Nikon Diopter -4.0 Correction Eyepiece for D50/70/70S/100/200, N50/60/65/70/80/6006, Pronea, FM10 cameras

by Nikon

Product Details

• Item Weight: 1.6 ounces
• Shipping Weight: 1 pounds (View shipping rates and policies)
• Shipping: Currently, item can be shipped only within the U.S.
• ASIN: B00009R8TV
• Item model number: B00009R8TV
• Average Customer Review: 4.0 out of 5 stars  See all reviews (1 customer review)
• Amazon Best Sellers Rank:
  • #47 in Camera & Photo > Accessories > Filters > Color Correction & Compensation Filters
• Date first available at Amazon.com: June 17, 2003

Product Description

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.

Product Description

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 arriv

Customer Reviews

Most Helpful Customer Reviews

1 of 1 people found the following review helpful:

4.0 out of 5 stars Rubber eyepiece will not fit onto the diopter, February 3, 2010

By 

Lawrence L. So (San Francisco, CA USA) - See all my reviews
(REAL NAME)   

Amazon Verified Purchase

This review is from: Nikon Diopter -4.0 Correction Eyepiece for D50/70/70S/100/200, N50/60/65/70/80/6006, Pronea, FM10 cameras (Electronics)

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 away
2. 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 necessary
6. Once objects can both be viewed and shot in focus, the diopter control is set. Now enjoy taking pictures!


Model DK-20C
Made in Japan
This also fits the D90.