GPO SPECTRA™ 4x series Riflescopes

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The GPO Spectra™ 4× series is a versatile lineup of mid-tier hunting and shooting optics that balance performance, clarity, and value.

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GPO - Spectra 4x 2.5-10x44 BR (+CAD749.00) GPO - Spectra 4x 2.5-10x44i G4i Drop (+CAD849.00) GPO - Spectra 4x 4-16x50i G4i Drop (+CAD969.00)

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Description

Thanks to their 30mm center tube diameter, the 4x zoom riflescopes impress with their slim design, short length and low weight. The outstanding optical quality is highlighted by wide fields of view and high light transmission values.

Large lens diameters provide reserves of light until deep into the twilight. Unique in this class are the illuminated 4xi models featuring iControl™ illumination with automatic shut-off.

Overview — GPO Spectra™ 4× Series Riflescopes

The GPO Spectra™ 4× series is a versatile lineup of mid-tier hunting and shooting optics that balance performance, clarity, and value. These scopes are well-suited to hunters and shooters who want reliable glass with modern features (such as illuminated reticles and advanced reticle options) without jumping to premium price points.

Models in the Series

GPO Spectra™ 4× 2.5-10×44 BR

Approx. CAD $749

Magnification: 2.5–10×
Objective: 44 mm
Reticle: BR (Bullet Drop)
Great for general-purpose hunting across a wide range of distances.
Lower magnification is fast in close and capable out to medium ranges.

GPO Spectra™ 4× 2.5-10×44i G4i Drop

Approx. CAD $849

Magnification: 2.5–10×
Objective: 44 mm
Reticle: G4i Drop (illum.)
Adds an illuminated reticle and G4i Drop subtensions for faster range holdovers.
Popular choice for hunters wanting quick ranging and low-light usability.

GPO Spectra™ 4× 4-16×50i G4i Drop

Approx. CAD $969

Magnification: 4–16×
Objective: 50 mm
Reticle: G4i Drop (illum.)
Larger zoom range and bigger objective for stronger performance at longer targets and better low-light brightness.
Best choice in the lineup for longer shots and more versatile field use.

Key Features Across the Line

Modern Zoom Ranges

Covers popular magnification bands for hunting and sport shooting.
2.5–10× models are excellent for general use and wooded/close terrain.
4–16× gives clearer reach for open-country shooting.

Illuminated Reticle Options

Models with “i” include illuminated reticles — helpful at dawn/dusk or in shaded conditions.
The G4i Drop reticle provides built-in hold points for quick elevation correction during hunting.

Rugged Build

Waterproof and fog-proof construction for field reliability.
GPO scopes are designed to withstand recoil and harsh outdoor conditions.

Optical Performance

Multi-coated lenses optimize light transmission and contrast.
Good clarity and color contrast for the price segment.

Who Each Model Is Best For

Model	Best For	Why
2.5–10×44 BR	General hunting	Versatile zoom range and simple reticle
2.5–10×44i G4i Drop	Woodland / low-light hunting	Illuminated reticle and practical holdovers
4–16×50i G4i Drop	Open country / longer shots	Higher magnification and larger objective

Quick Buying Tips

Need speed & simplicity? 2.5–10×44 models hit fast targets and cover most medium distances.
Want illumination for dawn/dusk? Go for a G4i Drop “i” model.
More reach & light-gathering? The 4–16×50 version steps up in performance.

SPECTRA 4x 2,5-10×4

Magnification	.	2,5x – 10x
Field of view (FOV) m at 100m	.	16,2 – 4,1
Objective diameter (mm)	Effective diameter	44
Exit pupil diameter (mm)	Measurement of the pupilary ocular beam	12,3 – 4,4
Eye Relief (inches)	From the last optical surface	3,74
Eye Relief (mm)	From the last optical surface	95
Travel value per click at 100y	1 Click = x/100y	1
cm travel value per click at 100m	1 Click = x/100m	1
Elevation range total (cm at 100m)	100m	235
Windage range total (cm at 100m)	100m	235
Parallax compensation	Parallax free at x distance	100 m
Transmission Daylight	ISO 14490-5:2005	87%
Height (inches)	Without covers	2,44
Height (mm)	Without covers	62
Width (inches)	Fully extended	2,85
Width (mm)	Fully extended	62
Length (inches)	At outside diameter	13,38
Length (mm)	At outside diameter	340
Tube diamter (mm)	Width of main tube	30
Weight (ounces)	Without covers	21,48
Weight (grams)	Without covers	609
Mechanical outer diameter (objective mm)	Objective end of scope	52,5
Mechanical outer diameter (ocular mm)	Ocular end of scope	45,3
Reticle Option	.	BR
Accessories included with the purchase	.	instruction manual, cleaning cloth, bikini scope cover, throw lever

SPECTRA 4x 2,5-10x44i

Magnification	.	2,5x – 10x
Field of view (FOV) m at 100m	.	16,2 – 4,1
Objective diameter (mm)	Effective diameter	44
Exit pupil diameter (mm)	Measurement of the pupilary ocular beam	12,3 – 4,4
Eye Relief (inches)	From the last optical surface	3,74
Eye Relief (mm)	From the last optical surface	95
Travel value per click at 100y	1 Click = x/100y	1
cm travel value per click at 100m	1 Click = x/100m	1
Elevation range total (cm at 100m)	100m	235
Windage range total (cm at 100m)	100m	235
Parallax compensation	Parallax free at x distance	100 m
Transmission Daylight	ISO 14490-5:2005	87%
Height (inches)	Without covers	2,44
Height (mm)	Without covers	62
Width (inches)	Fully extended	2,85
Width (mm)	Fully extended	72,6
Length (inches)	At outside diameter	13,38
Length (mm)	At outside diameter	340
Tube diamter (mm)	Width of main tube	30
Weight (ounces)	Without covers	21.83
Weight (grams)	Without covers	619 g
Mechanical outer diameter (objective mm)	Objective end of scope	52,5
Mechanical outer diameter (ocular mm)	Ocular end of scope	45,3
Reticle Option	.	G4i Drop
Accessories included with the purchase	.	instruction manual, cleaning cloth, bikini scope cover, throw lever

SPECTRA 4x 4-16x50i

Magnification	.	4x – 16x
Field of view (FOV) m at 100m	.	10,4 – 2,6
Objective diameter (mm)	Effective diameter	50
Exit pupil diameter (mm)	Measurement of the pupilary ocular beam	9,5 – 3,1
Eye Relief (inches)	From the last optical surface	3,74
Eye Relief (mm)	From the last optical surface	95
Travel value per click at 100y	1 Click = x/100y	1
cm travel value per click at 100m	1 Click = x/100m	1
Elevation range total	cm at 100m	210
Windage range total	cm at 100m	210
Parallax compensation	Parallax free at x distance	10 m – 8
Transmission Daylight	ISO 14490-5:2005	90%
Height (inches)	Without covers	1,88
Height (mm)	Without covers	47,9
Width (inches)	Fully extended	3,2
Width (mm)	Fully extended	81,2
Length (inches)	At outside diameter	14,5
Length (mm)	At outside diameter	370
Tube diamter (mm)	Width of main tube	30
Weight (ounces)	Without covers	20,08
Weight (grams)	Without covers	629
Mechanical outer diameter (objective mm)	Objective end of scope	57,2
Mechanical outer diameter (ocular mm)	Ocular end of scope	45,8
Reticle Option	.	G4i Drop, G4i
Accessories included with the purchase	.	instruction manual, cleaning cloth, bikini scope cover, battery CR2032, throw lever

GPO 3-12x44 Centuri Riflescope (G4ii Reticle)

CAD749.00

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GPO SPECTRA™ 6x series Riflescopes

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GPO SPECTRA™ 4x series Riflescopes

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SPECTRA 4x 4-16x50i

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