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Optivisor with Lens Plate 2 X 10" by Donegan Optical Co., Inc.
Product SummaryManufacturer: Donegan Optical Co., Inc. Brand: Donegan Optical Co., Inc. Model: DA-4 Product features: - Lens provides 2x magnification at a focal length of 10 inches
- Optical Glass Prismatic Lenses are ground and polished to precision optical standards
- Adjustable pivots allow the visor to be tilted out of the way when not needed
- Bevel-edged lenses mounted in an interchangeable plastic frame
- Made In U.S.A.
Toys and Games Reviews of Optivisor with Lens Plate 2 X 10"Customer Review: Outstanding for close-up work. One small design flaw. Summary: 4 Stars
This is a great product. I use it all the time. I don't know what I did before I got it. I can do fine work with both hands free. It's perfect for any fine, close-up work. I've used it for electronics, removing slivers, and seam ripping. The grandkids love it for looking at bugs and leaves and other stuff they find in the backyard. We have great fun one day watching sugar and salt dissolve in water.
It is well made and well designed (one exception, see below). It fits perfectly and is easy to adjust. Once adjusted, it stays adjusted. There's a knob at the back of the headband that adjust the fit around the head. There are two knobs on the sides that adjust the tension of the lens frame to keep it in place, either directly in front of the eyes or up and out of the way. This works perfectly. It will stay put any place from all the way down to completely overhead. I have mine set fairly loose so it swings easily.
It's very light. Mine weighs just under 5 oz. It's very comfortable to wear. It has a removable leatherette head band in the front with a felt liner.
I don't wear mine where it will get dirty or sweaty, but it looks to be washable.
I like that it fits over my glasses. I can work with it up or down without having to remove my glasses. Nice design.
Each unit comes with one lens. Other interchangeable lenses are available. In this table, Pwr = magnification power and FL = focal length.
. No . . Power. . FL
. .2 . . 1.50 . . 20"
. .3 . . 1.75 . . 14"
. .4 . . 2.00 . . 10"
. .5 . . 2.50 . . .8"
. .7 . . 2.75 . . .6"
. 10 . . 3.50 . . .4"
These lenses are glass, not plastic. They appear to be good quality. I have the 3, 5, & 7. I use the 3 for most work.
This brings me to my only complaint - the way the lenses are attached. They do not snap in. The one that came with my unit had 2 little plastic bolts and 2 little plastic nuts. These are a pain to remove and I'm absolutely going to lose at least one of them at some point. They are jet black, so if you drop them, good luck finding them. I also bought 2 additional lenses. They each came with two little plastic "push bolts" that snap into place using the same holes as the bolts. These are even worse. They snap in easily enough, but require something hard to push them back out.
Also, there is nothing to prevent me from mounting the lenses backwards. It's not even all that obvious which is forward and which is backwards. It's way too easy to do it backwards.
The lenses should snap into place with no little parts that can be lost and no way to mount them backwards. I am deducting 1 star for this design flaw. I really hate to do that, because I love this gizmo, but a bad design is a bad design. also, these things have been out there for a long time. They could have fixed this problem.
Description of Optivisor with Lens Plate 2 X 10"OptiVISOR is a precision binocular headband magnifier which permits unrestricted efficiency while reducing eye strain, leaves both hands free, and allows three dimensional vision.
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