Masuyama 2" Eyepiece with 53° AFOV - 45mm # MOP-45

Our Price: $395.00
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In stock (4 Available)
Ships by Next Business Day
Our Product ID: E-MA-MOP-45
Manufacturer SKU: MOP-45
Item Can Ship: Worldwide
Masuyama 2" Eyepiece - 45mm # MOP-45

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  • Masuyama 2" Eyepiece - 45mm # MOP-45

Website Special - FREE Agena plastic bolt case / storage container included with this eyepiece (a $9.50 value)!

Product Details

Ultra-premium Masuyama eyepieces were offered briefly in the mid-1980s before going out of production a few years later. Since then, these legendary eyepieces have only been available - fleetingly - on the resale market. Now, after nearly 30 years, Masuyama eyepieces are back in production and updated with modern glass and multi-coating technology.

Coveted for their clean, high-contrast views on velvet-black backgrounds, Masuyama eyepieces incorporate a five-element "hybrid Plossl" design. They have much better performance towards the edge of the field and improved color performance compared to Plossls and other competing designs. Masuyama eyepieces achieve high contrast through a much smoother polish than nearly all premium eyepieces and through superior internal baffling in their long bodies.

The eyepieces are the signature design of the renowned optician Dr. Masuyama who designed many of the finest Japanese eyepieces of the 1960s and 1970s. Dr. Masuyama even designed the 100 mm focal-length eyepiece used for visual observing at the historic 60" telescope at Mount Wilson Observatory in California.

This 45mm focal-length Masuyama eyepiece with 2" barrel makes an ideal match for long focal ratio telescopes. With a 53-degree apparent field of view, this eyepiece offers superb contrast for observing the Moon, planets, double stars, and deep-sky objects. When their rubber grips are removed, a pair of these Masuyama eyepieces can also fit in many 2" binoviewers.

  • Legendary Masuyama eyepiece with 45mm focal length and 2" barrel
  • Incorporates latest glass and multi-coating technology
  • Provides ultra-high-contrast views of the Moon, planets, and deep-sky objects
  • Ideal for long focal ratio telescopes
  • 128 mm long and weighs 508g (1 lb - 1.9 oz)

Useful Resources

Eyepiece Series Masuyama
Focal Length 45mm
Barrel Size 2" (50.8mm)
Apparent Field of View (Mfg Specified) 53°
Eye Relief (Designed) 32mm
Filter Threads Standard 2" Filter Thread (M48 x 0.75)
Coatings Fully Multi-Coated
Lens Elements 5
Lens Groups 3
Blackened Lens Edges Yes
Barrel Type Smooth sided
Protective Plastic Storage Container Yes - Free Agena Eyepiece Container
Protective Plastic Storage Container Size Agena 85x120mm
Height (With Eyeguard Extended) 128mm
Maximum Width 65mm with rubber grip; 60mm without it
End Caps 2
Rubber Eye Guard Yes
Warranty One year
Weight 17.9 oz / 508 g
Country of Manufacture Japan

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