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Magnifier standards

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  • randall2845
    I purchased a hand held magnifier which was advertised as 8X but the manification was less than the 5X I had been using. I purchased it from a company in
    Message 1 of 11 , Oct 25, 2008
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      I purchased a hand held magnifier which was advertised as 8X but the
      manification was less than the 5X I had been using. I purchased it from
      a company in Canada. Is the standards different in Canada or did I get
      ripped off?
    • Jennifer Jesso
      I would contact them and find out if you got shipped the wrong magnifier. That s happened to me before. The standards are the same worldwide. Jen ... From:
      Message 2 of 11 , Oct 25, 2008
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        I would contact them and find out if you got shipped the wrong magnifier.
        That's happened to me before. The standards are the same worldwide.

        Jen

        -----Original Message-----
        From: magnifiers@yahoogroups.com [mailto:magnifiers@yahoogroups.com] On
        Behalf Of randall2845
        Sent: Saturday, October 25, 2008 11:34 AM
        To: magnifiers@yahoogroups.com
        Subject: [magnifiers] Magnifier standards

        I purchased a hand held magnifier which was advertised as 8X but the
        manification was less than the 5X I had been using. I purchased it from
        a company in Canada. Is the standards different in Canada or did I get
        ripped off?
      • Loy
        I got the right magnifier. I got a 10X pocket magnifier and it magnifies less than the 5X Bausch & Lomb I have been using. Maybe the Chinese supplier
        Message 3 of 11 , Oct 25, 2008
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          I got the right magnifier. I got a 10X pocket magnifier and it magnifies less than the 5X Bausch & Lomb I have been using. Maybe the Chinese supplier misrepresented them to the company. I could not believe that they could sell a 10X pocket magnifier for $3.99. I did contact them and they Sid I was the only one to have complained.
          ----- Original Message -----
          From: "Jennifer Jesso" <jen_jesso@...>
          To: <magnifiers@yahoogroups.com>
          Sent: Saturday, October 25, 2008 2:43 PM
          Subject: RE: [magnifiers] Magnifier standards


          I would contact them and find out if you got shipped the wrong magnifier.
          That's happened to me before. The standards are the same worldwide.

          Jen

          -----Original Message-----
          From: magnifiers@yahoogroups.com [mailto:magnifiers@yahoogroups.com] On
          Behalf Of randall2845
          Sent: Saturday, October 25, 2008 11:34 AM
          To: magnifiers@yahoogroups.com
          Subject: [magnifiers] Magnifier standards

          I purchased a hand held magnifier which was advertised as 8X but the
          manification was less than the 5X I had been using. I purchased it from
          a company in Canada. Is the standards different in Canada or did I get
          ripped off?






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          http://www.magnifiers.org
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        • Jennifer Jesso
          I do believe magnifiers vary in quality, though I m not sure how this works. I had a low vision specialist once show me two magnifiers that were both 10x
          Message 4 of 11 , Oct 25, 2008
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            I do believe magnifiers vary in quality, though I'm not sure how this works.
            I had a low vision specialist once show me two magnifiers that were both 10x
            power, but I was not able to see the print with one and was able to see it
            with the other. He said the difference was the optics, and of course the one
            that was better was much more expensive, by several hundred dollars. So I do
            think price makes a difference in quality, which could affect the resulting
            image quality.

            Do you mind mentioning which company you bought it from? I'm just curious.

            Jen
          • Barbara J. Milleville
            I m told diopters is a more accurate way to compare mags. The $3.99 price would have been a red flag for me. Barbara _____ From: magnifiers@yahoogroups.com
            Message 5 of 11 , Oct 25, 2008
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              I'm told diopters is a more accurate way to compare mags. The $3.99 price
              would have been a red flag for me.



              Barbara

              _____

              From: magnifiers@yahoogroups.com [mailto:magnifiers@yahoogroups.com] On
              Behalf Of Jennifer Jesso
              Sent: Saturday, October 25, 2008 4:31 PM
              To: magnifiers@yahoogroups.com
              Subject: RE: [magnifiers] Magnifier standards



              I do believe magnifiers vary in quality, though I'm not sure how this works.
              I had a low vision specialist once show me two magnifiers that were both 10x
              power, but I was not able to see the print with one and was able to see it
              with the other. He said the difference was the optics, and of course the one
              that was better was much more expensive, by several hundred dollars. So I do
              think price makes a difference in quality, which could affect the resulting
              image quality.

              Do you mind mentioning which company you bought it from? I'm just curious.

              Jen



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            • Loy
              I got them from the following link. I just emailed him and asked him to check them out. He said he is totally blind himself, but would have someone to do it
              Message 6 of 11 , Oct 25, 2008
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                I got them from the following link. I just emailed him and asked him to check them out. He said he is totally blind himself, but would have someone to do it for him. You may be correct about the quality makes a difference.

                http://www.braillebookstore.com/view.php?C=Hands-On+Braille
                ----- Original Message -----
                From: "Jennifer Jesso" <jen_jesso@...>
                To: <magnifiers@yahoogroups.com>
                Sent: Saturday, October 25, 2008 4:31 PM
                Subject: RE: [magnifiers] Magnifier standards


                I do believe magnifiers vary in quality, though I'm not sure how this works.
                I had a low vision specialist once show me two magnifiers that were both 10x
                power, but I was not able to see the print with one and was able to see it
                with the other. He said the difference was the optics, and of course the one
                that was better was much more expensive, by several hundred dollars. So I do
                think price makes a difference in quality, which could affect the resulting
                image quality.

                Do you mind mentioning which company you bought it from? I'm just curious.

                Jen


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                http://www.magnifiers.org
                Make It Visible!



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              • Kathy Seven Williams
                Magnifiers vary extremely in quality. If you have ever been fitted with glasses you ll remember the better worse game which those of us with low vision usually
                Message 7 of 11 , Oct 25, 2008
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                  Magnifiers vary extremely in quality. If you have ever been fitted with
                  glasses you'll remember the better worse game which those of us with low
                  vision usually only can play in full diopter increments, but which others
                  play in quarter diopter jumps. Better worse adn be at the same magnification
                  with other perameters changed in the lense. Also a well cut, finely made
                  lens is going to give clearer magnification than the plastic one from the
                  crack-n-the-Jack box (look ma! no copyright infringement)... If you can see
                  the difference, good magnifying glasses are a better buy. If you can't see
                  it, don't bother.

                  There are all sorts of formulas I no longer remember about magnification
                  because I haven't worked inthe field for decades now. But magnification on
                  your CCTV is different from that with your hand held lens. 16 diopter
                  handheld lens will give you 4 X magnification I believe in other words it
                  takes 4 diopters to increase the image one time height and width. Some
                  devices such as bar magnifiers only magnify in one direction so you get tall
                  skinny characters when looking at print with the height magnified and the
                  width left alone.
                  So my expensive specticle mounted 65 diopter magnifier is giving me just a
                  tad over 15X magnification. Do the math as I"m too old for it, but this
                  means that the 5 X magnifier is 20 diopters and the 8 X is 32 diopters.
                  Differences can certainly be accounted for by quality of lens and
                  manufacturing standards. That much of a difference so you'd read better with
                  the 5X than the 8X...possibly. But be sure you're comparing apples to
                  apples. Is the 8X really 8X or is it 8 diopters which would only give you
                  2X? That would make a huge difference.

                  If you wish to prolong this headache go read
                  http://www.bertech.com/product8/magnifi_notes.htm
                  for the details in other words probably more accurate than mine.

                  A lesson here is if you ccan't afford the expensive, good quality lenses,
                  get a stronger lens in the lower priced version than you think you need and
                  give it a go.

                  While they were saying among themselves it cannot be done, it was done.
                  Helen Keller

                  Kathy Seven Williams






                  [Non-text portions of this message have been removed]
                • Loy
                  Thanks for the information. These magnifiers do say 8X and 10X they don t give the diopter. They are round and they are clear image just not as large as they
                  Message 8 of 11 , Oct 25, 2008
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                    Thanks for the information. These magnifiers do say 8X and 10X they don't give the diopter. They are round and they are clear image just not as large as they should be.
                    ----- Original Message -----
                    From: "Kathy Seven Williams" <kseven@...>
                    To: <magnifiers@yahoogroups.com>
                    Sent: Saturday, October 25, 2008 8:33 PM
                    Subject: RE: [magnifiers] Magnifier standards


                    Magnifiers vary extremely in quality. If you have ever been fitted with
                    glasses you'll remember the better worse game which those of us with low
                    vision usually only can play in full diopter increments, but which others
                    play in quarter diopter jumps. Better worse adn be at the same magnification
                    with other perameters changed in the lense. Also a well cut, finely made
                    lens is going to give clearer magnification than the plastic one from the
                    crack-n-the-Jack box (look ma! no copyright infringement)... If you can see
                    the difference, good magnifying glasses are a better buy. If you can't see
                    it, don't bother.

                    There are all sorts of formulas I no longer remember about magnification
                    because I haven't worked inthe field for decades now. But magnification on
                    your CCTV is different from that with your hand held lens. 16 diopter
                    handheld lens will give you 4 X magnification I believe in other words it
                    takes 4 diopters to increase the image one time height and width. Some
                    devices such as bar magnifiers only magnify in one direction so you get tall
                    skinny characters when looking at print with the height magnified and the
                    width left alone.
                    So my expensive specticle mounted 65 diopter magnifier is giving me just a
                    tad over 15X magnification. Do the math as I"m too old for it, but this
                    means that the 5 X magnifier is 20 diopters and the 8 X is 32 diopters.
                    Differences can certainly be accounted for by quality of lens and
                    manufacturing standards. That much of a difference so you'd read better with
                    the 5X than the 8X...possibly. But be sure you're comparing apples to
                    apples. Is the 8X really 8X or is it 8 diopters which would only give you
                    2X? That would make a huge difference.

                    If you wish to prolong this headache go read
                    http://www.bertech.com/product8/magnifi_notes.htm
                    for the details in other words probably more accurate than mine.

                    A lesson here is if you ccan't afford the expensive, good quality lenses,
                    get a stronger lens in the lower priced version than you think you need and
                    give it a go.

                    While they were saying among themselves it cannot be done, it was done.
                    Helen Keller

                    Kathy Seven Williams






                    [Non-text portions of this message have been removed]


                    ------------------------------------

                    The Screen Magnifiers Homepage
                    http://www.magnifiers.org
                    Make It Visible!



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                  • Haverp@aol.com
                    Magnifiers should really be selected based on their diopter power, this is the standard mewsurement. There is no standard for magnification. In a message
                    Message 9 of 11 , Oct 25, 2008
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                      Magnifiers should really be selected based on their diopter power, this is
                      the standard mewsurement. There is no standard for magnification.


                      In a message dated 10/25/2008 2:34:38 P.M. Eastern Daylight Time,
                      loyrg2845@... writes:




                      I purchased a hand held magnifier which was advertised as 8X but the
                      manification was less than the 5X I had been using. I purchased it from
                      a company in Canada. Is the standards different in Canada or did I get
                      ripped off?




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                      [Non-text portions of this message have been removed]
                    • Haverp@aol.com
                      The closer the magnifier is held to your eye, the greater the magnification will be. So if you hold the magnifier close to your eye and move the page you are
                      Message 10 of 11 , Oct 25, 2008
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                        The closer the magnifier is held to your eye, the greater the magnification
                        will be. So if you hold the magnifier close to your eye and move the page
                        you are looking at for focusing instead of moving the magnifier, you will get
                        greater magnification.
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                        [Non-text portions of this message have been removed]
                      • BruceHP
                        You might want to search under Geology hand lenses. You can buy a fine B&L 10X magnifier for under $50. Any more than $100 is always a rip-off. My favorite
                        Message 11 of 11 , Oct 26, 2008
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                          You might want to search under Geology hand lenses. You can buy a
                          fine B&L 10X magnifier for under $50. Any more than $100 is always a
                          rip-off.

                          My favorite hand lens is a "blade" on the Victornox Swiss Arny knife.

                          On Sun, Oct 26, 2008 at 2:34 AM, <Haverp@...> wrote:
                          > The closer the magnifier is held to your eye, the greater the magnification
                          > will be. So if you hold the magnifier close to your eye and move the page
                          > you are looking at for focusing instead of moving the magnifier, you will get
                          > greater magnification.
                          > **************Play online games for FREE at Games.com! All of your favorites,
                          > no registration required and great graphics – check it out!
                          > (http://pr.atwola.com/promoclk/100000075x1211202682x1200689022/aol?redir=
                          > http://www.games.com?ncid=emlcntusgame00000001)
                          >
                          >
                          > [Non-text portions of this message have been removed]
                          >
                          >
                          > ------------------------------------
                          >
                          > The Screen Magnifiers Homepage
                          > http://www.magnifiers.org
                          > Make It Visible!
                          >
                          >
                          >
                          > Yahoo! Groups Links
                          >
                          >
                          >



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