Eyepiece Graticules

The standard sizes of eyepiece graticules used to be 16, 19, and 21 mm. For your convenience, this has been greatly expanded to accommodate a variety of equipment without the need to special order. The following table will assist you in determining appropriate eyepieces for common brands.

Brand Reticle Diameter Marking on Eyepiece
Olympus Eyepieces 24 mm WHN10X, WHN10X-H WH10X, WH10X-H, WH15X
WHS10X-H, WHS15X-H CWH10X, CWH10X-H, CWH30X
GW10X GWH10X
GSWH10X, GSWH15X, GSWH20X, GSWH30X WH12.5X, WH12.5X-H
WHSZ10X-H, WHSZ15X-H, WHSZ20X-H, WHSZ30X-H GSWH10X-H, GSWH15X-H, GSWH20X-H, GSWH30X-H
20.4 mm WHK8X, WHK10X, WHK15X PE 2.5X/ 3.3X/ 4X/ 5X
NWHK10X, (*WHK10X-H cannot be installed) GWH15X-D, GWH15X-CD
NFK 2.5X/ 3.3X/ 5X/ 6.7X  
Nikon Eyepieces 27 mm CFI 10x, CFI 12.5x, CFI 15x, CFI UW 10x CFUW10X, CFUWN 10X
E1-CFI 10x, E2-CFI 10x, E2-CFI 15x SME 10x /23, SME 10x /21
SMZ 10 UW15x /17, SMZ 10 UW20x/15  
25 mm C-W 10x B/22 (C-W 10X A/22) L-W10x ESD (FOV 22)
SMZ U UW10x A/24, SMZ U UW15x  
Leica Eyepieces 26 mm 11507807 (S10x/22B.M) 11507808 (S10x/25Br.M)
11507801 (10x/20Br.M) 11507802 (10x/20Br.M)
11506515 (12.5x/16Br.M)  
23 mm 10447160 (10x/21B) 10445301 (16x/14B)
10445302 (25x/9.5B) 10445303 (40x/6B)
24.5 mm 10450023 (10x/23B) 10450024 (16x /15B)
10450025 (25x/9.5B) 10450026 (40x/6B)
10 446 333 (10x/23, adjustable) 13 613 532 (10x/20, focusing)
10 446 355 (16x/16, adjustable) 10 446 357 (20x/12, adjustable)
10 446 329 (10x/23B, adjust.f/eyeglasses) 10 447 131 (10x/23, adjustable)
10 447 133 (16x/16, adjustable) 10 447 135 (20x/126, adjustable)
10 447 137 (for eyeglasses10x/23B, adjustable) 10 447 139 (for eyeglasses16x/15B, adjustable)
10 445 302 (25x/9.5B, adjust.f/eyeglasses) 10 445 303 (40x/6B, adjust.f/eyeglasses)
10 447 280 (10x/20B, adjust.f/eyeglasses)  
Zeiss Eyepieces 26 mm E-PL 10x/20 Br. Foc PL 10x/21 Br Foc
PL 10x/23 Br. Foc  
23 mm WF 10x/18 WF 10X/20
21 mm PL16x/16 Br. Foc W 25x/10 foc
Kpl-W 10x/18 [#46 40 43-9902]  
This list is not comprehensive so please inquire if your eyepiece or brand is not listed.
Sort by
Product Name Ordering Info

Porton NG2 Eyepiece Graticule

For particle size and counting the circle areas and divisions on the right hand side of the rectangle increase with Root 2 progression. Divsions are numbered for convenience. Surface chrome image
Cat # Description Pack Price Quote Quantity
Cat #: 68024-16 Description: NG2 Porton Graticule, 16mm Pack: Each Price: $289.50 Add to Quote:
Cat #: 68024-19 Description: NG2 Porton Graticule, 19mm Pack: Each Price: $270.50 Add to Quote:
Cat #: 68024-21 Description: NG2 Porton Graticule, 21mm Pack: Each Price: $270.50 Add to Quote:

The New Porton NG-12 Graticule

Array of globes and circles 35 to 500 microns are conveniently close to where the particles pass to estimate size. Modified Porton pattern globes/circles, surface chrome image
Cat # Description Pack Price Quote Quantity
Cat #: 68032-16 Description: NG12 New Porton Graticule, 16mm Pack: Each Price: $263.00 Add to Quote:
Cat #: 68032-19 Description: NG12 New Porton Graticule, 19mm Pack: Each Price: $263.00 Add to Quote:
Cat #: 68032-21 Description: NG12 New Porton Graticule, 21mm Pack: Each Price: $263.00 Add to Quote:

British Standard Graticule NG10

Circle areas double progressively, covers particles in the range 150 micron to 0.38 micron, British Standard (BS3625/BS3260) Globes & Circles. Surface chrome image
Cat # Description Pack Price Quote Quantity
Cat #: 68026-16 Description: NG10 British Standard Graticule, 16mm Pack: Each Price: $289.50 Add to Quote:
Cat #: 68026-19 Description: NG10 British Standard Graticule, 19mm Pack: Each Price: $289.50 Add to Quote:
Cat #: 68026-21 Description: NG10 British Standard Graticule, 21mm Pack: Each Price: $289.50 Add to Quote:

Fairs Microscope Graticule NG5

Designed to extend the sizing range of globe and circle graticules, Fairs, grid length 4mm, glass sandwich.
Cat # Description Pack Price Quote Quantity
Cat #: 68033-16 Description: NG5 Fairs Graticule, 16mm Pack: Each Price: $263.00 Add to Quote:
Cat #: 68033-19 Description: NG5 Fairs Graticule, 19mm Pack: Each Price: $263.00 Add to Quote:
Cat #: 68033-21 Description: NG5 Fairs Graticule, 21mm Pack: Each Price: $263.00 Add to Quote:

Asbestos Fiber Analysis

Use for counting fibrous dust (asbestos or glass fibers. Particularly useful where the majority of fibers to be counted are shorter than 5 microns.
Cat # Description Pack Price Quote Quantity
Cat #: 68028-16 Description: G22 Walton & Beckett Graticule, 16mm Pack: Each Price: $326.50 Add to Quote:
Cat #: 68028-19 Description: G22 Walton & Beckett Graticule, 19mm Pack: Each Price: $326.50 Add to Quote:
Cat #: 68028-20.4 Description: G22 Walton & Beckett Graticule, 20.4mm Pack: Each Price: $326.50 Add to Quote:
Cat #: 68028-21 Description: G22 Walton & Beckett Graticule, 21mm Pack: Each Price: $326.50 Add to Quote:
Cat #: 68028-23 Description: G22 Walton & Beckett Graticule, 23mm Pack: Each Price: $326.50 Add to Quote:
Cat #: 68028-24.5 Description: G22 Walton & Beckett Graticule, 24.5mm Pack: Each Price: $326.50 Add to Quote:
Cat #: 68028-25 Description: G22 Walton & Beckett Graticule, 25mm Pack: Each Price: $326.50 Add to Quote:
Cat #: 68028-26 Description: G22 Walton & Beckett Graticule, 26mm Pack: Each Price: $326.50 Add to Quote:
Cat #: 68028-27 Description: G22 Walton & Beckett Graticule, 27mm Pack: Each Price: $326.50 Add to Quote:
Cat #: 68029-16 Description: G24 Walton & Beckett Graticule, 16mm Pack: Each Price: $326.50 Add to Quote:
Cat #: 68029-19 Description: G24 Walton & Beckett Graticule, 19mm Pack: Each Price: $326.50 Add to Quote:
Cat #: 68029-21 Description: G24 Walton & Beckett Graticule, 21mm Pack: Each Price: $326.50 Add to Quote:
Cat #: 68030-16 Description: G25 Walton & Beckett Graticule, 16mm Pack: Each Price: $326.50 Add to Quote:
Cat #: 68030-19 Description: G25 Walton & Beckett Graticule, 19mm Pack: Each Price: $326.50 Add to Quote:
Cat #: 68030-21 Description: G25 Walton & Beckett Graticule, 21mm Pack: Each Price: $326.50 Add to Quote:

Matthews Spray Droplet Graticule NE30

Used in conjunction with a 40X Microscope for direct measurements of droplets from 50-400 micron diameters. The actual pattern sizes are 50, 100, 200, and 400 microns.
Cat # Description Pack Price Quote Quantity
Cat #: 68003-16 Description: NE30 Matthews Spray Droplet 16mm Pack: Each Price: $303.00 Add to Quote:
Cat #: 68003-19 Description: NE30 Matthews Spray Droplet 19mm Pack: Each Price: $303.00 Add to Quote:
Cat #: 68003-21 Description: NE30 Matthews Spray Droplet 21mm Pack: Each Price: $303.00 Add to Quote:
Cat #: 68003-23 Description: NE30 Matthews Spray Droplet 23mm Pack: Each Price: $303.00 Add to Quote:
Cat #: 68003-50 Description: NE30 Matthews Spray Droplet, Custom Pack: Each Price: $385.00 Add to Quote:

Thompson Graticule

For counting particles in any of three areas of known size. Calibrated in the same manner as a normal eyepiece scale, Thompson for dust analysis, 10mm, 7mm, and 4mm squares, glass sandwich, diameter:
Cat # Description Pack Price Quote Quantity
Cat #: 68090-16 Description: G23 Thompson Graticule, 16mm Pack: Each Price: $328.50 Add to Quote:
Cat #: 68090-19 Description: G23 Thompson Graticule, 19mm Pack: Each Price: $328.50 Add to Quote:
Cat #: 68090-21 Description: G23 Thompson Graticule, 21mm Pack: Each Price: $328.50 Add to Quote:

Chalkley Point Array Graticule

Chalkley point array, surface chrome image, is used to quickly determine the relationship of components to each other.
Cat # Description Pack Price Quote Quantity
Cat #: 68034-16 Description: NG52 Chalkley Point Array Graticule, 16mm Pack: Each Price: $284.00 Add to Quote:
Cat #: 68034-19 Description: NG52 Chalkley Point Array Graticule, 19mm Pack: Each Price: $284.00 Add to Quote:
Cat #: 68034-21 Description: NG52 Chalkley Point Array Graticule, 21mm Pack: Each Price: $284.00 Add to Quote:

Pharmaceutical PSA Pattern Graticule G57

Pharmaceutical PSA Pattern. This graticule was designed for the pharmaceutical industry. However, it is also useful where particle size considerations are restricted to 10mm and 25mm.
Cat # Description Pack Price Quote Quantity
Cat #: 68091-19 Description: G57 Pharmaceutical Psa Pattern Graticule, 19mm Pack: Each Price: $328.50 Add to Quote:
Cat #: 68091-20.4 Description: G57 Pharmaceutical Psa Pattern Graticule, 20.4mm Pack: Each Price: $328.50 Add to Quote:
Cat #: 68091-21 Description: G57 Pharmaceutical Psa Pattern Graticule, 21mm Pack: Each Price: $328.50 Add to Quote:
Cat #: 68091-23 Description: G57 Pharmaceutical Psa Pattern Graticule, 23mm Pack: Each Price: $328.50 Add to Quote:
Cat #: 68091-24.5 Description: G57 Pharmaceutical Psa Pattern Graticule, 24.5mm Pack: Each Price: $338.00 Add to Quote:
Cat #: 68091-25 Description: G57 Pharmaceutical Psa Pattern Graticule, 25mm Pack: Each Price: $338.00 Add to Quote:
Cat #: 68091-26 Description: G57 Pharmaceutical Psa Pattern Graticule, 26mm Pack: Each Price: $338.00 Add to Quote:
Cat #: 68091-27 Description: G57 Pharmaceutical Psa Pattern Graticule, 27mm Pack: Each Price: $350.00 Add to Quote:

Counting Patterns Graticule

Counting pattern for soil analysis, 10mm square. Surface chrome image.
Cat # Description Pack Price Quote Quantity
Cat #: 68092-16 Description: NG14 Counting Pattern Graticule, 16mm Pack: Each Price: $291.50 Add to Quote:
Cat #: 68092-19 Description: NG14 Counting Pattern Graticule, 19mm Pack: Each Price: $270.50 Add to Quote:
Cat #: 68092-21 Description: NG14 Counting Pattern Graticule, 21mm Pack: Each Price: $270.50 Add to Quote:

Lennox Grain Analysis Graticule

The eyepiece reticle is used for Lennox grain size analysis. The pattern comprises and array of dashed squares and crosses.
Cat # Description Pack Price Quote Quantity
Cat #: 68004-16 Description: NG21 Lennox for Grain analysis 16mm Pack: Each Price: $310.50 Add to Quote:
Cat #: 68004-19 Description: NG21 Lennox for Grain analysis 19mm Pack: Each Price: $310.50 Add to Quote:
Cat #: 68004-21 Description: NG21 Lennox for Grain analysis 21mm Pack: Each Price: $310.50 Add to Quote:
Cat #: 68004-23 Description: NG21 Lennox for Grain analysis 23mm Pack: Each Price: $310.50 Add to Quote:
Cat #: 68004-50 Description: NG21 Lennox for Grain analysis, Custom Pack: Each Price: $415.50 Add to Quote:

Kotter Pattern - G48

Analysis of bitumous coal and anthracite. Used with 20x objective = calibration factor of 1. With 40x objective, specify calibration factor of 2. For 50x specify 2.5. With other magnifications, the reticle will need to be custom made.
Cat # Description Pack Price Quote Quantity
Cat #: 67990-16 Description: Kotter Pattern - G48, 16mm Pack: Each Price: $303.00 Add to Quote:
Cat #: 67990-19 Description: Kotter Pattern - G48, 19mm Pack: Each Price: $303.00 Add to Quote:
Cat #: 67990-20.4 Description: Kotter Pattern - G48, 20.4mm Pack: Each Price: $303.00 Add to Quote:
Cat #: 67990-21 Description: Kotter Pattern - G48, 21mm Pack: Each Price: $303.00 Add to Quote:
Cat #: 67990-23 Description: Kotter Pattern - G48, 23mm Pack: Each Price: $303.00 Add to Quote:
Cat #: 67990-24 Description: Kotter Pattern - G48, 24mm Pack: Each Price: $361.50 Add to Quote:
Cat #: 67990-24.5 Description: Kotter Pattern - G48, 24.5mm Pack: Each Price: $361.50 Add to Quote:
Cat #: 67990-25 Description: Kotter Pattern - G48, 25mm Pack: Each Price: $361.50 Add to Quote:
Cat #: 67990-26 Description: Kotter Pattern - G48, 26mm Pack: Each Price: $361.50 Add to Quote:
Cat #: 67990-27 Description: Kotter Pattern - G48, 27mm Pack: Each Price: $361.50 Add to Quote:
Cat #: 67990-50 Description: Kotter Pattern - G48, Custom Pack: Each Price: $408.00 Add to Quote:

G47 Zeiss Integrating Eyepiece Disc 100 Points

Similar to G49 but extended to 100 points which are indexed. Zeiss integrating eyepiece disc. Glass sandwich.
Cat # Description Pack Price Quote Quantity
Cat #: 68094-16 Description: G47 Zeiss Integrating Disc Graticule, 16mm Pack: Each Price: $326.50 Add to Quote:
Cat #: 68094-19 Description: G47 Zeiss Integrating Disc Graticule, 19mm Pack: Each Price: $326.50 Add to Quote:
Cat #: 68094-21 Description: G47 Zeiss Integrating Disc Graticule, 21mm Pack: Each Price: $326.50 Add to Quote:

Zeiss Integrating Disc or Henning Reseau Pattern

Zeiss Integrating Disc or Henning Reseau Pattern eyepiece reticle has 25 points on 6 horizontal lines.
Cat # Description Pack Price Quote Quantity
Cat #: 68093-16 Description: G49 Zeiss Integrating Disc Graticule, 16mm Pack: Each Price: $319.00 Add to Quote:
Cat #: 68093-19 Description: G49 Zeiss Integrating Disc Graticule, 19mm Pack: Each Price: $319.00 Add to Quote:
Cat #: 68093-21 Description: G49 Zeiss Integrating Disc Graticule, 21mm Pack: Each Price: $319.00 Add to Quote:

Integrated EyePiece Simplified Graticule

The eyepiece reticle has a 100 point integrating pattern. It is a slightly simplified version of G47 pattern.
Cat # Description Pack Price Quote Quantity
Cat #: 68005-19 Description: 19mm Integrated Eyepiece (Simplified) G 50, 19mm Pack: Each Price: $282.00 Add to Quote:
Cat #: 68005-21 Description: 21mm Integrated Eyepiece (Simplified) G 50, 21mm Pack: Each Price: $282.00 Add to Quote:
Cat #: 68005-23 Description: 23mm Integrated Eyepiece (Simplified) G 50, 23mm Pack: Each Price: $299.00 Add to Quote:
Cat #: 68005-24 Description: 24mm Integrated Eyepiece (Simplified), G50, 24mm Pack: Each Price: $328.50 Add to Quote:
Cat #: 68005-50 Description: Any Custom Size Integrated Eyepiece (Simplified) G 50, Custom Pack: Each Price: $394.50 Add to Quote:

Mertz Graticule NGM1

To estimate three-dimensional surface areas or surface density where components are not randomly oriented. A test system with parallel curved lines for measuring intersection of points, Mertz for stereology, surf
Cat # Description Pack Price Quote Quantity
Cat #: 68035-16 Description: NGM1 Mertz Graticule, 16mm Pack: Each Price: $284.00 Add to Quote:
Cat #: 68035-19 Description: NGM1 Mertz Graticule, 19mm Pack: Each Price: $284.00 Add to Quote:
Cat #: 68035-21 Description: NGM1 Mertz Graticule, 21mm Pack: Each Price: $284.00 Add to Quote:

Weilbel 1 Graticule NGW1

Consists of 15 lines of equal length connecting the verticals of a regular hexagonal point network. Reference: E.R.Weibel Lab. Invest. Vol. 22 pp 131-152. "Principal and Methods for the Morphometric Study of the Lung and other Organs."
Cat # Description Pack Price Quote Quantity
Cat #: 68022-16 Description: NGW1 Weibel 1 Graticule, 16mm Pack: Each Price: $289.50 Add to Quote:
Cat #: 68022-19 Description: NGW1 Weibel 1 Graticule, 19mm Pack: Each Price: $289.50 Add to Quote:
Cat #: 68022-21 Description: NGW1 Weibel 1 Graticule, 21mm Pack: Each Price: $289.50 Add to Quote:

Weibel 2 Graticule NGW2

Used when making a surface to volume ratio of a structure per mass unit. Consists of a number of short lines with interruptions as long as the lines.
Cat # Description Pack Price Quote Quantity
Cat #: 68025-16 Description: NGW2 Weibel 2 Graticule, 16mm Pack: Each Price: $289.50 Add to Quote:
Cat #: 68025-19 Description: NGW2 Weibel 2 Graticule, 19mm Pack: Each Price: $289.50 Add to Quote:
Cat #: 68025-21 Description: NGW2 Weibel 2 Graticule, 21mm Pack: Each Price: $289.50 Add to Quote:

Weibel 3 Graticule

Weibel Type 3 graticle is used for Stereology. Glass sandwich. Reference: E.R. Weibel, G.S. Kishtler & W.F. Scherle. 1986. J. Cell Biology.30, 23.
Cat # Description Pack Price Quote Quantity
Cat #: 68023-16 Description: NGW3 Weibel 3 Graticule, 16mm Pack: Each Price: $289.50 Add to Quote:
Cat #: 68023-19 Description: NGW3 Weibel 3 Graticule, 19mm Pack: Each Price: $289.50 Add to Quote:
Cat #: 68023-21 Description: NGW3 Weibel 3 Graticule, 21mm Pack: Each Price: $289.50 Add to Quote:

Grain Sizing Reticle

Microscope graticle for the determination of grain size of non-metallic inclusions content of steel. Scaled for use with 10x objective magnification.
Cat # Description Pack Price Quote Quantity
Cat #: 68007-21 Description: NGE60 Grain Sizing Reticle To En 10247, 21mm Pack: Each Price: $305.50 Add to Quote:
Cat #: 68007-23 Description: NGE60 Grain Sizing Reticle To En 10247, 23mm Pack: Each Price: $305.50 Add to Quote:
Cat #: 68007-24 Description: NGE60 Grain Sizing Reticle To En 10247, 24.5mm Pack: Each Price: $357.00 Add to Quote:
Cat #: 68007-25 Description: NGE60 Grain Sizing Reticle To En 10247, 25mm Pack: Each Price: $357.00 Add to Quote:
Cat #: 68007-26 Description: NGE60 Grain Sizing Reticle To En 10247, 26mm Pack: Each Price: $357.00 Add to Quote:
Cat #: 68007-27 Description: NGE60 Grain Sizing Reticle To En 10247, 27mm Pack: Each Price: $357.00 Add to Quote:
Cat #: 68007-50 Description: NGE60 Grain Sizing Reticle To En 10247, Custom Pack: Each Price: $398.50 Add to Quote:
Cat #: 68036-21 Description: NGE61 Grain Sizing Reticle To Iso 4967, 21mm Pack: Each Price: $305.50 Add to Quote:
Cat #: 68036-23 Description: NGE61 Grain Sizing Reticle To Iso 4967, 23mm Pack: Each Price: $305.50 Add to Quote:
Cat #: 68036-24 Description: NGE61 Grain Sizing Reticle To Iso 4967, 24.5mm Pack: Each Price: $352.00 Add to Quote:
Cat #: 68036-25 Description: NGE61 Grain Sizing Reticle To Iso 4967, 25mm Pack: Each Price: $352.00 Add to Quote:
Cat #: 68036-26 Description: NGE61 Grain Sizing Reticle To Iso 4967, 26mm Pack: Each Price: $352.00 Add to Quote:
Cat #: 68036-27 Description: NGE61 Grain Sizing Reticle To Iso 4967, 27mm Pack: Each Price: $352.00 Add to Quote:
Cat #: 68036-50 Description: NGE61 Grain Sizing Reticle To Iso 4967, Custom Pack: Each Price: $396.50 Add to Quote: