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Buy the Sigma 65mm f/2 DG DN Contemporary
Updates:
02/18/2021: Gallery Images added
(From Sigma lens literature)
Sigma 65mm f/2 DG DN Contemporary
The ultra-sharp I series SIGMA 65mm F2 DG DN | Contemporary. A compact, short telephoto prime that offers a stunning photographic experience for mirrorless users.
The SIGMA I series introduces compact, beautifully designed, high-performance optics for mirrorless camera systems. In its first collection, SIGMA introduces a high-spec, daily use lens to the Contemporary lens line-up, which combines excellent resolving power with a small body that is perfectly weighted for mirrorless systems.
Long supported among photography lovers and even used for shooting films, a 65mm lens allows a slightly more compressed perspective than standard lenses, opening up a variety of creative approaches for both photography and film-making.
The ultra-sharp 65mm F2 DG DN | Contemporary can capture extremely fine detail even wide open at its maximum aperture of F2, and produces large and round bokeh.
Furthermore, its all-metal body, which is a feature across all I series lenses, and the design with great care paid on the touch and even how delightful the sound made during operation is will make the lens a joy to use and own.
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[Key features]
- I series｜A new photographic experience, “Premium Compact Primes” for mirrorless users
The SIGMA I series features full-frame-compatible lenses that offer mirrorless users a new and better alternative, both in the experience of shooting with the lens and in the impressive results it is able to achieve.
One of the key advantages of mirrorless cameras is their smaller form-factor, and this new 65mm optic is designed to be perfectly matched to these more compact systems without sacrificing performance. This combination of superb optical quality with exceptional portability, not previously possible with DSLR systems, will bring new opportunities to this and future generations of photographers.
Simultaneously, SIGMA is aware that, in this day and age when we have such huge diversity when it comes to what we use to photograph, as represented by smartphones, people look for something more than a mere act of "taking pictures" when they choose to own a camera and lenses. SIGMA's excellence in development and processing technologies has been built up since its founding in 1961, and has become further sophisticated with the introduction of the SIGMA Global Vision in 2012. With this as a base, SIGMA has given careful thought how photographers use and enjoy their lenses, including optical design, advanced functionality, build quality and the experience of picking up and using the lens, and with all of this carefully considered, the I series was born.
- New standards of optical performance for the Contemporary line
The 65mm F2 DG DN | Contemporary brings to the table the highest level of optical performance at a maximum aperture of F2 with a lens body of a size that matches a mirrorless system.
Axial chromatic aberration, which tends to be noticeable with medium and telephoto lenses and cannot be effectively reduced in-camera, is corrected thoroughly with the use of SLD glass, allowing it to capture sharp details. A pair of glass-molded aspherical lenses is used to correct spherical and comatic aberration, as well as astigmatism, while also helping make the lens configuration smaller in size. A combination of the latest optical design with advanced processing technology that brings life to the former gives the 65mm F2 DG DN | Contemporary its excellent optical performance as well as compact size.
In addition to the beautiful bokeh effect thanks to the control of spherical aberration, the reduced vignetting effects help curb lemon-shaped or swirly bokeh and give photographers greater control over the out of focus areas of their images. On top of it all, the SIGMA-standard anti-ghosting and anti-flare technology ensures high-end performance in backlit conditions.
- Exceptional I series build quality with a compact form-factor
All I series lenses have an all-metal construction. The precision-cut aluminum parts not only give the barrel a sleek, stylish finish, but provide superb durability, which improves the quality of the entire product. Metal materials are also used in internal structures that slide with the operation ring for added robustness. These high-precision components crafted with SIGMA’s cutting-edge metalworking technology are also used in SIGMA’s cine lens line-up for professional cinematographers and provides an exquisite feel to touch as well as sound effects, making photographers want to reach for it and play with it over and over again.
The cover ring between the focus ring and the aperture ring has hairline processing that is also used for the rear cylinder of the Art line. This covering functions as a finger hold when attaching or detaching the lens.
[Additional features]
- Lens construction: 12 elements in 9 groups, with 1 SLD glass and 2 aspherical lenses
- Compatible with high-speed autofocus
- Stepping motor
- Compatible with lens-based optical correction
* Function available on supported cameras only. Available corrections may vary depending on the camera model.
- Mount with dust- and splash-proof structure
- Super Multi-Layer Coating
- Aperture ring
- Focus Mode Switch
- Lens Hood
- Compatible with SIGMA USB DOCK UD-11 (sold separately / for L-Mount only)
- Designed to minimize flare and ghosting
- Supports DMF, AF+MF (for Sony E-mount only)
- Inner focus
- Every single lens undergoes SIGMA's proprietary MTF measuring system "A1"
- 9-blade rounded diaphragm
- High-precision, durable brass bayonet mount
- "Made in Japan" craftsmanship
To learn more about SIGMA's craftsmanship, please visit SIGMA website at
https://www.sigma-global.com/en/about/craftsmanship/
[Key specifications] The figures below are for L-Mount.
Lens construction: 12 elements in 9 groups (1 SLD glass, 2 aspherical lenses)｜
Angle of view：36.8°｜Number of diaphragm blades：9 (Rounded diaphragm)｜
Minimum aperture：F22｜Minimum focusing distance：55cm / 21.7in.｜
Maximum magnification ratio：1:6.8｜Filter size：φ62mm｜
Maximum dimensions x length：φ72mm×74.7mm / φ2.8in.×2.9in.｜Weight：405g / 14.3oz.
Notes:
The L-Mount Trademark is a registered Trademark of Leica Camera AG.
Appearance and specifications are subject to change without notice.
Sigma 65mm f/2 DG DN Contemporary
Your purchases support this site
Buy the Sigma 65mm f/2 DG DN Contemporary
Sigma 65mm f/2 DG DN Contemporary User Reviews
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The Sigma 65mm F2 DG DN blends artistry and precision, delivering breathtaking detail, rich bokeh, and an unmatched shooting experience. I am adept at troubleshooting sophisticated technology problems. For more tech insights, explore my latest blog on troubleshooting why your Arlo camera isnt recording motiona must-read for smart security users!
reviewed March 28th, 2025
When you rely on your Arlo camera for home security, its concerning if its not functioning as expected, particularly when it comes to detecting motion and recording footage. If youve noticed that your Arlo camera is not recording when motion is detected, it could be due to a variety of reasons, ranging from simple configuration issues to more complex technical glitches. Understanding the root causes of this problem can help you take the necessary steps to resolve it and restore your security system to its full functionality.
One of the first things to check if your Arlo camera is not recording when motion is detected is the motion detection settings. Arlo cameras come with customizable motion detection zones and sensitivity settings, and sometimes these may be set too low or configured improperly. If the sensitivity is set too low, the camera may not detect motion effectively, or it might ignore small movements. On the other hand, if the zones are incorrectly configured, the camera may be overlooking areas where motion is actually occurring. To fix this, you can log into your Arlo account, access the camera settings, and adjust the motion sensitivity and detection zones accordingly. Make sure that the area where you want the camera to detect motion is properly covered within these zones.
Another important factor to consider is the Arlo camera's battery or power source. Arlo cameras, particularly the wire-free models, are powered by batteries, and if the battery is low, the camera may not have enough power to operate at full capacity, which can lead to issues with motion detection and recording. If your Arlo camera is not recording when motion is detected, it could be a sign that the battery needs to be recharged or replaced. Check the battery level through the Arlo app or on the web portal, and if its low, recharge or replace the batteries. For wired models, ensure that the camera is properly connected to its power source and that there is no loose connection.
Another possibility is that the Arlo camera's firmware is out of date. Firmware updates are regularly released by Arlo to fix bugs, improve functionality, and enhance performance. If your Arlo camera is not recording when motion is detected, an outdated firmware version could be the culprit. To resolve this, check for any available updates for your camera through the Arlo app or web portal. Keeping the firmware up to date ensures that your camera is operating with the latest features and fixes, which may resolve the motion detection issue.
Camera placement can also affect whether your Arlo camera not recording when motion detected. If the camera is facing a direct light source, such as sunlight or a strong artificial light, this can create glare that interferes with motion detection. Additionally, if the camera is positioned too high or too low, it may not capture the movement accurately, or it could miss it altogether. Make sure that your Arlo camera is placed at an optimal height and angle to capture motion effectively. Ideally, it should be facing the area where motion is most likely to occur, such as entryways or driveways, and should be positioned away from intense light sources to reduce glare.
Sometimes, the issue may be related to Wi-Fi connectivity. Since Arlo cameras are connected to your home network via Wi-Fi, if the connection is weak or intermittent, it can affect the cameras ability to record or transmit footage. If your Arlo camera is not recording when motion is detected, check the signal strength in the area where the camera is placed. You can use the Arlo app to see if the cameras connection strength is adequate. If the signal is weak, try repositioning the camera closer to your router or adding a Wi-Fi extender to boost the signal. Ensuring a stable and strong connection between your camera and your network is vital for reliable performance.
Another reason Arlo camera is not recording when motion is detected could be due to the camera mode settings. Arlo cameras have several modes such as armed, disarmed, schedule, and geofencing. If the camera is set to disarmed mode, it wont record any motion events. Check your cameras mode settings to make sure that its set to armed mode or that a schedule has been set for it to detect and record motion during specific times. Additionally, if you are using geofencing, the camera may only be active when you are away from home. Make sure that your geofencing settings are correctly configured, and that the camera is set to detect motion while you are home if necessary.
If all else fails, there could be an issue with the Arlo cameras hardware. Over time, cameras can experience wear and tear, and internal components may malfunction. If your Arlo camera is not recording when motion is detected despite troubleshooting the settings, battery, firmware, and Wi-Fi, it might be time to contact Arlos customer support. They can guide you through additional troubleshooting steps or assist with a replacement if your camera is defective.
In conclusion, if your Arlo camera is not recording when motion is detected, there are several potential causes that need to be explored. From adjusting motion sensitivity and camera placement to ensuring the battery is charged and the firmware is up to date, many solutions are available. By following these troubleshooting steps, you can quickly resolve the issue and restore your cameras ability to monitor and record motion as intended. If all else fails, reaching out to Arlo support may be necessary to get your camera back in working order. With the right approach, you can ensure that your Arlo camera continues to provide reliable security for your home or business.
