Long Perng 1.25" 80º Wide Angle Lanthanum Eyepiece - 4mm
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- Wide-field 4mm focal length with an 80-degree apparent field of view for immersive and panoramic views of the night sky
- Includes a high-index and low-dispersion lanthanum glass element to minimize chromatic aberration and improve image color
- Long 20mm eye relief and large 30.5mm eye lens for a comfortable viewing experience
- Rubber-coated aluminum body with 1.25" tapered barrel and fully multi-coated optics
The Long Perng 4mm 80-degree Lanthanum eyepiece delivers an immersive and panoramic visual observing experience. With 8 elements in 5 groups including a premium lanthanum glass element, this ocular offers an wide and flat field of view along with superb correction of chromatic and spherical aberration. All glass in this eyepiece is fully multi-coated to ensure you enjoy high contrast, image clarity, and natural color rendering. It’s ideal for high-magnification deep-sky observing and is suitable for planetary and lunar observing as well.
This wide-angle lanthanum eyepiece features a long 20mm eye relief, large enough even if you wear eyeglasses while observing. And with a large 30.5mm-diameter eye lens, it’s easy and enjoyable to use this eyepiece with minimal eye strain during long observing sessions. The attractive red-and-black housing is made of aluminum coated with rubber to make it easy and comfortable to handle. It also features a tapered barrel to minimize the chance of slippage when not completely secure in the focuser.
Note: The barrel of the 1.25” Long Perng Wide Angle Lanthanum eyepieces are threaded for M28.6x0.6 filters sold by Orion – in most cases, they should be compatible with standard 1.25” filter threads from other manufacturers. The 2” version of these eyepieces are threaded for M48x0.6 and will only accept Orion 2” filters - they will NOT accept most other 2” filters on the market.
Other Information
- Country of Manufacture: Taiwan
The Long Perng 4mm 80-degree Lanthanum eyepiece delivers an immersive and panoramic visual observing experience. With 8 elements in 5 groups including a premium lanthanum glass element, this ocular offers an wide and flat field of view along with superb correction of chromatic and spherical aberration. All glass in this eyepiece is fully multi-coated to ensure you enjoy high contrast, image clarity, and natural color rendering. It’s ideal for high-magnification deep-sky observing and is suitable for planetary and lunar observing as well.
This wide-angle lanthanum eyepiece features a long 20mm eye relief, large enough even if you wear eyeglasses while observing. And with a large 30.5mm-diameter eye lens, it’s easy and enjoyable to use this eyepiece with minimal eye strain during long observing sessions. The attractive red-and-black housing is made of aluminum coated with rubber to make it easy and comfortable to handle. It also features a tapered barrel to minimize the chance of slippage when not completely secure in the focuser.
Note: The barrel of the 1.25” Long Perng Wide Angle Lanthanum eyepieces are threaded for M28.6x0.6 filters sold by Orion – in most cases, they should be compatible with standard 1.25” filter threads from other manufacturers. The 2” version of these eyepieces are threaded for M48x0.6 and will only accept Orion 2” filters - they will NOT accept most other 2” filters on the market.
| Manufacturer | Long Perng |
|---|---|
| Eyepiece Series | 80º Wide Angle Lanthanum |
| Focal Length | 4mm |
| Barrel Size | 1.25" (31.7mm) |
| Apparent Field of View (Mfg Specified) | 80° |
| Eye Relief (Designed) | 20mm |
| Filter Threads | 1.25" Filter Thread (M28.6 x 0.6) |
| Coatings | Fully Multi-Coated |
| Lens Elements | 8 |
| Lens Groups | 5 |
| Blackened Lens Edges | Yes |
| Protective Storage Container Included | Yes - Manufacturer Supplied |
| Protective Plastic Storage Container Size (Sold Separately) | Replacement: Agena 65x120mm |
| Height (With Eyeguard Extended) | 165mm |
| Maximum Width | 60.2mm |
| Eye Lens Diameter | 30.5mm |
| Field Stop Diameter | 33.4mm |
| Rubber Eye Guard | Yes |
| Weight | 544 g / 19.2 oz |
| Misc. Information |
|
- Wide-field 4mm focal length with an 80-degree apparent field of view for immersive and panoramic views of the night sky
- Includes a high-index and low-dispersion lanthanum glass element to minimize chromatic aberration and improve image color
- Long 20mm eye relief and large 30.5mm eye lens for a comfortable viewing experience
- Rubber-coated aluminum body with 1.25" tapered barrel and fully multi-coated optics
The Long Perng 4mm 80-degree Lanthanum eyepiece delivers an immersive and panoramic visual observing experience. With 8 elements in 5 groups including a premium lanthanum glass element, this ocular offers an wide and flat field of view along with superb correction of chromatic and spherical aberration. All glass in this eyepiece is fully multi-coated to ensure you enjoy high contrast, image clarity, and natural color rendering. It’s ideal for high-magnification deep-sky observing and is suitable for planetary and lunar observing as well.
This wide-angle lanthanum eyepiece features a long 20mm eye relief, large enough even if you wear eyeglasses while observing. And with a large 30.5mm-diameter eye lens, it’s easy and enjoyable to use this eyepiece with minimal eye strain during long observing sessions. The attractive red-and-black housing is made of aluminum coated with rubber to make it easy and comfortable to handle. It also features a tapered barrel to minimize the chance of slippage when not completely secure in the focuser.
Note: The barrel of the 1.25” Long Perng Wide Angle Lanthanum eyepieces are threaded for M28.6x0.6 filters sold by Orion – in most cases, they should be compatible with standard 1.25” filter threads from other manufacturers. The 2” version of these eyepieces are threaded for M48x0.6 and will only accept Orion 2” filters - they will NOT accept most other 2” filters on the market.
Other Information
- Country of Manufacture: Taiwan
| Manufacturer | Long Perng |
|---|---|
| Eyepiece Series | 80º Wide Angle Lanthanum |
| Focal Length | 4mm |
| Barrel Size | 1.25" (31.7mm) |
| Apparent Field of View (Mfg Specified) | 80° |
| Eye Relief (Designed) | 20mm |
| Filter Threads | 1.25" Filter Thread (M28.6 x 0.6) |
| Coatings | Fully Multi-Coated |
| Lens Elements | 8 |
| Lens Groups | 5 |
| Blackened Lens Edges | Yes |
| Protective Storage Container Included | Yes - Manufacturer Supplied |
| Protective Plastic Storage Container Size (Sold Separately) | Replacement: Agena 65x120mm |
| Height (With Eyeguard Extended) | 165mm |
| Maximum Width | 60.2mm |
| Eye Lens Diameter | 30.5mm |
| Field Stop Diameter | 33.4mm |
| Rubber Eye Guard | Yes |
| Weight | 544 g / 19.2 oz |
| Misc. Information |
|