These give the strength in diopters and others in power. How do they convert?
505293
I don't think they do convert,the power is listed as magnification 1.50-2.50etc like all reading glasses, these aren't prescription completely different animal....
1312897
I don't know exactly, but I've had mine for a year. I use them occasionally for a lawn mower and they're very strong.
970211
I can't recall but they're sturdy enough to torque the planet into a faster orbit.
1340325
The first number is the power of the lens, that is how much it will magnify the image. The second number represents the diameter of the lens in mm. They work together to calculate a number called the "exit pupil" or "exit ratio". Take the lens size and divide it by the power to get this number. The higher the number, the brighter the image. For example, 10x50 will give an exit ratio of 5.0, 8x42 would be 5.25, 10x42 would be 4.2. In my opinion, the exit ratio is more important than the power. My favorite binoculars are 8x50 (6.25) but I also just bought 10x50 as a gift who is delighted with that configuration. Stay away from high-power binoculars. They, for me, are too hard to keep steady due to the high magnification. I hope this helps. -Norm
1480909
I don't know. They do strength, but when you strength them, they lose some softness because they thin out some.
2234743
I have no idea, but they appear very strong. I do not use them for exercise or bad weather, so not a good judge
1442237
Yes, I think the right-hand diopter adjustment is usual. I admit I don't use it often as the improved adjustable eyecups and big bright eyepieces allow me to keep my glasses on. I do like these binoculars. I especially value their ability to focus close-up, so they work as well for the backyard feeder as out in the field.
289771
They tilt to many angels and raise up and down. You can also change the distance from the bulb to the reflector some.
1743
The 1.25, 1.50, 2.0, etc refers to the strength of the glasses----the "prescription strength". The higher the number, the stronger the prescription. Someone who only needs reading glasses might only require a 1.50. Someone who can't see well without glasses would require a higher number. I would suggest you go some where like a Dollar General store and try on several different strengths of their over the counter glasses so you will know what works best for you. As for the "size" of the glasses....they kind of telescope in and out in such a way that you can adjust their size by about 4" total. Doesn't sound like much, but that's enough to accommodate most people's head size. Hope this helps! The 1.25, 1.50, 2.0, etc refers to the strength of the glasses----the "prescription strength". The higher the number, the stronger the prescription. Someone who only needs reading glasses might only require a 1.50. Someone who can't see well without glasses would require a higher number. I would suggest you go some where like a Dollar General store and try on several different strengths of their over the counter glasses so you will know what works best for you. As for the "size" of the glasses....they kind of telescope in and out in such a way that you can adjust... » Read More The 1.25, 1.50, 2.0, etc refers to the strength of the glasses----the "prescription strength". The higher the number, the stronger the prescription. Someone who only needs reading glasses might only require a 1.50. Someone who can't see well without glasses would require a higher number. I would suggest you go some where like a Dollar General store and try on several different strengths of their over the counter glasses so you will know what works best for you. As for the "size" of the glasses....they kind of telescope in and out in such a way that you can adjust their size by about 4" total. Doesn't sound like much, but that's enough to accommodate most people's head size. Hope this helps! « Show Less
12868
Push the adjustment lever up a bit to feed more baseline power to the bulb.
1749
The numbers 1.25, 1.5 etc refer to the maginification of the lens, the reading glass strength. The frames are all sized the same, for a unisex head shape. The temples are adjustable in length assuring a comfortable fit on a wide variety of head sizes. You'll need to know which power (+2.0? or +1.5? ect) you'll need for the lens of course. Thanks,
2211056
Magnification Power - It's your choice. Binoculars are identified by 2 numbers. The first is magnification power, the second is the diameter of the front lenses, explained below. Example: 7 x 35 binoculars have a magnification power of 7. A magnification power of 7 means that an object will appear 7 times closer than it would to your unassisted eye. For example, if you view a deer that stands 200 yards away from you through 7x binoculars, it will appear as though it were 28.6 yards away (200 divided by 7). So, the greater the magnification power the better the view, right? Not necessarily. Binoculars with magnification powers greater than 10 amplify the movements of your hands, making steady viewing difficult. Objective Lens Diameter The second number used in binocular identification refers to the diameter (in millimeters) of the objective lenses (those farther from your eyes; those closer to the "object" being viewed). Example: 7 x 35 binoculars have objective lenses measuring 35mm. The diameter of the objective lenses largely determines how much light your binoculars can gather. If you have 2 binoculars with exactly the same specifications except for objective lens diameter, those with the larger diameter objective lenses will capture more light. More light means a brighter view, particularly in low-light conditions.
176864
The glasses are easy to adjust by way of pulling in or out the sides that connect to the lenses. As I see it the glasses adjust o the circumference of your head not your face. I find them very useful. In church they help me read the program. when I let them hand on my neck I can see the minister/priest very well because I can see far away. I have recommended them to a lot of people. I have several colors to go with my outfits. or you can get a color that goes with everything. The other day I saw a lawyer in court using these glasses as he handled his case in front of a judge.
621877
3 1/4 inches with an inset of a stronger magnifier of about 1 inch diameter
194107
Yes, the entire room and the strength can be adjusted from lighter to stronger light.
381364
Good question. I bought them for my wife who is an avid bird watcher and is also a little rough with handling delicate things. The optics are great and they are easy to use. Most important they have held up very well after a few months of use and banging about.
1746
That is the strength of the reading glass. The higher the number the greater the magnification. It is not at all about the size as it will fit your head.