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1.25″ 3x ED Barlow


ASC’s 1.25″ 3x achromatic Barlow triples the magnification of each eyepiece and effectively doubles the number of eyepieces at your disposal
Full unit increases magnification of an eyepiece by 3x while maintaining a bright, high-contrast image
Air-spaced, two-element, fully-multicoated ED lenses with excellent color correction, sharpness, and image brightness
Precision-machined aluminum barrel with high-quality black-anodized finish

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Weight0.1 kg
Dimensions5 × 4.5 × 14 cm


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Size Format1.25 inch
Magnification Factor3x
Number of Lens Elements
Lens CoatingsFully multicoated
Total Length4.96 inches / 126 mm
Length of Nosepiece2.09 inches / 53 mm
Outside Length of Upper Body2.92 inches / 74.1 mm
Insertion Depth1.61 inches / 41 mm
Max Diameter Excluding Thumbscrew2.19 inches / 55.7 mm
Clear Aperture0.94 inches / 24 mm
Weight4.3 oz / 122 g
Barlow Lens Cell RemovableYes
Filter Threads at Bottom of Barlow CellYes – 1.25″ (M28.5×0.6) Filter Threads
Filter Threads Between Barlow Cell and TubeNon-standard Threads
Barrel TypeSmooth-sided
Compatible Agena Bolt Case (with Screw Removed)42×80
Compatible Bolt Case (with Screw Attached)52×80
Number of Thumbscews1
Thumbscrew Thread SpecificationM4x0.7
End Caps (Subject to change without notice)2
Compression Band/Ring in Eyepiece HolderNo
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Astronomical Solutions Company

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