- Focal Length
- 55 mm
- Image Size
- Φ28 mm
- Minimum Operation Distance
- 0.45 m
- Magnification Range
- 0.04x ~ 0.137x
- Field of View
- 4K 7μm（28.7 mm）：29°
- M42 × P1
- Φ56 × 62.22 mm
- 278.1 g
AF5528-M42 M42 Mount Lens
APS-C 55mm Focal Length FA LENS
The APS-C fixed-focus lens are optimized for the
application of large pixel line scan cameras in the
machine vision industry, with excellent imaging
quality, high image uniformity and low distortion
design, magnification range from 0.04x to
0.137x. It is suitable for defect detection
applications in PCB, packaging and printing
■ Ultra-high resolution and consistency of image clarity
■ Large aperture and low distortion
■ Maximum image circle φ28mm, applicable to APS-C area scan and 4K 7μm line scan cameras
Minimum Operation Distance
0.04x ~ 0.137x
Field of View
M42 × P1
Flange Back Length
Φ56 × 62.22 mm
-10 ~ 50℃
What is the resolution(μm) of the lens?
Resolution is a measured by how closely 2 points can be before they cannot be distinguished. For example, 1μm resolution means that 2 points that are 1μm away from each other can be distinguished. Resolution values in this catalog are theoretical resolutions for the lenses. The following is a formula to calculate theoretical resolution based on a lens's ray diffraction with no aberration.
Resolution=0.61×λ/NA λ : Wavelength 0.61: Fixed Number
Distortion is the aberration of a lens where a straight object outside of the optical axis appears curved. Distortion of a straight line towards the center is called pincushion distortion, while distortion expanding outwards is called barrel distortion
Distance from the front end of a lens system to the object under inspection.
The value indicates lens brightness. It is calculated by dividing the focal distance of the lens by its effective diameter (entrance pupil diameter D mm) looking from its object side. It can also be calculated by NA and the lens' optical magnifi cation ( ). The smaller the number the brighter the lens is.
Field of View
Field of view is the size of an object that can be shot when the lens is attached to a camera.
The size of fi eld of view is (sensor size) ÷ (optical magnification ).
(Calculation Example) Optical Magnification =0.2x, camera Size 1/2" (4.8mm Long, 6.4mm Wide) :
Size of Field of View Length =4.8/0.2=24 (mm)
Width =6.4/0.2=32 (mm)