Explore Scientific 52° Series 20mm Waterproof Eyepiece EPWP5220-01
Achieves superior light transmission sharp contrast, high resolution and crisp definition! Item Number: EPWP5220-01 Focal Length: 20mm Weight: 6.4oz
PRICE 119.95 SKU EPWP5220-01 BARCODE 811803030053 Explore Scientific 52° Series 20mm Waterproof Eyepiece EPWP5220-01
Features and Benefits
- Great Contrast
- Perfect For Astronomy
- Flat-Field Multi-Element
- Limited One Year Warranty
Description
Explore Scientific Waterproof Eyepieces - Comfort, Quality, Value. The Explore Scientific 52° Series eyepieces are excellent flat-field multi-element oculars that can transform your visual astronomy experience. With an apparent field of view of 52 degrees, these eyepieces offer incredible value in a very nice eyepiece. Expect exceptional quality and value versus a comparably priced Plossl.
Often considered the perfect mid-range focal length for most amateur telescopes, the 20mm on the ED127 at f7.5 produces a 1 degree true field of view. Perfect for the Messier Marathon, or running down the Herschel Catalog. The 20mm 52° Series is also a good selection for most bino viewers with its relatively small size and magnification range.
Another great benefit of these eyepieces is the excellent contrast and ease with which you can gaze, not directly at an object, but slightly to either side. This skill, called using averted vision, is especially helpful when observing faint objects, because using averted vision puts the image on a part of your eye that is more sensitive to light, allowing you to see fainter images.
Specifications
| Item Number |
EPWP5220–01 |
| Focal Length |
20mm |
| Length |
71mm |
| Width |
43mm |
| Weight |
181.4 grams; 6.4 oz. |
| Barrel Size/Type |
1.25" O.D. / Double Taper |
| Eye Relief |
15mm |
| Field Stop Diameter: |
18.2mm |
| Coatings: |
EMD (Enhanced Multi-Layer Deposition) on all lens-to-air surfaces |
| Lens Elements/ Groups |
5 Elements in 3 Groups; Edge Blackened |
| Filter Thread |
Fits Standard 1.25-inch Dia. Thread in Filters (1.125-inches x 42 TPI) |
| Waterproof |
O-Ring Sealed Argon Gas Purged; Tested Under 1 Meter of Water for 30 Minutes |
| Eyecup |
Removable Flip-Down Style Soft Silicone Rubber |
| Lens Caps |
Slide-on Top and Bottom |
| Materials |
Optical Glass; Aluminum; Steel; Silicone Rubber |
| Markings |
Laser Engraved: Focal Length; Series; Serial Number; Brand |
