Negative cylinders have one flat surface and one concave surface and have a negative focal length.
Below are our standard negative cylinder specifications.
Don't see what you need? Request custom optics.
| Lens Type | Negative Cylinder | Length Tolerance | ± 0.10 mm | |||
| Glass Type | N-BK7 | Width Tolerance | ± 0.14 mm | |||
| Dimension Unit | mm | Center Thickness | ± 0.50 mm | |||
| Focal Length | ± 2% | Surface Quality | 60-40 | |||
| Surface Accuracy | Y-Direction X-Direction |
1/2 Wave | Centration | < 3 arc minutes | ||
| 1/2 Wave per 25 mm | Clear Aperture | 90% | ||||
| Flat Annulus | 0.50 +0 / -0.40 | |||||
| Coating | Uncoated, Specify your coating (See Coating Chart for Available Options) | |||||
| * All dimensions are in mm | ||||||
| Part Number | X (Length) | Y (Width) | EFL | BFL | CT | ET | |
|---|---|---|---|---|---|---|---|
| L-PCN044 | 60 | 50 | -300 | -306 | 7.5 | 9.5 | Add to Quote |
| L-PCN041 | 60 | 50 | -250 | -255.4 | 7 | 9.4 | Add to Quote |
| L-PCN038 | 60 | 51 | -200 | -205 | 6.5 | 9.6 | Add to Quote |
| L-PCN035 | 60 | 51 | -150 | -154 | 5.4 | 9.5 | Add to Quote |
| L-PCN031 | 60 | 51 | -100 | -102.3 | 3 | 9.4 | Add to Quote |
| L-PCN026 | 60 | 31 | -80 | -82.3 | 3.2 | 6 | Add to Quote |
| L-PCN021 | 60 | 21 | -60 | -63.1 | 4.4 | 6.1 | Add to Quote |
| L-PCN017 | 60 | 16 | -40 | -43.1 | 4.6 | 6 | Add to Quote |
| L-PCN013 | 60 | 16 | -25.4 | -27.9 | 3.7 | 6 | Add to Quote |
| L-PCN009 | 25 | 16 | -19 | -21.4 | 3.6 | 7.1 | Add to Quote |
| L-PCN005 | 25 | 13 | -12.7 | -14.85 | 3.2 | 7.1 | Add to Quote |
| L-PCN001 | 25 | 7 | -6.35 | -8.35 | 3.1 | 5.1 | Add to Quote |
1410 Gail Borden Place, A3, El Paso, TX 79935
1-915-595-5417
Ross Optical is a division of Precision Optics. Visit Precision Optics and our sister company Lighthouse Imaging.
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