Nikon DK-20C Diopter +0.5 for many Digital SLR's Cameras


About Nikon DK-20C

Optional Nikon eyepiece diopters allow you to optimize your SLR viewfinder's sharpness in conjunction with your individual eyesight.Eyepiece diopters are designed for specific camera models and are identified by a plus, a minus or a neutral numeric diopter value. .

Standard eyepieces supplied with Nikon SLR cameras have no corrective value and are for dust protection only. Select eyepieces are supplied with a rubber coating designed to lessen scratching of a photographer's eyeglasses. .

Nikon SLR cameras (without built-in adjustable eyepiece correction) have a base diopter value of minus one. This is why you won't find an accessory Nikon eyepiece diopter valued at minus one. Minus one is considered the optimum starting point for the majority ofSLR 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. .

Neutral correction eyepieces do not replace the supplied standard eyepiece. The use of a neutral correction eyepiece will change thediopter value of the camera from minus one to zero.

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.

Some Nikon SLR Cameras have built-in adjustable eyepiece correction. Please check your instruction manual to see if additional threaded Nikon eyepiece diopters can be combined with your camera's built-in diopter control.

For cameras with built-in diopter control, use additional Nikon eyepiece diopters only if your vision dictates that optimum viewfinder sharpness cannot be achieved with the built-in diopter adjustment control.

Summary of Customer Reviews

Customers most agreed on the following attributes:
Easy to use (10),Lightweight (8),Durable (6),Improves function (5),Reliable (3)
Best Uses:
Everyday (6),Macro photography (5),Everyday use (4),Home (4),Studio (4),Landscape photography (3),Portraits (3)
Reviewer Profile:
Enthusiast (10)

Nikon DK-20C Features

  • Compatible with D3000, D300S, D3100, D5000, D5100, D7000, D90

Nikon DK-20C Reviews

Review Snapshot®


(based on 18 reviews)


of respondents would recommend this to a friend.

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 18 customers


Follow order instructions


from Houston  -  Hobbyist/Enthusiast

Can't rate product since I ordered the +2 thinking that was what I needed since my reading glasses are that strenght. Big miss. Not worth the hassle to return because of the price. I will get the right one, once I visit my eye doctor and she tells me what the strenght should be. No problems fitting it into my D5000, the only thing is you will have to McGyver the rubber eye protector that came with the camera, otherwise it does not fit once you put this adapter in




from Baldwin, NY  -  Semi-pro Photographer

It works perfectly with my viewfinder. Now I have to remember to take my glasses OFF! I can live with that.


nikon diopter


from steamboa springs co  -  Getting Started

It should come with installation instructions


Needed this


from Houston, TX  -  Professional

20/20 vision as a young wippersnapper, older than dirt now and this is a neccessity when using the viewfinder!


Helps with Near Sighted viewing


from San Diego  -  Hobbyist/Enthusiast

Fits directly onto the camera and allows the eye ring to be fitted onto the diopter. Allows me to use the viewfinder without my glasses. You just need to know which strength you need. I asked my optometrist.


Excellent Product!


from Philadelphia, Pa.  -  Hobbyist/Enthusiast

It worked great. I was at the end of my adjustment on the camera, and now somewhere in the middle. I can finally judge focus without using glasses!


Very satisfying


from Duluth, GA  -  Getting Started

I got a Nikon 7100 — the only SLR I've used since I rented a Nikon and three great lenses for a trip to the Florida Keys in about 1975. I loved shooting that holiday, but have not had an SLR in my hands five times since then. My eyes were very good until I began to age; now I'm 64 and currently trying trifocals. I use +2.5 reading glasses for computer screens, higher for books. With this little lens inserted and a quick adjustment of the camera diopter, the focus through the viewfinder snapped like it had when I was 25. It is an enormous treat — my world is never in focus like this any more. Before the DK-20C arrived, I had the in-camera diopter adjusted to work with the long focal length of my trifocals; that was okay and no doubt I'll shoot that way a lot of times again, but with that setup I had to scan around the edges of the viewfinder to establish framing — and 'right focus' was a little too much hope and too little confidence. There is plainly plenty of room for me to adjust the camera diopter as the months and years pass, so that I feel quite assured that this device will work for me (like this!) for years (or until I lose it and have to get another). The nice way the D7100 puts the shooting controls on the right under hand means that, effectively, once I have located a subject with my glasses on I can inspect it, adjust and shoot, without needing to put them back on. I'm just really happy with this and recommend it highly to someone who has aging eyesight.


No more shooting with eyeglasses on!


from Oak Ridge, TN  -  Photo Enthusiast

Best part - is just what my eyes need when not wearing glasses by letting me see more clearly through viewfinder. No fun using the viewfinder with glasses. The not so good part - came partially off when putting camera in bag, and ended up breaking one of the holding arms on the diopter. Now to order another. In fact, ordering 3 more. If you buy - buy extra. But I do highly recommend if you don't like wearing corrective eyeglasses when shooting.


works, but eyecup a problem


from Dana Point CA  -  Hobbyist/Enthusiast

I have 2.5 correction glasses so this was necessary to correct the diopter. Easy to install and works, but the eyecup is difficult to re-install after the diopter is installed


Worked Great


from Avila Beach, CA  -  Hobbyist/Enthusiast

My eyesight is corrected using monovisison where my left eye is corrected for reading and my right eye is corrected for distance vision. Since I use my left eye with my Nikon D300 viewfinder I needed more correction than the -2.0 diopter adjustment available through the camera viewfinder. The DK20C -2.0 snapped onto my eyepiece giving me a total of -4.0 diopter which was perfect for my needs. Up till now I have struggled with a fuzzy viewfinder view.


Questions & Answers Powered by TurnTo®

Questions about this item:

Shopper  Will the DK-20 fit a D3100 and does it simply fit into the existing removable eyepiece or replace the eyepiece? Thanks
Andrew R  Yes, the DK-20C diopter is compatible with the D3100 and should replace the existing eyepiece when installed.
Shopper  will this work on my D-40 ?
Andrew R  Unfortunately no, Nikon indicates that this eyepiece is not compatible with the D40.
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