Re:snorkel mask w/ prescription lenses. to correct my nearsightedness, do I enter the ""DV" or "NV" number? my NV is 2.25. should I order 2.5?
65715
I ordered the mask for my girlfriend who is near-sighted. She gave me a copy of her prescription. Under the "Dist" part of her prescription, sphere is -8.5 which is the number I used when I placed my mask order. I am assuming "DV" is distance, and "NV" is near. If so, I believe you would enter the "DV" number. The mask worked great for my girlfriend. She said she could see better out of the mask than her glasses. Hope that helps, Brian H.
863061
I am so accustomed to wearing a snorkel, I haven't noticed that it impairs vision at all. I wear goggles every swim so, I would say its safe to wear a mask.
40139
That's the method we used when buying my daughter's goggles. She ended up with -3.625 (R) and -4.25 (L) so we split the difference with a -4 prescription. She says they work well enough for her, and she has to be read a white board to get her workout during swim practice.
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,
323510
I just looked at mine and it shows "B+W 58 010 UV - Haze 1x MRC". Not sure if you can specify the exact one you want in this listing. The manufacturers website is at: https://www.schneideroptics.com/Ecommerce/CatalogItemDetail.aspx?CID=630&IID;=5722B&H; Photo says the filter factor is 1.0.
394462
Yes, that is what it means. I did the same thing that Wanda did. When I went to the Optometrist and got bifocals for work I mentioned that I just got drugstore glasses for reading at home. He asked what power I was buying and I said 225's and he said "Well, next time you buy some get 250's which I did. I love these glasses, they look nice and fit comfortably. Get them.
2212259
The "Telephoto Lens" that came with this package is a "Vivitar Series 1 - High Definition 2.2x58mm" with the number 1090413 on the lens itself. Maybe I am stupid but I do not know what IS means. On the folded paper that came with the lens, which is the "user guide", there is nothing on the paperwork that would indicate IS, whatever that is.
886612
If I understand your Query correctly you need to wear reading glasses. Correct? The EOS Canon cameras have a pretty extensive range of adjustability built in. If you need something additional (rather unlikely) then match the diopeter number to the number you wear with your reading glasses. Such as +1.5 or +2.5...I purchased this adjustment lenses but actually found out the Canon had the correct adjustment on the camera for me around +1.75. So I don't use this piece.
1025376
Sorry, but I don't have an expert answer. Here's what I did. I simply measured, with a very accurate ruler the exact outside center cross distance on the lens. No matter if it measures in inches or metric, just Google the number for a conversion. Worked perfect for me on the first and subsequent orders.. The covers fit perfect, are very well made and I'm very happy to have this protection for all of my lenses. Hope this "grass-roots" method works for you. Bob D., Maine
1350283
There is two ways of getting your S/N#: (1) On the len's focus ring, you will see "A009N-xxxxxx" (just on the left of MAKE IN JAPAN"). P.S. The xxxxxx is etched onto the lens. (2) The S/N# is on the top left corner of the original tamron box. It is kind of big. P.S. I have to cut it out from the box in order to get the current $100 rebate from Tamron. If you cannot find it, you should bug the seller on why. May be it is gray market, or second hand. Good luck.KC
1509181
I recently had cataract surgery and I am now farsighted. Standard 5X magnification didn't help at all, so I went for the highest one I could find. If a 5X doesn't work at all for you, go for the highest magnification.
2198378
We can ship either the 48 or 51 eye size. Because these run small, we usually ship the 51. If you prefer the 48, please just note that, and we will send that size. Thanks, Judy
82129
I think -4.0 and -4 are the same. If you are near-sighted, you should choose negative.
1652322
If I understand your Query correctly you need to wear reading glasses. Correct? The EOS Canon cameras have a pretty extensive range of adjustability built in. If you need something additional (rather unlikely) then match the diopeter number to the number you wear with your reading glasses. Such as +1.5 or +2.5...I purchased this adjustment lenses but actually found out the Canon had the correct adjustment on the camera for me around +1.75.So I don't use this piece.
57696
Do you mean size or prescription strength? As mentioned below they are adjustable in size, although very difficult to change size of nose bridge. As for the prescription, they come in negative values. My prescription is different in each eye. -2.75 and -3.75. I picked one in the middle -3.00. They are great.
1503374
The 25 and 36 refer to the size of the lens opposite the eyepiece in mm. The larger the lens the more light it gathers. This of course makes for a heavier monocular and a larger one. I have a 10x25 and it is fine. You have to have a steady hand though in using the devise.
1216096
I have different sizes for different areas. I have been using the 1.0 for my face, 0.5 for around the eyes and 2.0 for body areas. I hope this helps. I actually did my face last night.