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AstrHori 18mm f/8 Macro Probe

Canon RF

AstrHori 18mm f/8 Macro Probe

Focal length
18 mm
Aperture
f/8
Weight
698 g
Filter diameter
–
Min. focus distance
47 cm
Length
458 mm
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At a Glance

The APS-C probe lens for Canon RF offers an 18 mm focal length, equivalent to 29 mm on full frame. Magnification reaches 2:1, the minimum focus distance is 47 cm and the maximum aperture is f/8. The 458 mm barrel is 60 mm in diameter and weighs 698 g. Focus is set manually. It is aimed at macro, product and video work.

Good for

  • Macro
  • Product
  • Video

Worth knowing

  • APS-C image circle: on full-frame cameras only usable in crop mode, at reduced resolution.
  • No autofocus: focusing is manual only.

Derived from the manufacturer data, not from our own tests. How we check

Technical Specifications

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Min. focal length
18 mm
Max. focal length
18 mm
Max. aperture (min. zoom)
f/8
Max. aperture (max. zoom)
f/8
Min. aperture
f/28
Elements
23
Groups
17
Weight
698 g (1.54 lb)
Filter diameter
–
Min. focus distance
47 cm (18.5 in)
Max. magnification
2:1 (2×)
Length
458 mm (18.03 in)
Diameter
60 mm (2.36 in)

Manufacturer data: astrhori.cn

Last checked: October 13, 2026 (against the manufacturer data) · How we check

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Compare with other lenses

Which cameras does the AstrHori 18mm f/8 Macro Probe fit?

The AstrHori 18mm f/8 Macro Probe is designed for APS-C sensors. On APS-C Canon RF cameras its field of view equals 29 mm in full-frame terms. Full-frame bodies use it in APS-C (crop) mode, recording only part of the sensor and fewer megapixels.

Canon RF cameras

Full frame (in APS-C mode):
Canon EOS R8 Mark II,Canon EOS R6 V,Canon EOS R6 Mark III,Canon EOS C50,Canon EOS R1,Canon EOS R5 Mark II,Canon EOS C400,Canon EOS C80,Canon EOS R8,Canon EOS R6 Mark II,Canon EOS R5 C,Canon EOS R3,Canon EOS R5,Canon EOS R6,Canon EOS Ra,Canon EOS RP,Canon EOS R
APS-C:
Canon EOS R50 V,Canon EOS R100,Canon EOS R50,Canon EOS R7,Canon EOS R10,Canon EOS C70

AstrHori 18mm f/8 Macro Probe compared

Key specs side by side with the most similar Canon RF lenses.

LensAstrHori 18mm f/8 Macro ProbeAstrHori 18mm f/8 (APS-C) 90° Macro ProbeAstrHori 18mm f/8 ShiftVenus Laowa 17mm F4 Zero-D Tilt-Shift
Focal length18 mm18 mm18 mm17 mm
Max. aperturef/8f/8f/8f/4
Weight698 g760 g164 g810 g
Filter diameter––58 mm86 mm
Min. focus distance47 cm47 cm34 cm25 cm
Length458 mm470 mm36 mm111 mm
Autofocusnononono
Image stabilizationnononono
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AstrHori 18mm f/8 Macro Probe: FAQ

Does the AstrHori 18mm f/8 Macro Probe have autofocus?

No, the AstrHori 18mm f/8 Macro Probe has no autofocus; you focus it manually.

Does the AstrHori 18mm f/8 Macro Probe have image stabilization?

No, the AstrHori 18mm f/8 Macro Probe has no stabilization of its own. On cameras with in-body image stabilization (IBIS) the image is still stabilized.

How much does the AstrHori 18mm f/8 Macro Probe weigh?

The AstrHori 18mm f/8 Macro Probe weighs 698 g. It is 458 mm long with a diameter of 60 mm.

How close can the AstrHori 18mm f/8 Macro Probe focus?

The minimum focus distance of the AstrHori 18mm f/8 Macro Probe is 47 cm, measured from the sensor plane.

Is the AstrHori 18mm f/8 Macro Probe a full-frame lens?

No, the AstrHori 18mm f/8 Macro Probe is an APS-C lens. On APS-C cameras its field of view equals 29 mm in full-frame terms.

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