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  • OptiVisor Optical Glass Binocular Magnifier 1.75x

Donegan Optical

OptiVisor Optical Glass Binocular Magnifier 1.75x

Donegan Optical

OptiVisor Optical Glass Binocular Magnifier 1.75x

£120.00 £72.00 Save: (40.0%)
£72.00 £120 Save £48 (40.0%)
Delivery Time: 12-18 days

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Delivery Time: 12-18 days

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Product Description Product Description
  • Power: 1.75x
  • Focal length: 14"
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Customer Reviews

PerfectExactly what I needed to get up close on my detail work with my oil commissioned paintings! 5Headband Too SmallThe leather supporting the padding on my old OptiVision visor finally failed after 25 years of use. So I needed a replacement.This visor s headband is too small by a long shot. After adjusting it to the largest size I asked everyone in the shop to try it. No one could put it on. It was too small for everyone. I suppose someone at Donegan Optical Company decided they could save a few cents on plastic.My solution was to rob the padding from the new one and put it on my old one. I had to get creative and soldered a couple of rivets to get the job done, but it looks like it will work.To Donegan Optical Company, don t sacrifice the quality of your product just to save a few pennies. You will lose dollars in lost sales. 1Prescription Glasses, DA vs. XL/AL models, Lens Plates, OptiLoupe, Quasar LED Light, and Diopters vs. Magnification ...Donegan vs. MagnifyLabs vs. Bausch & Lomb:The main decent quality choices seemed to be: Donegan Optivisor DA ($36 - glass lens - this review) or LX ($26 - acrylic lens), MagnifyLabs Headband Magnifier ($26 - glass lens) and less-known knock-offs, and Bausch & Lomb Magna Visor ($36 - acrylic lens). The Bausch & Lomb had too many bad reviews. The MagnifyLabs apparently has glass lenses like the Donegan DA and is cheaper and well-reviewed. But for only $10 more I preferred to go with the proven original - the Donegan DA. The headband has a huge adjustment range to accommodate a-n-y head size and is remarkably comfortable due to the padded forehead. The plastic adjusting size and flip-up tension knobs are hokey but they work.DA vs. LX / ALRegardless of misinformation by others, the Optivisor "DA" models have the two-piece glass-lens-in-blue-tinted-plastic-frame lens plates, while the cheaper Optivisor LX (= AL lens) models have the single-piece-all-clear-molded-in-acrylic-lens-plate. No idea why Donegan chose to confuse things by using Optivisor "LX" for the headband but "AL" for the lenses. My box said "DA-5" and I scratch-tested the lens - it's glass.Prescription Glasses:You can wear your glasses with this - plenty of room - or no, as the lens acts like near-sight glasses anyway. I prefer to wear my normal prescription glasses with these since they correct both my eyes for crystal clear starting vision, with two interesting side effects: 1) the overall magnification is noticeably greater due to the magnification added by my glasses (great!); and 2) the focused working distance is reduced - for me for the 2.5x lens from the nominal 8" to 5-6". So if you wear glasses, consider this in your lens power choice, as your glasses will add more magnification themselves, plus reduce your working distance further than the nominal number claimed.Lens choice:For me, the 2.5x magnification lens (5 diopter) is perfect for general usage inspecting things like splinters, coins, golf club grooves, electronics, bugs, super-glueing very small stuff, etc., because it shows everything of possible interest while still allowing a comfortable 6-8" distance from the work and a reasonably broad and deep field of view. This is as opposed to, say, the highest 3x magnification (10 diopter) which makes you work excruciatingly close at 4" (or 3" with glasses) and also with a narrower field and depth of view. With a 3x lens at 4" you can't even get your fingers in there to do anything - only for specific professional use. So I think most would find opting for a comfortable working distance more important than trading that off for any extra magnification. A modern car key is about 4" long so try it - put a newspaper down and bend down until your glasses meet the car key and try to do anything in front of the lens. Plus you can just add a $10 OptiLoupe (see below) to a medium magnification lens for the rare times you want to scrunch down to 2" to check out something further at 4-5x.OptiLoupe LP-1 ($10):I added the separate 2.5x OptiLoupe for the occasional super-close-up. The loupe mounts on either side you prefer - just pull the original lens mounting screw or pin out on that side and shove the OptiLoupe on with its longer screw in its place. The loupe lens was maybe glass at one time but it definitely is acrylic now (I scratch-tested it), but that seems irrelevant given the perfect clarity. You have to close the other eye when using the loupe, but that works fine. (You can't use one for each eye because your eyes won't focus properly through both together.) Assuming you'll rarely need/use a super-close-up, this is a much better solution than having to switch a separate high power lens plate in and out of the headband. With my glasses on and this flipped down, the working distance is reduced to 2" but the clarity is great.Quasar LS (Lighting System) model 6010 ($25) - not DoneganYou can see things with normal room lighting, but for serious views, actual detailed work, or long use, the more magnification, the more light required. The Quasar is very convenient - very bright lighting comes with you and I haven't felt the need to add external light. To add it on, you pull the two original lens mounting plate screws out, slap the Quasar LED frame on the front of the lens plate, and stick both back on with the longer plastic pins supplied. Then you just place the battery pack on the side of the headband and strap it on with the supplied velcro strap. Simple on-off switch on the side of the battery pack. Unnoticeable when mounted. Takes 2 AA batteries that come with it (nice surprise - Energizer alkalines!). Batteries claim 100+ hours of life, which given LEDs, seems likely. Fyi, works with the MagnifyLabs headband also. Donegan offers the VisorLIGHT, a single non-LED bulb alternative but it seems pretty lame in comparison given 5 hour battery life, $10 replacement Xenon bulbs, and review quality issues.Additional/Replacement Lens Plates:This is extremely confusing because of the supplier misinformation as of June 2016. So I talked with the manufacturer Donegan. They confirmed they do offer both glass and acrylic additional/replacement lens plates through their dealers (although, oddly, you can't find these on their manufacturer website). They confirmed their glass lenses are two-piece, with the lenses glued into a blue-tinted surrounding acrylic frame and designated LP-2/3/4/5 with "LP" standing for Lens Plate. Their acrylic lenses are a single-piece of clear acrylic, with the lenses molded directly into and as p[art of the overall acrylic frame and designated AL-2/3/4/5 with "AL" standing for Acrylic Lens. So glass lenses have a blue-tinted frame and acrylic lenses have a clear frame. Confusingly, all the "LP" lens plates currently listed on Amazon indicate in their details that they are acrylic, not glass, which conflicts with the "LP" designation. Counter-confusingly, the pictures show blue-tinted frames which would indicate glass lenses. So either they are glass and the "acrylic" in the detail description is wrong, or they are acrylic and the LP and picture are wrong. So check what you get accordingly - maybe they'll correct this corrected after our talk.Optical Power (Diopter) vs. Magnification Power:I did a little research to figure out what the Optical Power ("Diopter") vs. Magnification Power thing is all about. Turns out Optical Power ("Diopter") is the fundamental measurement optical professionals use because it integrates naturally with the compound optical equations typically required in their profession. Technically, the Optical Power (Diopter) of a lens equals the reciprocal of its Focal Length measured in meters. So, for example, a lens with a 20 centimeter focal length (1/5th of a meter) has a Diopter of 1 / [1/5] = 5, and a lens with a 10 cm focal length (1/10th of a meter) has a Diopter of 1 / [1/10] = 10. "Magnification Power" = the increased size of the image viewed, not the Focal Length, so it is not a one-to-one linear relationship, but is generally related to Diopter as follows: Magnification = [Diopter / 4] + 1. So, for example, a 5 Diopter lens has a Magnification Power of: [5/4] + 1 = 2.25x while a 10 Diopter lens = [10/4] + 1 = 3.5x magnification. Usefully, you can add Optical Powers (Diopters) to understand the Magnification result, but not Magnification Powers. So adding a 5 Diopter OptiLoupe (2.5x) to my 5 Diopter headband (2.5x) = 10 Diopters => which converting = [10/4] + 1 = 3.5x overall magnification ... similar to the maximum 10 diopter 3.5x lens plate option. 5The real thing - excellent optics.I use these for watchmaking and soldering of small SMA components. I love them. The optics are great. The first time I purchase one, I was stupid and purchased the highest magnification. #5 (this one) is much better for most applications. The optics are real ground glass and they hold up to cleaning.The head piece is slightly uncomfortable. A redesign here would be advised. I end up with a red patch on my forehead when I wear these for too long. I'm sure that there is a way to modify these to make them more comfortable, but I haven't gotten around to it yet.Overall, these are a good value and a great tool. Donegan has been doing this for 50 years I'd guess. There are cheap chinese knockoffs, but in my world these are worth a few extra bucks for a quality, genuine product. 5Optivisor LX has plastic lens and the "regular" OptiVisor has glass lensI own many OptiVisors and LOVE them, and so does my wife. But be careful -- there are two different products under the OptiVisor name. The original OptiVisor is more expensive and has interchangeable glass lenses. The lower-priced LX model has plastic lenses. Reading through all the reviews, it appears that negative reviews are for the LX product and all the glowingly positive reviews are for the original OptiVisor product. Both are available on Amazon. My recommendation is to purchase the regular OptiVisor with the #4 lens. This is 2X magnification at a focal length of 10 inches, which is pretty much exactly what is needed for working on musical instruments, electronics, needlepoint, and most other typical uses. If you already know that you need to get your nose 4" from your work, or you already know that you need to peer at something from 14" away, then buy one of the other lenses, but if you just want great magnification for detailed work (especially with aging eyes) then the #4 lens is the one you want -- but not the LX, the regular OptiVisor DA-4. 5Not the usual Donegan quality . I was shocked. TWICE ! Finally satisfied with newest replacement.I have several of the Donegan OptiVISOR s in various magnifications so I know what to expect in regards to quality. I never had a problem, until now. I bought the DA-7 magnification for very close-up work and when it arrived I was shocked to find the glass lenses literally falling out of the plastic frame.So, no problem, I ll simply snap the lenses into place and write this off as a poor assembly job by the manufacturer. After numerous attempts to get the lenses to snap into place I gave up as I was afraid of breaking the plastic frame. It appears the glass lenses are just not contoured properly and I presume the factory assembler reached the same conclusion.As is my usual approach, I first tried to contact the manufacturer via their customer service e-mail. I try to do this before writing a product review whenever possible. I got no response so here is my review. I will now take this through the very good Amazon product return/exchange channels. I had hoped to avoid that and simply get a new lens assembly from the manufacturer. Now they ll have to replace the whole visor. I do prefer the glass lenses compared to the molded optical plastic. They are more scratch resistant IMO.UPDATE: Okay, Amazon shipped another right away before the first one was returned. I couldn't believe my eyes. The replacement has lenses that also are not positioned well. This can't be right! How can a product with uneven lens positioning be appropriate for precision binocular vision? If I'm wrong I wish the Donegan folks would educate me but they don't respond.UPDATE: After writing a letter to the Donegan president I did finally get a response. They shipped me a new lens plate and asked that I return the questionable one, which I did. The newest plate is much better with the two glass lenses aligned well. So, I m improving my review to 4 stars because I believe the quality of Donegan products is usually good. 4Amazon shipped inferior produce in the manufacturer's original box. Not the manufacturer's fault.I ordered the OptiVisor DA-3 (NOT the OptiVisor AL). The Amazon product description states the lenses are made of ophthalmic quality GLASS. It also states the box contains the OptiVISOR, a fitted, plastic carrying case and an instruction manual.The product arrived in an unsealed manufacturer's box labeled OptiVisor Optical GLASS Binocular Magnifier DA 3. Inside were a visor with PLASTIC lenses in an open, flimsy clear plastic wrapper and an Owner's Manual.No GLASS lenses. No carrying case. If I wanted cheap plastic lenses I would have ordered a less expensive product.Amazon sold an inferior product in a more expensive product's box, missing some of the items. Amazon gave me a refund. But how do I get the product I want? 1Could not be happier! USA Made and Wonderfully Useful!Don't know why I put off ordering these for so long. I have a dentist (sorry, "oral surgeon") friend who has several pair laying around his house and when I tried them i fell in love(with the visor, not him)! He recommended Donegan brand as it is actually USA-made. He (and I) like the fact if one uses a headlight it will work with this, shining over the visor. His headlight cost $6k and is fiber optic; mine cost $20 and dims and focuses better than his!I got the 2.75 sort of by mistake, but it allows me to focus in 'stereo" at about the right distance. Would recommend less power for looking into someone's bloody mouth or soldering, though ;) It's great for gunsmithing, extracting slivers, ticks, etc.. I forget I have it on sometimes because it feels exactly like wearing a baseball cap. This makes it easy to look over or under the lenses without actually moving the assembly, which is nice.If I get a lower power (for less close-up automotive repairs, etc) I'll just get the whole visor/lens combo because it'd be much handier to have two. 5Top shelf to say the leastI got advice from several friends before I bought this. Their advice was spot on.I am very happy with them and they perform just as claimed. The optical glass is easy to clean and doesn't scratch. They are comfortable, the headband is well made, and the weight is not an issue. The headband ratchet works well but once I adjusted it for my head, I don't mess with it.I wish I'd bought one of these years ago. A real timesaver and augments my machining hobby. I bought the loupe to go with them and use it often. I wish the other lenses were a bit more economical and I would likely buy a different magnification. They are ground optical glass and therefore the cost is as you might expect. 5Ideal for comfortable, hands-free magnification while working on small detail (Be sure to make note of the focal length!)When I was first looking to order these, I was at a loss as to which magnification strength I should choose. I was leaning toward a higher dioptric strength (like 2.75X or 3.5X), but I was concerned about the listed "focal length" which was very short.I eventually ordered a 2X magnification strength because the 10" focal length is most appropriate for the detailed sculpting work I do (although I'm finding them wonderful for other projects, too).The focal length is very important. If you're using these for regular work, you probably already have an idea of how far from your eyes your project generally is -- your work distance comfort level -- and you should factor that distance into your decision on which magnification level you choose. In my instance, I can't always lift the piece I'm sculpting closer to my face (if it's heavy or mounted on a turntable), nor do I want to shove my face down uncomfortably close to my work. I took the time to determine and measure exactly how close I normally prefer to be when sculpting. That distance, for me, turned out to be 10-12+ inches away. I didn't want to choose a magnification less than 2X, though, so I chose it since the focal length was 10."As an example of how important the focal length is, I wanted to point out that if I shorten or lengthen my distance from my project by more than an inch or so from the prescribed 10", the vision distorts.For additional magnification, they offer an attachable 2.5X loupe magnifier. I decided against that, though, and ordered a second OptiVISOR in the 3.5X for those rare times that I need extra magnification.I'm glad these don't come with an integrated light, because then they'd be much heavier to wear because of the required battery pack. You can add a simple LED light attachment made specifically for them (click here -- Quasar Led Lighting System for Optivisors) if you find it necessary.The OptiVISOR is fairly comfortable to wear. There's a turning button on the very back of the band that adjusts the sizing to fit. The magnification lenses will easily push up (and stay up) out of the way when you don't need them. 4
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