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Small round eyepiece lens in black plastic frame

Nikon Inc

Nikon DK-20C +1.0 Diopter Correction Eyepiece

SKU CH-4DP5-J21PB

A +1.0 diopter correction eyepiece that sharpens viewfinder focus for compatible Nikon SLR cameras

  • +1.0 diopter sharpens focus for near-sighted users
  • Fits D50, D70, D70S, D100, D200 digital SLRs
  • Works with N50, N60, N65, N70, N80, N6006 film bodies
  • Compatible with Pronea APS and FM10 manual cameras
  • Replaces standard eyepiece to add corrective optical value

Purpose and Compatibility

The Nikon DK-20C +1.0 Diopter Correction Eyepiece is an optional viewfinder accessory that adds a +1.0 diopter correction for photographers with slight vision impairments. It fits a wide range of Nikon digital SLR and film SLR bodies, including the D50, D70, D70s, D100, D200, N50, N60, N65, N70, N80, N6006, Pronea and FM10 models. The eyepiece replaces the standard dust-protection eyecup to provide corrective optical value tailored to the user's eyesight.

Optical Function and Build

The accessory combines with the camera's base viewfinder value of minus one to deliver the final correction, so the user simply selects the diopter number that matches their prescription without additional calculation. Constructed to Nikon's standard, it is built to withstand regular use in varied shooting conditions while maintaining optical clarity. The correction sharpens the viewfinder image, allowing more precise manual or autofocus confirmation.

Sustained Use Behaviour

During extended shooting sessions the diopter remains securely seated in the viewfinder housing and retains its corrective power without drift. The optical surfaces resist normal handling and environmental exposure, so focus accuracy stays consistent from the first frame to the last. No power source or electronic communication is involved, meaning performance is unaffected by battery state or camera firmware.

Highlights

  • +1.0 diopter sharpens focus for near-sighted users
  • Fits D50, D70, D70S, D100, D200 digital SLRs
  • Works with N50, N60, N65, N70, N80, N6006 film bodies
  • Compatible with Pronea APS and FM10 manual cameras
  • Replaces standard eyepiece to add corrective optical value

Specifications

No published specifications for this item yet.

Questions about this item

How do I install the DK-20C +1.0 diopter on my D200, and what step causes fitment issues?

Unscrew the standard eyepiece by turning it counter-clockwise, then thread the DK-20C on until it seats firmly. The step people miss is removing the small rubber eyecup first; leaving it on prevents the diopter from threading fully.

What maintenance or replacement will this diopter need over time?

The glass only needs occasional cleaning with a microfibre cloth and lens fluid. There are no moving parts or consumables, so the unit itself does not require scheduled replacement unless the coating is scratched or the threads are damaged.

What is the practical limit of this +1.0 correction when I shoot for long periods?

The diopter adds +1.0 to the camera's built-in -1.0 base, yielding a neutral 0 setting. If your eyesight requires more than +1.0 total correction, the viewfinder will remain slightly soft during extended sessions, signalling the limit of this specific eyepiece.

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