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Tele Vue Panoptic 41mm 68° Eyepiece - 2"
The Tele Vue Panoptic 41mm represents the physical limit of the 2-inch barrel format, delivering a massive 46mm field stop for expansive, low-power vistas. Designed for long-focal length instruments, it frames entire star complexes like the North American Nebula (NGC 7000) with a dark sky background and high image contrast. This six-element optic balances a wide 68° field with long eye relief, making it the primary choice for deep-sky scanning and large-scale celestial framing.
46mm Field Stop and Wide-Field Navigation
By utilizing every millimeter of the 2-inch barrel's inner diameter, this eyepiece provides the maximum possible true field of view before vignetting occurs. In a 2000mm focal length SCT, it produces 49x magnification and a 1.3° field, allowing the Hercules Cluster (M13) to be centered with significant surrounding context for a balanced, natural perspective. The optical geometry is calculated to maintain pinpoint stars across the entire 68° span, preventing the edge-of-field astigmatism common in simpler wide-angle designs.
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Astigmatism Control: The sophisticated lens grouping tends to flatten the field in f/7 and slower refractors, ensuring stars do not "smear" near the field stop.
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27mm Eye Relief: This generous distance allows observers to see the entire field stop comfortably while wearing eyeglasses, avoiding the need to "peek" around the edges.
Handling and Ergonomics
The 41mm Panoptic features a scalloped rubber grip that remains secure even with gloves, making it easy to handle during cold observing sessions. The adjustable screw-type eyeguard allows you to set a fixed eye position, effectively locking in the full 27mm eye relief and eliminating guesswork. Its solid, well-balanced housing provides confidence when swapping eyepieces, especially on heavier 2-inch diagonals where stability matters.
Operational Comparison and Balance
The 41mm Panoptic is often compared to higher-magnification wide-fields or longer-focal length Plössls, each presenting specific mechanical trade-offs.
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vs. Tele Vue 31mm Nagler: While the 31mm offers an 82° field, the 41mm Panoptic weighs only 2.1 lbs, reducing the need for re-balancing counterweights on smaller EQ mounts when switching eyepieces.
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vs. Tele Vue 55mm Plössl: Both capture the same 46mm true field, but the 41mm Panoptic increases magnification by 34%, which darkens the sky background to reveal fainter nebulosity in light-polluted areas.
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Will the Tele Vue Panoptic 41mm work with my f/4.5 Newtonian?
In an f/4.5 system, the 41mm Panoptic produces a 9.1mm exit pupil, which likely exceeds the observer's pupil diameter and results in wasted light; furthermore, the secondary mirror shadow may become visible as a dark spot in the center of the field.
Can I wear eyeglasses while using the Tele Vue Panoptic 41mm?
Yes, the 27mm eye relief is ample for observers wearing thick glasses to correct for astigmatism, and the adjustable rubber eyeguard can be positioned to maintain the correct eye distance.
How do I prevent blackouts or kidney-beaning with this eyepiece?
The long eye relief of the Tele Vue Panoptic 41mm requires precise eye positioning; using the adjustable eyeguard or a Tele Vue Eyeguard Extender helps lock in the optimal head position for a stable view.
Does the Tele Vue Panoptic 41mm show more sky than the 55mm Plössl?
No, both eyepieces share the same 46mm field stop, which is the physical limit of the 2-inch barrel format, meaning they capture the same true field of view despite different magnifications.
Is the Tele Vue Panoptic 41mm compatible with Dioptrx?
Yes, like most long eye relief Tele Vue eyepieces, the 41mm Panoptic is compatible with Dioptrx astigmatism correctors, allowing for sharp views without wearing eyeglasses.
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| Model # |
EPO-41.0 |
| Focal Length |
41 mm |
| Barrel Size |
2" |
| Apparent Field of View |
68° |
| Eye Relief |
27 mm |
| Field Stop Diameter |
46 mm |
| Weight |
33.1 oz (2.07 lb) |
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41mm Panoptic Eyepiece
× 1
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TeleVue 5-Year Limited Warranty
