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The 17mm of eye-relief is good and whilst not quite enough (18mm) to make it onto my list of binoculars with long eye-relief, it should still be more than enough for almost all users who wear glasses to get the full view. This is because many will boast that they are Fully Coated or Multi-Coated, however this only means that either all lens surfaces have been single coated or only some of the lens surfaces have been multi coated. However a particular highlight for me is the carry case that is most certainly a step above almost all others at this range: There are a few benefits to this, including making it easier to align your eyes to the lenses and potentially you can get a higher image resolution. As a point of interest, I measured the closest distance that I could focus on my sample Carson RD 8x42 binocular to be 190cm / 6.2f which is much closer, although at that range you do get some convergence/cross over between the the left and right sides of the view, which is one of the reasons why many manufacturers quote a distance that is more than what is actually possible.
Excellent Focus Wheel - Looks great, silky smooth operation, well positioned, nice and large and plenty of grip Indeed the only parts showing on these are the two hinges and small sections of the eyepieces that are exposed when you twist up the eye-cups.
The Carson XM Series Binoculars also feature a rubberized armor coating and the body is nitrogen purged and O-ring sealed making them waterproof and fogproof. Most models have plenty of eye relief with twist down eyecups making them ideal for eyeglass wearers. Under the rubber the Carson RD 8x42 binoculars have a Polycarbonate plastic frame that forms the body shape and protects the optics and mechanisms within. This looks good and most certainly has less chance of perishing than those that use much softer rubbers. At 9.8ft, the minimum close focus distance for an 8x42 binocular is good, but not excellent (6ft or under). This is perfectly normal at this price level as the are cheap to manufacture, lightweight and reasonably strong.
Whereas Fully Multi-Coated tells us that every lens element throughout the system has been multi layer treated which does make a big difference in both quality and brightness. The 3D Series of binoculars contains Carson's flagship range of binoculars with 5 different models,. All 3D Series binoculars are of a roof prism design featuring high quality components and optics including fully multi-coated optical elements and Phase corrected BaK-4 prisms that give a sharp and high-contrast image over the full field of view.
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The models within the series include a compact 8x26 (RD-826), a mid sized 10x34 (RD-034), a 10x and 8x42 (RD-042 and RD-842) and then a large 10x50 (RD-050). So as you see the Carson RD-Series is fairly comprehensive and thus will cater for a wide range of uses and interests. Carson RD 8x42 Binoculars Review Suceess was mainly down to their focus on innovation, which helped Carson compete effectively with much larger industry competitors and this overall philosophy is still what drives Carson today. No information is given by Carson Optics as to the arrangement of the lenses within the eye-piece, so other than to say that I measured diameter to be 23mm diameter, which I have to highlight as being fairly large for a 42mm binocular: Remember, this is not only good for those people who not afraid of the rain, as being hermetically sealed means that they are also protected from dust in dry conditions as well. However unless you are really planning on exposing yourself and your optics to the extremes, this should not be much of an issue for you. I just added it as many people ask what the difference is between cheap and more expensive binoculars and this is one of them!
The case comes with it's own detachable shoulder strap and it also has a very comfortable hand strap that I really like. This cookie, set by YouTube, registers a unique ID to store data on what videos from YouTube the user has seen. They both feature a roof prism design using quality BaK-4 glass and come with optics that have been fully multi-coated. Their coatings, quality glass help to take and transmit as much of the gathered light as possible to your eyes, which can rally help and is indeed most noticable when lighting conditions are not great or even poor. For more on this and to compare the ocular lens size on these Carson RD Series 8x42 binoculars with others: Ocular Lens Size in Binoculars. Objective Lenses However on the negative side, the surface is more reflective (so offers less camouflage), provides less impact protection and less grip as well.
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The twist-up eye-cups on this instrument are about as comfortable as most others out there, so not too much to expand on here. Carson don't state the 'official' IPD range on these, but I measured it to be from a minimum of 5.8cm up to 7.7cm which is fairly typical for a 42mm roof prism binocular. distortions in the view that can occur like bending or curving of the image. Once focused on an object, image sharpness remained consistent from the center of the view right up to the edges. At this price range, the focus wheel on these is truly up there with the very best and is in my experience is as good as that which you find on many, if not most mid to high end instruments.
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