3627 Series 180 Degrees 8MP HD Fisheye Lens Without Vignetting
How to choose a fisheye lens without vignetting?
Fisheye lenses are loved by photography enthusiasts because of their unique ultra-wide-angle viewing angle, but at the same time, vignetting is also one of its common
problems. So, how to choose a fisheye lens with less vignetting?
Understand vignetting
What are vignettes? Vignetting refers to the phenomenon that the brightness of the corners or edges of a photo is significantly lower than that of the central area. In
fisheye lenses, the vignetting phenomenon is more obvious due to the relationship between the physical structure of the lens and the incident angle of light.
Causes of vignetting:
Lens design: The optical design of the lens, the number and arrangement of lenses all affect the degree of vignetting.
Aperture size: The larger the aperture, the more obvious the vignetting will be.
Sensor size: Full-frame cameras have larger sensors and are more prone to vignetting.
How to choose a fisheye lens with less vignetting?
Choose big brand, high-quality lenses:
Better optical design: Big brands usually have more advanced optical design technology that can effectively control vignetting.
Better workmanship: High-quality lenses have more refined manufacturing processes and can reduce optical defects.
Choose the lens that suits your camera sensor:
Full-frame lenses: Full-frame lenses generally have less vignetting than APS-C-frame lenses because the sensor is larger and can accommodate more light.
APS-C lens: Although APS-C lenses have relatively more vignetting, some manufacturers will launch optimized fisheye lenses for APS-C cameras to reduce vignetting.
Consider the focal length of the lens:
The longer the focal length, the less vignetting: Generally speaking, the longer the focal length of a fisheye lens, the less obvious the vignetting phenomenon.
Check out the lens review:
Refer to professional reviews: Before purchasing, you can check relevant lens reviews to understand the vignetting performance of different fisheye lenses.
Pay attention to the samples: By viewing the samples, you can intuitively feel the imaging quality and vignetting of the lens.
Post processing:
Software correction: Most image editing software provides the function of correcting vignetting, which can effectively reduce the impact of vignetting.
Manual adjustment: For complex vignetting situations, it can be improved by manually adjusting parameters such as brightness and contrast.
Other factors affecting vignetting
Shooting distance: The closer you are to the subject, the more obvious the vignetting will be.
Aperture value: The larger the aperture, the more obvious the vignetting.
Shooting angle: Different shooting angles will also affect the degree of vignetting.
| Model:OKS-3627-A4-650 |
| Optical Specifications |
| NO. | Items | Description |
| 1 | Focal-Length | 1.49mm±0.5mm |
| 2 | F/No. | F2.0±5% |
| 3 | OpticalBack Focal Length | 3.05mm±0.1 |
| 4 | Mechanical Back Focal Length | 2.46mm±0.1 |
| 5 | MAX Image Circle | θ6.4 |
| 6 | Lens Structure | 2G2P+IR |
| 7 | Mount Type | M12*0.5 |
| 8 | FOV | Sensor | H | V | D |
| 1/2.8" | 186° | 112° | 210° |
| 1/2.9" | 182° | 110° | 205° |
| 1/3" | 165° | 128° | 200° |
| 9 | IR Filter | 650nm |
| 10 | TTL | 15MM |
| 11 | Waterproof Level | IP68 |
| 12 | Working Temperature | -40℃~+85℃ |