12.5x精密变倍镜头应用范围广泛可用在生物、半导体、通讯等场合。镜头结构采用大数值孔径的光路设计，分辨率高，最大可用２／３”的SENSOR.
本光学系统需要TV 套管,，手动上变焦组件和下变焦组件。也可在下变焦组件上加一个辅助镜头来调整工作距离和视场。大倍率检查，12.5倍的精密变焦镜头可以和Mitutoyo以及Nikon镜头兼容（使用适配器）.
同轴下变焦组件包括同轴调焦模块，同轴连接件，40”光纤照明器件和光纤连接器。可选环形光适配器(#89-922)，在某些情况下不能使用同轴光照明时可采用内置照明。在一些测量、检验的场合需要十字线发生附件(#59-682)移动附加的电子元件.这种分划板投影头兼容所有直径是21mm的透射式分划板.
| Item | Stock No. | |
| One Required | 1.5X TV Tube | #56-625 |
| 2.0X TV Tube | #56-626 | |
| Required | Manual Upper Zoom Module | #59-671 |
| One Required | Fine Focus Lower Module | #59-672 |
| Coaxial Module Kit | #59-756 | |
| Optional | 0.25X Auxiliary Lens | #59-677 |
| 0.50X Auxiliary Lens | #59-678 | |
| 0.75X Auxiliary Lens | #59-679 | |
| 1.5X Auxiliary Lens | #59-680 | |
| 2.0X Auxiliary Lens | #59-681 | |
| Mitutoyo Objective Adapter | #59-675 | |
| Nikon Objective Adapter | #59-676 | |
| Ring Light Guide Adapter | #89-922 | |
| 1.0x Reticle Projector | #59-682 | |
| Mounting Clamp | #59-683 | |
| 0.629" ID, Fiber Optic Light Guide Adapter | #38-947 | |
| Auxilary Lens | Specifications | Non-Coaxial Illumination | Coaxial Illumination | ||||||
1.5X | 2.0X | 1.5X | 2.0X | ||||||
| Low | High | Low | High | Low | High | Low | High | ||
| 0.18X† 468mm WD | NA | 0.0035 | 0.015 | 0.0035 | 0.015 | – | – | – | – |
| MAG | 0.14 | 1.8 | 0.19 | 2.3 | – | – | – | – | |
| FOV* | 45.6mm | 3.65mm | 34.2mm | 2.7mm | – | – | – | – | |
| 0.25X 310mm WD | NA | 0.0048 | 0.025 | 0.0048 | 0.025 | – | – | – | – |
| MAG | 0.20 | 2.4 | 0.26 | 3.3 | – | – | – | – | |
| FOV* | 32.8mm | 2.6mm | 24.6mm | 1.97mm | – | – | – | – | |
| 0.50X 178mm WD | NA | 0.010 | 0.050 | 0.010 | 0.050 | 0.010 | 0.050 | 0.010 | 0.050 |
| MAG | 0.39 | 4.9 | 0.52 | 6.5 | 0.39 | 4.9 | 0.52 | 6.5 | |
| FOV* | 16.4mm | 1.3mm | 12.3mm | 0.98mm | 16.4mm | 1.3mm | 12.3mm | 0.98mm | |
| 0.75X 114mm WD | NA | 0.014 | 0.075 | 0.014 | 0.075 | 0.014 | 0.075 | 0.014 | 0.075 |
| MAG | 0.59 | 7.3 | 0.78 | 9.8 | 0.59 | 7.3 | 0.78 | 9.8 | |
| FOV* | 10.9mm | 0.88mm | 8.2mm | 0.66mm | 10.9mm | 0.88mm | 8.2mm | 0.66mm | |
| 1.00X (No Aux) 89mm WD | NA | 0.019 | 0.10 | 0.019 | 0.10 | 0.019 | 0.10 | 0.019 | 0.10 |
| MAG | 0.78 | 9.8 | 1.0 | 13.0 | 0.78 | 9.8 | 1.0 | 13.0 | |
| FOV* | 8.21mm | 0.66mm | 6.4mm | 0.49mm | 8.21mm | 0.66mm | 6.4mm | 0.49mm | |
| 1.5X 52mm WD | NA | 0.029 | 0.15 | 0.029 | 0.15 | 0.029 | 0.15 | 0.029 | 0.15 |
| MAG | 1.17 | 14.6 | 1.6 | 19.5 | 1.17 | 14.6 | 1.6 | 19.5 | |
| FOV* | 5.47mm | 0.44mm | 4.10mm | 0.33mm | 5.47mm | 0.44mm | 4.10mm | 0.33mm | |
| 2.0X 32mm WD | NA | 0.038 | 0.20 | 0.038 | 0.20 | 0.039 | 0.20 | 0.038 | 0.20 |
| MAG | 1.6 | 19.5 | 2.1 | 26.0 | 1.6 | 19.5 | 2.1 | 26.0 | |
| FOV* | 4.1mm | 0.33mm | 3.0mm | 0.25mm | 4.1mm | 0.33mm | 3.0mm | 0.25mm | |
*Horizontal FOV based on ½" Sensor
†Based on #59-677 Auxiliary Lens at 460mm WD