Diopters

Generally, diopters are lens attachments that shorten the close focus distance of lenses by reducing the focal length of the optical system. 

Their strength is given as reciprocal of focal length in meter (so called diopter), e.g.:
+ 1 diopter = 1 meter infinity focus plane
+ 2 diopter = 0.5 meter infinity focus plane

Here at Schneider-Kreuznach we offer three different types of diopters: 

Diopter Full
Classic full diopters reduce the close focus distance and even allow you to take macro images without using a dedicated macro lens. 

Diopter Split
A split diopter is a standard diopter element which is precision-cut in half and mounted in a ring. It allows you to focus both fore- and background at the same time. Hence, it can attract the viewer's attention to an object in the back while the main scene remains focused. 

Diopter Spot
Basically, a spot diopter is a classic diopter with a plain, polished area in its center. This leads to a sharp image in the middle and an out-of-focus area towards the edges. For dreamy images with an in-focus center.

For more info, check our Factsheets below. 

Diopter Full


  • Reduce close focus distance
  • Macro images without dedicated macro lens:
    Bringing out the sharpest detail in tiny subjects
  • Diopter strengths: +1/4, +1/2, +1, +2, +3
  • No exposure compensation needed
  • Broadband coating (BBAR)
  • New: Available as drop-in and screw-in filters

Diopter Split


  • Focuses both fore- and background
  • Creates second area of focus
  • Diopter strengths: +1/4, +1/2, +1, +2, +3
  • Usable in compatible matte boxes
  • No exposure compensation needed
  • Broadband coating (BBAR)

Diopter Spot


  • Sharp image center, out-of-focus edges
  • Plain area in the center: 25 mm or 50 mm
  • Diopter strengths: +1/2, +1, +2
  • Usable in compatible matte boxes
  • No exposure compensation needed
  • Broadband coating (BBAR)

Technical Specifications

StrengthsSizesMountingCoatingGlass Type
Diopter Full+1/4
+ 1/2
+ 1
+ 2
138 mm
4.5 inch
M95
Drop-In Filter Cell

Screw-In Filter
BBARN-BK 7
Diopter Split+1/4
+ 1/2
+ 1
+ 2
138 mm
4.5 inch
Drop-In Filter CellBBARN-BK 7
Diopter Spot+ 1/2
+ 1
+ 2
138 mmDrop-In Filter CellBBARN-BK 7

Filters in Use

Without filter

Diopter Full +1

Without filter

Diopter Spot - Sample Shot

Diopter Full +1/2

Diopter Full +2

Diopter Split

Diopter Spot - Sample Shot

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55543 Bad Kreuznach | Germany
+49 (0) 671 601 0

 

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