Agena 1.25" Wireless Illuminated Reticle Eyepiece with Focusable Dual Crosshair - 20mm
Stock count is accurate & shown in real time.
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available (account login required).
- This item is out of stock.
- Sign up for back-in-stock alerts to be notified when this item becomes available (account login required).
Contiguous US / Lower 48:
Free shipping applies to orders over $50 using our chosen carrier/method. Faster paid options are available at checkout.
Alaska, Hawaii & US Territories:
Free shipping applies to many—but not all—products. Enter your ZIP code in cart or upon checkout to confirm options and costs.
International:
International orders do not qualify for free shipping. Shipping, duties, brokerage, tariffs, and taxes are the customer’s responsibility. Some items may be restricted due to export, size, or manufacturer limitations.
- Premium quality, 20mm 1.25" centering / alignment / tracking eyepiece
- 5 lens elements in 4 groups with blackened lens edges provide bright views with a wide 70° apparent field of view
- Comfortable 16mm eye relief
- Wireless LED-illuminated reticle has adjustable focus and brightness
- Dual crosshairs are focusable - great if you wear glasses
- Excellent for accurate polar alignment, goto alignment, and centering guide stars for astrophotography
- Illuminator requires SR-54 / LR-44 batteries (included)
An illuminated reticle eyepiece is virtually indispensable for serious astronomy observing and astrophotography. The Agena 20mm illuminated reticle Plossl eyepiece boasts a double line crosshair laser etched into optical glass that extends from edge to edge. It greatly simplifies centering celestial objects in the eyepiece for more accurate go-to alignments. The illumination is variable, allowing the observer to adjust it for current conditions. It can also be turned off when not needed.
Unlike single line crosshairs in other illuminated reticle eyepieces, the double line design doesn't obscure small targets when attempting to center them – they remain visible in the small box created by the intersection of the two pairs of double lines. Alignment can also be achieved by putting the object at the intersection of any two perpendicular lines. The reticle can be rotated and facilitates polar drift alignment routines for equatorial mounts and precision guiding for astrophotography. Eyeglass wearers will appreciate the focusing mechanism that allows them to bring the reticle to a sharp focus.
The 20mm focal length provides a wide 70° apparent view of the sky allowing you to find objects and alignment stars more easily than shorter focal length eyepieces, while maintaining good eye relief, especially when compared with other higher-power reticle eyepieces (just use a barlow with this eyepiece if you want even more magnification/accuracy). With the illuminator turned off, the eyepiece can be used like any other eyepiece for comfortable observing. Weight = 7.8oz.
Please note: This eyepiece was deliberately designed with a large center box compared to what you might be accustomed to with most other reticle eyepieces. This was based on requests from many customers who primarily wanted an alignment eyepiece that was easier to use, without excessive squinting and straining. Others who want to use this eyepiece for critical tracking can simply defocus a star to where it occupies the center box, and its tracking/guiding will be just as accurate as using a smaller star image with a smaller central crosshair box.
Other Information
- Country of Manufacture: China
An illuminated reticle eyepiece is virtually indispensable for serious astronomy observing and astrophotography. The Agena 20mm illuminated reticle Plossl eyepiece boasts a double line crosshair laser etched into optical glass that extends from edge to edge. It greatly simplifies centering celestial objects in the eyepiece for more accurate go-to alignments. The illumination is variable, allowing the observer to adjust it for current conditions. It can also be turned off when not needed.
Unlike single line crosshairs in other illuminated reticle eyepieces, the double line design doesn't obscure small targets when attempting to center them – they remain visible in the small box created by the intersection of the two pairs of double lines. Alignment can also be achieved by putting the object at the intersection of any two perpendicular lines. The reticle can be rotated and facilitates polar drift alignment routines for equatorial mounts and precision guiding for astrophotography. Eyeglass wearers will appreciate the focusing mechanism that allows them to bring the reticle to a sharp focus.
The 20mm focal length provides a wide 70° apparent view of the sky allowing you to find objects and alignment stars more easily than shorter focal length eyepieces, while maintaining good eye relief, especially when compared with other higher-power reticle eyepieces (just use a barlow with this eyepiece if you want even more magnification/accuracy). With the illuminator turned off, the eyepiece can be used like any other eyepiece for comfortable observing. Weight = 7.8oz.
Please note: This eyepiece was deliberately designed with a large center box compared to what you might be accustomed to with most other reticle eyepieces. This was based on requests from many customers who primarily wanted an alignment eyepiece that was easier to use, without excessive squinting and straining. Others who want to use this eyepiece for critical tracking can simply defocus a star to where it occupies the center box, and its tracking/guiding will be just as accurate as using a smaller star image with a smaller central crosshair box.
| Manufacturer | Agena Astro |
|---|---|
| Eyepiece Series | SWA (Super Wide Angle) |
| Focal Length | 20mm |
| Barrel Size | 1.25" (31.7mm) |
| Apparent Field of View (Mfg Specified) | 70° |
| Eye Relief (Designed) | 16mm |
| Filter Threads | Standard 1.25" Filter Thread (M28.5 x 0.6) |
| Coatings | Fully Broadband Multi-Coated |
| Lens Elements | 5 |
| Lens Groups | 4 |
| Blackened Lens Edges | Yes |
| Barrel Type | With safety undercut |
| Protective Storage Container Included | No |
| Height (With Eyeguard Extended) | 81mm |
| Maximum Width | 54mm |
| End Caps | 2 |
| Rubber Eye Guard | Yes |
- Premium quality, 20mm 1.25" centering / alignment / tracking eyepiece
- 5 lens elements in 4 groups with blackened lens edges provide bright views with a wide 70° apparent field of view
- Comfortable 16mm eye relief
- Wireless LED-illuminated reticle has adjustable focus and brightness
- Dual crosshairs are focusable - great if you wear glasses
- Excellent for accurate polar alignment, goto alignment, and centering guide stars for astrophotography
- Illuminator requires SR-54 / LR-44 batteries (included)
An illuminated reticle eyepiece is virtually indispensable for serious astronomy observing and astrophotography. The Agena 20mm illuminated reticle Plossl eyepiece boasts a double line crosshair laser etched into optical glass that extends from edge to edge. It greatly simplifies centering celestial objects in the eyepiece for more accurate go-to alignments. The illumination is variable, allowing the observer to adjust it for current conditions. It can also be turned off when not needed.
Unlike single line crosshairs in other illuminated reticle eyepieces, the double line design doesn't obscure small targets when attempting to center them – they remain visible in the small box created by the intersection of the two pairs of double lines. Alignment can also be achieved by putting the object at the intersection of any two perpendicular lines. The reticle can be rotated and facilitates polar drift alignment routines for equatorial mounts and precision guiding for astrophotography. Eyeglass wearers will appreciate the focusing mechanism that allows them to bring the reticle to a sharp focus.
The 20mm focal length provides a wide 70° apparent view of the sky allowing you to find objects and alignment stars more easily than shorter focal length eyepieces, while maintaining good eye relief, especially when compared with other higher-power reticle eyepieces (just use a barlow with this eyepiece if you want even more magnification/accuracy). With the illuminator turned off, the eyepiece can be used like any other eyepiece for comfortable observing. Weight = 7.8oz.
Please note: This eyepiece was deliberately designed with a large center box compared to what you might be accustomed to with most other reticle eyepieces. This was based on requests from many customers who primarily wanted an alignment eyepiece that was easier to use, without excessive squinting and straining. Others who want to use this eyepiece for critical tracking can simply defocus a star to where it occupies the center box, and its tracking/guiding will be just as accurate as using a smaller star image with a smaller central crosshair box.
Other Information
- Country of Manufacture: China
| Manufacturer | Agena Astro |
|---|---|
| Eyepiece Series | SWA (Super Wide Angle) |
| Focal Length | 20mm |
| Barrel Size | 1.25" (31.7mm) |
| Apparent Field of View (Mfg Specified) | 70° |
| Eye Relief (Designed) | 16mm |
| Filter Threads | Standard 1.25" Filter Thread (M28.5 x 0.6) |
| Coatings | Fully Broadband Multi-Coated |
| Lens Elements | 5 |
| Lens Groups | 4 |
| Blackened Lens Edges | Yes |
| Barrel Type | With safety undercut |
| Protective Storage Container Included | No |
| Height (With Eyeguard Extended) | 81mm |
| Maximum Width | 54mm |
| End Caps | 2 |
| Rubber Eye Guard | Yes |
Agena 1.25" Wireless Illuminated Reticle Eyepiece with Focusable Dual Crosshair - 20mm