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Opticron MM4 77 ED Fieldscope- HDF T 18-54x Zoom Eyepiece Included

SKU 413550-EAN
Sold out
Original price £878.00 - Original price £878.00
Original price
£878.00 - £878.00
Current price £878.00
MM4 77 Fieldscopes are the latest evolution of the MM concept pioneered and developed by Opticron over the past 25 years to meet the ever growing demand for lightweight, space saving high performance field equipment.
More Information

Designed & manufactured in Japan, the 77mm HDF ED optical system delivers a new benchmark for resolution and colour contrast and comfortably outperforms older Opticron 80mm models. What is more remarkable is the size and weight of the overall package. The MM4 77 GA ED/45 is just 320mm/12.6” long and weighs 1259g/44.4oz fully armoured. These figures read like a 65mm which cannot deliver the light transmission or apparent resolution of this 80mm class device.

Compatible with SDL, HDF T and HR eyepieces, existing owners can use eyepieces from other Opticron models with MM4 77 Fieldscopes.


77mm HDF ED APO lens design
Fully multi-coated optical system
Lightweight polycarbonate and alloy body
Fully protected in soft touch textured rubber armour
Nitrogen waterproof
Wide wheel focuser with accurate 9:1 ratio dual focus system
Retractable lens hood
Integrated objective lens cover
Large footprint +/- 90° rotating tripod sleeve
Supplied with Opticron HDF T Zoom Eyepiece
Telephoto option for SLR photography


MM4 77 GA ED Fieldscope:
Body Type: 45° angled
Size: 77
Lens Dia. (mm): 77
Lens Dia. (inch): 3
Close Focus (m): 5.5
Close Focus (f): 18
Waterproof: Yes
Prism Type: Porro
Tripod Sleeve & Mount: Rotating Sleeve
Length (mm): 320
Width (mm): 107
Depth (mm): 95
Dimensions LxWxD (mm): 320x107x95
Dimensions LxWxD (inches): 12.6x4.2x3.7
Weight (g): 1259
Weight (oz): 44.4
Weight (lb): 2.8
Armour Type: Full
Armour Material: NBR
Nitrogen Gas Filled: Yes
Retractable Lens Hood: Yes
Focusing Speed: Dual
EPTA Internal (mm): 29x0.75
EPTA Small External (mm): 35x1.1
EPTA Large External (mm): 41.5x1.1
Prism Coating: Fully multi-coated
Lens Coating: Fully multi-coated
Connection Type: 1/4"
Serial Number Location: Bottom face of tripod sleeve
Country of Origin: Japan

HDF T Zoom Eyepiece:
Eye relief (mm): 22~17
Eye relief (inch): 0.9~0.7
Waterproof: No
Length (mm): 76
Width (mm): 50
Depth (mm): 50
Dimensions LxWxD (mm): 76x50x50
Dimensions LxWxD (inches): 3x2x2
Weight (g): 206
Weight (oz): 7.3
Weight (lb): 0.5

Whats In the Box?

MM4 77 GA ED Fieldscope
Integrated objective lens cover
HDF T Zoom Eyepiece
Dust cap


Body: 30 year manufacturer's guarantee
Eyepiece: 10 year manufacturer's guarantee


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SWOP: We will swap out any optic purchased from us within 60 days of the purchase and exchange it for another brand, size, style as appropriate. Find out more here: