Fujinon binoculars could be even more versatile and perhaps in the right situations and conditions (especially low light) also make an excellent binocular for astronomy, hunting and even some types of birding. Larger ocular lenses offer the user a number of immediate as well as potential benefits, which I go through in detail in this post on ocular lens size in binoculars, so I won't repeat them all here. Image Flatness & Softening

Is your question not listed? Field of View Fully Multi-Coated But through some digging online, their overall weight and by the look and feel of them, I am fairly sure the Fujinon 7x50 FMTRC-SX binoculars have an all-metal chassis. However, whilst they are easy to replace, the design of the very soft and thus flexible fold-down eye-cups means that they cannot fit quite as tightly as some and thus they do come away just a little to easily for my liking.

:@KGF\N2, TGI4/MAH.`a\w S E9=E By folding down the eye-cups, the long eye-relief also makes them an excellent choice for those who wear some sort of eye wear when using their binoculars, be that sunglasses on the boat, or your reading glasses. Essentially Field-flattener lenses are designed to rectify field aberrations and reduce distortion and thus help to deliver sharper, clearer images right to the edges of the view. 0000001227 00000 n J*jZj$ddd[P\Sf`M"yCRAE^/ ($)%} Apart from that, there is much else to do, you simply look through and use these Fuji Polaris binoculars as normal and you are given the heading of the direction in which you are looking.

Either way, this is not really what this type of binocular is designed for and so I would not recommend them to anyone who often observes objects at close range. The amount I observed through the Fuji 7x50 FMTRC-SX binocular was extremely minimal and far less than the vast majority out there. /XObject << /XIPLAYER0 7 0 R As I briefly mentioned earlier, these and indeed all Fujinon FMT binoculars sport a traditional-looking body shape with the eyepieces closer together than the large objective lenses at the end. Image Conclusions Diopter Adjustment /BitsPerComponent 8 0000070096 00000 n A point to mention here is that the cups can be unscrewed and removed from the eyepieces. 62]K: V4FhBO>%FxytU2KU1d4+]#FOH5TMJ`Ip Able to deliver a bright image in very low light conditions, I can think of many times whilst working as a safari-guide, either leaving before sunrise or returning after sunset, I would have loved to have had a very low light binocular like this at hand. ), but for those who have never used one, the image on the right is a really good representation of what you see when looking through these binoculars.

3 0 obj URL: http://www.fujifilm.com/products/binoculars/. In normal/average light conditions during the day (I tested these in winter on both overcast and on clear sky days), the image brightness between these and both my mid and high-end 8x42's was not markedly different. I also like it the pretty much 'perfect' level of resistance that the hinge opens and closes with and on top of this, there was zero free play or stiff sections on my sample pair. Weather Proofing Copyright 2022 Manual.nz. These large shafts of light exiting the ocular lenses ensure that your eyes are receiving more than enough light, even in very low light when your pupils are fully dilated and thus will look to have a brighter image than a binocular of equal quality, but smaller exit pupil. Also, because the barrels are further apart, and somewhat like a "stereo" sound system, you get a better stereoscopic image the further apart the speakers, or in this case the lenses are. The exact amount depends on your eyesight, but I was able to get it down to around 6 meters. Q 2D>4wp|<>%5-=E%5u ;>w{GFNLN}_ ..-<9 ;Qx 59 *O?alabg9:?LaK;E 2hW^aMU2G3hj+Dhwox`G>_rDb\I{1t!a5NZa'd7tz\wM/,F)Xv`BY}S ;MyPQTR!_vcm f/1s4Lg%Q[qxaq7mAJV3IIMb!; >> This is to be expected as in these reasonably good light conditions and as long as the quality of the optics is good, both the 8x42 and 7x50 configurations supply your eyes with more than enough light for you to perceive a bright image. << /Length 46691 But what is a little frustrating is that they do not indicate as to the level or what recognized standard that they are tested against. 0000003641 00000 n Indeed the only time I have been made aware of anything better is on the Steiner Nighthunter 8x56 binoculars that have a +96% Light Transmission. mtrc poseidon 7x50 fujinon sx compass binoculars Instructions So whilst perfect for medium to long distances like when out on the open water (marine use), or for astronomy and some types of wildlife/hunting and birding uses, these binoculars and indeed all others with this type of focus system are no good for close-range observation. As you would expect, also included is a small instruction booklet. There is no doubt, if you are looking for a high performance, super tough marine binocular that will handle everything (and more) that you throw at them, then these Fujinon Polaris 7x50 FMTRC-SX binoculars should be right at the top of your shopping list. Astronomy The rubber Fuji has used is quite hard and so this does mean you get less grip and less impact absorption than a softer more spongy rubber. Whilst many will assume that you have to have a very high magnification for an effective astronomy binocular, this is not always the case. Below are similar pairs of Binoculars that you may also want to have a look at: Designed to withstand the elements, a bright image, wide field of view & a rangefinding reticle, digital GPS & compass - ideal bin for boaters, securi, General Price Range: (5/6) High Value Binoculars. U0+?fj/b2r2bY-6 But this lower power brings with it a few other advantages: it helps ensure a wide field of view and creates a larger exit pupil when compared to the same size of binocular with a higher magnification: 7x50 binoculars produce a massive 7.14mm exit pupil (507). Another point I have to mention about folding cups is that I have found the crease where you fold them down can perish and crack on instruments where you either leave them folded down or fold them up and down often, which I imagine could be exasperated by salty water and/or exposure to harsh sunlight? " !L\QY, ,^! xref I do sometimes find that thicker rubber armors can move or slide about on top of the chassis, but there is pretty much zero chance of that occurring with these. Disadvantages NS 47~*5/Nx> =_$S(f@=SrX{u& WTY?R={4[8Fit]VrEuMBGSx|-_{/=.8+TrIFW$qs,U5lQ/M6.mc@A+i fw[o7CRG$;T`e$J[FPBFe~a Y. It's very simple: just type the brand name and the type of product in the search bar and you can instantly view the manual of your choice online for free. Color Reproduction & Contrast Do you have a question about the Fujinon Mariner 7x50 WP-XL? Manual.nz ensures that you will find the manual you are looking for in no time. 4 0 obj !]e|C6V~H%` x x9#*`u!Wc]"+{\;@n }sW-+m=qgC#h uhq:] Another important point to mention is that I noticed that the 50mm objective lenses are set very far back into the ends of the barrels. /XIPLAYER3 11 0 R Less obvious but extremely important to know is that all models incorporate field flattener lenses into their optical pathway. What I can say is that the interior s filled with Nitrogen gas, which since it is completely moistureless, prevents condensation forming on the internal glass surfaces. 0000001548 00000 n Once again the Fujinon Polaris 7x50 FMTRC-SX binoculars did not disappoint and the level of observable color fringing, even under extreme tests like looking at a black telephone wire against a bright blue, sunlit sky showed very little amounts and nothing more than any other very high-end pair of optics would show. Speed & Ease of Use

What they do mention is that their FMT series uses their EBC coatings (Electron Beam Coating) that they say have a 95% light transmission level which benefits image quality, brightness and especially for low-light performance. What this means is once you have correctly/normally calibrated the diopter on each eyepiece to complement your vision, these Fujinon Polaris 7x50 binoculars will remain in focus from their minimum focal distance, all the way to infinity. With these folding cups, you can make adjustments by pushing the soft cups more or less firmly against your face until you are presented with the full view. As well as the image brightness, the general image quality is superb. 118 16 /XIPLAYER5 13 0 R

But once again this seemingly small detail is really important for their intended use and shows excellent attention to detail. The combination of their excellent low light capabilities and very wide field of view makes for the ideal instrument for scanning the night sky. But in a nutshell, these coatings ensure that as little light as possible gets reflected in unwanted directions and away from each of the lenses and so increases the amount of light gets transmitted right through the instrument and onto your eyes. Not all of the models within the FMT series are rubber coated but as this FMTRC-SX version is primarily aimed at marine and other potentially bad weather uses (as opposed to astronomy, where the weather conditions need to be good), these are, and what a coating they have! This is something that I only occasionally find on higher-end instruments but is an excellent feature because: As there is no centrally located focus wheel, it is tempting to describe binoculars like this as having a fixed focus, but the fact that you can adjust the diopter setting on each of the eyepieces separately and thus effectively adjust and fine-tune the overall focus, I feel that it is more correct to call these and the many instruments like them Individual Eyepiece Focus Binoculars. /Rotate 270 Before we get into the main part of the review, I thought I would go over the built-in compass and rangefinding reticle that you will see when looking through the Fujinon 7x50 FMTRC-SX binoculars. Used to make the view more steady whilst onboard and helping to deliver the very large exit pupil important for low light performance, another advantage of the moderate 7x power is that it helps produce a very wide field of view. Indeed you need your body to act as a shock absorber to counter some of the movement. However, in poor light and especially in very poor light, you really can notice the improvement between these and even high-end 8x42 binoculars. hSMo0W(5#[vuH!=iVK6i?JNh|$'_g;,(4?PYNC0ZL . Whilst not quite class leading, compared to other 7x50's this Fujinon compares extremely well, for example, the Celestron 7x50 Cavalry is exactly the same at 394ft @ 1000 yds, whilst perhaps their more direct competitor, the Steiner 7x50 C Navigator Pro Binocular is a little less wide at 7.1 or 373ft @ 1000 yds. The compass heading display is illuminated vial the little opaque bubble on the top of the body and so if you cover this, it goes dark. Indeed I believe this is the part that most often gets damaged on an instrument using twist-up cups and so is another nod to the robustness and durability of these 7x50 Fujinon FMTRC-SX binoculars. Below you will find the product specifications and the manual specifications of the Fujinon Mariner 7x50 WP-XL.

Other than that small point, they work as intended without issue. H xJ[CdweJDjwp Wkx8L i_9){ZmYP &q&CUM1 g~ w]Cc6^Xl3l \ p0!Y#h";JZVbR_i[eNxdL24 Whilst it would be nice had they been lighter, just keep in mind that many lightweight binoculars have a plastic chassis and other parts where Fujinon has used metal and don't forget the additional weight created by having the onboard compass. @dQaSqdA@Fqg`:iF(Sq@Ey3 Note: If you do need or want to focus on a nearby object, having the two diopters does make this possible by adjusting them both by the same amount. Do You Want to Review Binoculars & Write for BBR? Something that Fujinon does highlight in their product descriptions and with very good reason is the fact that they incorporate Field Flattener Lenses into the optical pathway of all their Polaris FMT binoculars. Once gain, the Fujinon branded rainguard is not generic and obviously designed to work with their FMT series of binoculars. %PDF-1.4 % Hinges & Inter-Pupillary Distance (IPD) Adjustment Removable If this is something that is of concern, I would suggest taking a look at some of the floating binocular straps that are available. Exclusively Marine Binoculars?

Ask your question here. [P?zLO[D~;Dx1w4y>wg] \wrOWb+$eJT| RpPN?1DzGHt{wnwtA'JhG!,[VW$c,~(~&_#Q ]I8?&SuJ{%D&*Bn~~j3{{/'(+E1? With such a large amount of eye-relief, I found that this worked perfectly fine and was able to achieve the full image when I tested them using my sunglasses (commonly used when sailing/boating), but you don't get the micro-adjustments that are possible with good twisting cups.



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