SVBONY SV149 Canon EF/EF-S Lens to 1.25″ Camera & Eyepiece Adapter

Product Overview

The SVBONY SV149 is a mechanical adapter that mounts a Canon EF or EF-S camera lens in front of a 1.25″ eyepiece or 1.25″-nosepiece astronomy camera. One side takes the Canon bayonet; the other is a 1.25″ holder with a brass compression ring. The body is CNC-machined aluminium alloy with an M60 x 0.75 adapter thread, measures 70 x 41 x 70 mm and weighs 122 g.

Who It's For

This is a good match if you own Canon EF or EF-S lenses and want to use one as a short-focal-length optic for an astronomy camera — for wide-field Milky Way and constellation imaging — or to view through a lens with a 1.25″ eyepiece.

Key Features & Design

• Canon EF / EF-S bayonet: accepts Canon full-frame and APS-C lenses.
• 1.25″ holder with brass compression ring: grips an eyepiece or camera nosepiece evenly without marking the barrel and keeps it from slipping out.
• M60 x 0.75 adapter thread on the lens-side body.
• CNC-machined aluminium alloy: all-metal, black finish.
• Compact: 70 x 41 x 70 mm, 122 g.

Recommended Uses

• Wide-field astrophotography: a Canon lens in front of a 1.25″-nosepiece astronomy camera for large nebula fields, Milky Way regions and constellations.
• Planetary-camera field work: pairing a small-sensor camera with a telephoto lens for lunar or wide views.
• Visual use with a lens: a 1.25″ eyepiece behind a Canon lens for casual stargazing.

Compatibility and Accessory Notes

• Lenses: Canon EF and EF-S.
• Eyepieces and cameras: anything with a standard 1.25″ barrel or nosepiece.
• With SVBONY cameras: SVBONY pairs the SV149 with its SV405CC and SV605CC cooled cameras. Both are available as separate listings.
• Focus: the lens's own focus ring sets focus. Whether infinity focus is reached depends on how far the camera or eyepiece slides into the holder — send us your lens and camera and we will check the fit with you.

Good to Know Before You Order

• Mechanical adapter only: there is no electronic contact, so autofocus and electronic aperture control are not available. Lenses with a manual focus ring are easiest to use.
• Canon mount only: other lens mounts need their own adapter.

Frequently Asked Questions

Is it difficult to set up?

No. Mount the lens on the Canon bayonet, slide the camera nosepiece or eyepiece into the 1.25″ holder and tighten the brass ring.

Will it work with EF-S lenses?

Yes. SVBONY lists Canon EF and EF-S compatibility.

Can I control aperture?

Not electronically. The adapter has no electrical contacts.

Which cameras does it suit?

Any astronomy camera with a 1.25″ nosepiece; SVBONY shows it with the SV405CC and SV605CC.

Can I look through it with an eyepiece?

Yes. A 1.25″ eyepiece fits the holder for visual use behind the lens.

Bottom Line

In short: an all-metal Canon EF/EF-S to 1.25″ adapter with a brass compression ring, turning a Canon lens into a wide-field optic for a 1.25″ astronomy camera or eyepiece.