Nagler-Petzval: flat field without a flattener
The TeleVue NP-101is is a premium apochromat for demanding astrophotographers and experienced observers. The four-lens Nagler-Petzval design in two ED groups delivers a flat, almost completely chromatic aberration-free image field at 101mm aperture and 540mm focal length (f/5.3), without a separate field flattener.
Imaging System Execution
This is the photographically optimized version: the high-quality fine-focus focuser is motor-ready for the focusing accuracy required by high-resolution photography. Stars remain sharp to the edge, even on larger sensors. Visually, the tube delivers razor-sharp images of the Moon and planets, as well as wide, high-contrast star fields. A magnification of up to approximately 200x is realistically meaningful.
In the box
- Optical tube NP-101 is a 101/540 Nagler-Petzval quadruplet
- Imaging System - focuser, prepared for motorization
- Tube Rings
- Transport case
Featured accessories
The TeleVue PMT-4201 T-Ring Adapter (99 euro) connects your camera directly to the Imaging System rear.
For whom yes, for whom no
For astrophotographers who want a corrected Petzval field with TeleVue mechanics, also excellent visually. Not for those seeking maximum aperture; the NP127is offers the same concept with 127 mm.
Specifications
| Optical design | Nagler-Petzval quadruplet, two ED groups |
| Opening | 101 mm |
| Focal length | 540 mm |
| Opening ratio | f/5.3 |
| Focuser | Imaging System, prepared for motorization |
| Field of view | Train, without loose flatterer |
| Execution | OTA (loose tube) |
Are you unsure about the right tube for your needs? The telescope selection aid helps you choose. Also view all Refracting telescopes and the full range of TeleVue.
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