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Optional Nikon eyepiece diopters allow you to optimize your SLR viewfinder''s sharpness in conjunction with your individual eyesight. Nikon SLR cameras (without built-in adjustable eyepiece correction) have a base diopter value of minus one. Minus one is considered the optimum starting point for the majority of SLR users with normal vision. The combination of the camera''s viewfinder components and a clear (standard) eyepiece form a virtual image of a subject on the camera''s focusing screen that is the approximate equivalent of a viewing distance of one meter. Each Nikon eyepiece diopter incorporates a numerical value, represented by a minus value (nearsighted) or a plus value (farsighted) number, enabling you to select the appropriate diopter for your vision and your camera model. For D300, D200, D100, D90, D80, D70, D60, D50, D40, N80, N75, N70, N65, N60, N55, N50, Pronea, N2-4-5-6000 Series & FM/FE10 Cameras
From the Manufacturer
The Nikon -4.0 Correction Eyepiece is an optional Nikon eyepiece diopter that allows you to optimize your SLR viewfinder's sharpness in conjunction with your individual eyesight. Nikon SLR cameras (without built-in adjustable eyepiece correction) have a base diopter value of minus one. Minus one is considered the optimum starting point for the majority of SLR users with normal vision. The combination of the camera's viewfinder components and a clear (standard) eyepiece form a virtual image of a subject on the camera's focusing screen that is the approximate equivalent of a viewing distance of one meter.
Each Nikon eyepiece diopter incorporates a numerical value, represented by a minus value (nearsighted) or a plus value (farsighted) number, enabling you to select the appropriate diopter for your vision and your camera model.
The eyepiece's diopter value is, when combined with the viewfinder's minus one value, the end-result value. No combination of the camera's base value of minus one and a given accessory diopter's value is required to arrive at the final desired value. In other words, if you require a diopter of plus 3, simply add a plus 3 diopter to your camera.
To determine which Nikon diopter value is best suited for you, visit your ophthalmologist, optometrist or dispensing optician. Ask them to determine your diopter from (your corrective prescription) when viewing an object at distance of approximately one meter. Base your selection on this diopter value.
This eyepiece is compatible with the Nikon D50, D70, D100, N50, N60, N65, N70, N80, N6006, Pronea, and FM10 cameras.
Johny
Reviewed in France on January 17, 2025
Tres bon produit
Customer
Reviewed in Japan on March 10, 2022
OM-10にも問題無くはまります。ファインダーが大変見やすくなりました(^^)
Throwaway
Reviewed in the United States on September 7, 2020
It's a diopter piece, used to correct your vision when you're looking through the viewfinder, and -4.0 was what worked with my eyes. Although it was a tight fit and I struggled to get it on for a short bit of time, I was able to use it with my N6006 and can have my eyes focus properly now.
アマゾンカスタニャー
Reviewed in Japan on May 16, 2019
ニコンユーザーの方には申し訳ないのですが、Pentax SPという1960年代のフィルムカメラで使用しています。機能は申し分ないです。視力落ちてしまった方には強くオススメします。
SSB
Reviewed in the United States on July 7, 2016
Maybe now I can see to focus the camera. It does not appear to work with a rubber eyecup
Sidney
Reviewed in the United States on April 29, 2016
Now I can focus through the viewer - yay!
George K. Butterfield
Reviewed in the United States on September 22, 2013
Like all Nikon products it works exactly as specified, however in the case of the diopter you can only add this item once you remove the rubber lens shade, so you can now see the object but have lens glare!I modified mine so that it can be slid over the viewing lens and still have the rubber lens cover to stop glare, the mod took 2 min and looks and works like a Nikon product, I have no idea why they cannot improve this design
Mani
Reviewed in Germany on May 21, 2013
Die Korrekturlinse ließ sich einfach auf den Sucher aufsetzen, musste allerdings vorher gründlich gesäubert werden. Für mich reichen die -4 Dioptrin gerade so. Ohne die Linse war nach kurzer Zeit meine Brille immer verschmiert. Jetzt kann ich wenigstens die Fotos ohne Brille schießen.
artbarmal
Reviewed in the United Kingdom on January 19, 2013
Great Item but not good for my wifes eye sight so had to return it says -4 but could be out on reading
L. So
Reviewed in the United States on February 4, 2010
If you wear prescription glasses and look through the viewfinder, your glasses may get in the way. If this is annoying, diopter correction lenses allow you to see in focus through the viewfinder without wearing glasses.If you look through the viewfinder and it is out of focus even after using the diopter control adjuster, then you may want to get one of these correction lenses. How do you know which one to get? If you know what your eyeglass prescription is, then round up to the nearest number. For example, if your prescription is -3.50 (nearsighted), then get a -4 diopter. You can dial in the focus with with the diopter control on the camera once installed.The diopter correction eyepiece slides over the viewfinder tabs just like the rubber eyepiece (DK-21). However, once the diopter is fitted, the rubber eyepiece will NOT fit over the diopter. This seems like a design oversight. It looks like something is missing. There may be me a way to remove some plastic on the rubber eyepiece that allows for it to slide onto the diopter but it will not mount flush with the camera body; it will jut out due to the diopter lens between them.The lack of a rubber eyepiece that fits over the diopter is a minor aesthetic issue. It does what it is supposed to do to correct focus without wearing glasses so if you need one, get one.Here's a hint to find the correct focus with the correction diopter after it has been installed:1. focus on something far away2. point the camera on something close so that the image is out of focus (this makes step 3 easier)3. adjust the diopter control on the camera so that the auto-focus points (the lines and boxes you see through the viewfinder) are crisp and clear.4. take a few test shots using manual focus to see if the pictures came out as they looked through the viewfinder.5. repeat step 3 and 4 if necessary6. Once objects can both be viewed and shot in focus, the diopter control is set. Now enjoy taking pictures!Model DK-20CMade in JapanThis also fits the D90.
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