| Model | NTX-1A | NTX-1B | NTX-1C | ||
| Head | Straight Binocular Viewing Head | ● | ● | ● | |
| Eyepiece | WF5× | ○ | ○ | ○ | |
| WF10× | ● | ● | ● | ||
| WF15× | ○ | ○ | ○ | ||
| WF20× | ○ | ○ | ○ | ||
| Objective | Inserted Objective | 1× | ○ | ○ | ○ |
| 2× | ● | ● | ● | ||
| 3× | ○ | ○ | ○ | ||
| 4× | ○ | ○ | ○ | ||
| 6× | ○ | ○ | ○ | ||
| Working Distance | 80mm | ● | ● | ● | |
| Illumination | No Light | ● | |||
| Epi-illumination 12V/ 10W | ● | ● | |||
| Diascopic Illumination 12V/ 10W | ● | ||||
| Model | NTX-2A | NTX-2B | NTX-2C | NTX-3A | NTX-3B | NTX-3C | ||
| Head | Inclined Binocular Viewing Head, Unrotatable | ● | ● | ● | ● | ● | ● | |
| Eyepiece | WF5× | ○ | ○ | ○ | ○ | ○ | ○ | |
| WF10× | ● | ● | ● | ● | ● | ● | ||
| WF15× | ○ | ○ | ○ | ○ | ○ | ○ | ||
| WF20× | ○ | ○ | ○ | ○ | ○ | ○ | ||
| Objective | Inserted Objective | 1× | ○ | ○ | ○ | |||
| 2× | ● | ● | ● | |||||
| 3× | ○ | ○ | ○ | |||||
| 4× | ○ | ○ | ○ | |||||
| 6× | ○ | ○ | ○ | |||||
| Objective | 2×、4× | ● | ● | ● | ||||
| 1×、2× | ○ | ○ | ○ | |||||
| 1×、3× | ○ | ○ | ○ | |||||
| Working Distance | 80mm | ● | ● | ● | ||||
| 57mm | ● | ● | ● | |||||
| Illumination | No Light | ● | ● | |||||
| Transmitted light 6V/ 12W | ● | ● | ● | ● | ||||
| Incident light 6V/ 12W | ● | ● | ||||||
| Model | NTX-5A | NTX-5B | NTX-5C | NTX-6C-W | ||
| Head | Inclined Binocular Head, 360° Rotatable | ● | ● | ● | ● | |
| Eyepiece | WF5× | ○ | ○ | ○ | ○ | |
| WF10× | ● | ● | ● | ● | ||
| WF15× | ○ | ○ | ○ | ○ | ||
| WF20× | ○ | ○ | ○ | ○ | ||
| Objective | Inserted Objective | 2×、4× | ● | ● | ● | ● |
| 1×、2× | ○ | ○ | ○ | ○ | ||
| 1×、3× | ○ | ○ | ○ | ○ | ||
| Working Distance | 76mm | ● | ● | ● | ● | |
| Illumination | No Light | ● | ||||
| Epi-illumination 12V/ 10W | ● | ● | ● | |||
| Diascopic Illumination 12V/ 10W | ● | ● | ||||
| Model | NTX-10 | NTX-20 | ||
| Head | Inclined Binocular Head | ● | ● | |
| Eyepiece | WF5× | ○ | ○ | |
| WF10× | ● | ● | ||
| WF15× | ○ | ○ | ||
| WF20× | ○ | ○ | ||
| Objective | Objective | 2× & 4× | ● | ● |
| 1× & 2× | ○ | ○ | ||
| 1× & 3× | ○ | ○ | ||
| Auxiliary Objective | 0.5× | ○ | ○ | |
| 0.75× | ○ | ○ | ||
| 1.5× | ○ | ○ | ||
| 2× | ○ | ○ | ||
| Working Distance | 72mm | ● | ● | |
| Illumination | No Light | ● | ||
| Epi-illumination 6V/ 12W | ● | |||
| Diascopic Illumination 6V/ 12W | ● | |||
| Model | NTX-L | ||
| Head | Inclined Binocular Head | ● | |
| Eyepiece | WF5× | ○ | |
| WF10× | ● | ||
| WF15× | ○ | ||
| WF20× | ○ | ||
| Objective | Inserted Objective | 1× | ● |
| 0.5× | ○ | ||
| Working Distance | 230mm (Inserted Objective 1×) | ● | |
| 250mm (Inserted Objective 0.5×) | ○ | ||
| Illumination | Incandescent Lamp 12V/ 10W | ● | |