Diopter Lens Slots

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I am slightly short sighted and have astigmatism. Technically I should wear glasses under my goggles or at least contact lenses. Since I could never commit to contact lenses - I simply can not get used to the idea to stick stuff into my eye - I usually flew without glasses in my boxed goggles.

Now that I committed to some proper FPV goggles - the Skyzone Sky03O I decided to get some proper diopters for those. I mean if you commit to proper goggles, then why not simply go the extra mile to get the most out of them? And with those goggles, there is obviously no way to fit regular glasses inside.

I found Jürgen from Optik Fischer - he is an optician from Germany and will manufacture diopters for your FPV goggles - and he ships world wide. You simply send him the specs for your prescription glasses and he will manufacture a set of diopters fitting your exact needs. He is able to make lenses for every goggle that has inserts to fit diopters - so basically every goggle except for the Fatshark HDO2.

Diopter is a term used to identify the refractive (light bending) capacity of a lens. A higher diopter indicates a higher refractive capacity, and a greater magnification. You can learn more about diopter on Wikipedia. Diopter lenses for the Nikon FA, FM, FM-2, FE and FE-2 will fit the X-Pro 1. Thanks - that's nice to know. Nikon quality should certainly be every bit as good.AND they do them in 1/2 strength too. But alas I just can't find any that I'd want on present search. Diopter filters are just like a magnifying glass for your lens. They also shift the minimal focus distance so you can get macro shots without having to use a macro lens. They can be used to increase the magnification of a lens when you need to get really close-up images of small objects. I'm farsighted but can get lenses from reading glasses cheaply. It looks like Fat Shark 5.8 GHz and 2.4 GHz 2010 and Base Edition goggles all have the slots for Fat Sharks optional negative diopter lenses. Lenses with a focal length – defined as the distance between the center of a lens and its focal point – of 1 meter (about 39 inches) have a diopter strength of 1. Since diopter strength is based on the inverse of the focal length, a 2 diopter lens is not 2 meters but 1/2 meter, a 3 diopter lens is 1/3 meter and so forth.

I talked to him a bit beforehand to find out what I could expect. He suggested the following experiment: Take your glasses off and look at something that is about six meters away from you. Then put on your glasses and compare. This was a pretty drastic difference for me, so I decided to get the diopters.

During all of our communication Jürgen was very patient and thorough, I immediately felt that he knows what he is talking about and that I could trust him.

I went to my ophthalmologist to test my sight, since it was more than a year ago that I had my last checkup and I wanted to order diopters with my most recent values.

I printed the form from his website and asked the doctor to fill that out for me. I then sent it to Optik Fischer, paid via PayPal and three days later I had my lenses in the post box (I am from the EU, so shipping to other countries will probably take longer).

Depending on your FPV goggles the lenses will come in a 3D printed frame that you simply slide into the diopter slots of your goggles.

Obviously I could not wait to try them out, and I have to say, I was impressed from the get go. The diopters fit perfectly into the lens slots on my Sky03O goggles. The fit is tight and they do not fall out, even when shaking the goggles.

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And most importantly - they work perfectly. I can especially notice the difference in the OSD menus where I can finally ready everything without issues. Generally, the picture is much more in focus.

In my opinion those lenses were really a great investment.

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I can recommend getting custom lenses to everyone that has prescription glasses and does not want to use contact lenses.

If you oreder the “deluxe” version with anti-reflex and hardened coating you pay around $100 including shipping. For the standard version you pay around $60 including shipping. The prices vary a bit depending on your FPV goggles, but this is the range you can expect.

  • Questions? ∨
What diopter (or lens power) monocle is right for me?
The best way to determine your needed visual correction is to visit your optometrist. He or she will be able to check your vision and provide an accurate assessment of your needs.
If you already wear reading glasses, then choose a monocle that is the same diopter as your current reading glasses, rounding up to the nearest 0.50 diopter. For example: if your reading glasses are +1.25, get a monocle that is +1.50. If your reading glasses are +2.75, then get a monocle that is +3.00.
Finally, you can also use our Home Eye Test to test your vision to approximate your needed vision correction:
  1. Print out the test and follow the on-page instructions
  2. Order your monocle and enjoy!

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Do you sell +1.25 or +1.75 diopter monocles? What about other +0.25 increments?
Unfortunately we only offer our monocles in diopter increments of +0.5. However, the difference between a +1.25 lens and a +1.50 (or +1.75 and +2.00) diopter lens is quite small. We recommend 'rounding up' to the nearest +0.50 diopter.
And - if you absolutely must have a +1.25 (or other +.25 increment) lens, then we will be happy to create a custom Prescription Monocle to meet your needs.

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What is diopter?

Diopter is a term used to identify the refractive (light bending) capacity of a lens. A higher diopter indicates a higher refractive capacity, and a greater magnification.

DiopterMagnification
Focal Length (cm)Focal Length (in)
0.0 (No magnification)1.00 X (Actual size)
0.51.13 X20079
1.01.25 X10039
1.51.38 X6726
2.01.50 X5020
2.51.63 X4016
3.01.75 X3313
3.51.88 X2911
4.02.00 X2510

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You can learn more about diopter on Wikipedia.