100-300 f4 with 1.4x teleconverter for nikon dslr

The Sigma 100-300mm f/4 EX DG IF HSM for Nikon F-Mount

The Sigma 100-300mm f/4 EX DG IF HSM is a high-performance telephoto zoom lens designed for Nikon F-mount digital SLR cameras. It occupies a specialized position in the Sigma "Excellence" (EX) lineup, offering a constant f/4 maximum aperture across its entire focal range. This lens was engineered to bridge the gap between the standard 70-200mm zoom and the longer 400mm prime lenses, providing a versatile 3x zoom ratio without the variable aperture limitations found in consumer-grade telephotos. The optical formula consists of 16 elements arranged in 14 groups. It is a "DG" (Digital Grade) lens, meaning it features specialized coatings designed to minimize reflections from the image sensor, though it remains fully compatible with both 35mm full-frame (FX) and APS-C (DX) sensor formats. On a Nikon DX-format body, the focal length equivalent becomes 150-450mm, making it a powerful tool for long-range subjects where a constant aperture is required for consistent exposure control.

Optical Performance and Glass Technology

The image quality of the Sigma 100-300mm f/4 is defined by its use of four Special Low Dispersion (SLD) glass elements. These elements are strategically placed to correct chromatic aberrations, particularly the secondary spectrum that often plagues telephoto lenses at the longer end of the zoom. By minimizing color fringing, the lens maintains high contrast and edge-to-edge sharpness even when shooting wide open at f/4. The internal focusing (IF) system ensures that the physical length of the lens does not change during focusing, which prevents the front element from rotating and maintains the center of gravity. The lens employs a 9-blade diaphragm, which produces a circular aperture to improve the quality of out-of-focus highlights (bokeh), creating a smooth transition between the subject and the background. The multi-layer lens coating is specifically optimized for digital sensors to reduce flare and ghosting, which is critical when shooting into backlit environments or under harsh stadium lighting.

Mechanical Build and Autofocus Capabilities

Handling on a professional shoot is supported by the Hyper Sonic Motor (HSM), which provides fast and quiet autofocus. The HSM system utilizes ultrasonic waves to drive the focusing group, allowing for high-speed acquisition of moving targets. A key feature of this motor is the full-time manual focus override; the photographer can rotate the focus ring to make fine adjustments without needing to switch the lens or camera body into manual mode. The lens is constructed with a robust metal barrel and features a dedicated, removable tripod collar. This collar allows for quick rotation between landscape and portrait orientations while keeping the lens balanced on a monopod or tripod. The 82mm front filter thread is non-rotating due to the internal focusing design, facilitating the use of circular polarizers or graduated neutral density filters. With a minimum focusing distance of 1.8 meters (70.9 inches) throughout the zoom range, the lens offers a maximum magnification ratio of 1:5, allowing for tight framing of smaller subjects like birds or detail shots in sports.

Video Application and Motion Considerations

For video production on Nikon DSLRs or adapted mirrorless systems, the Sigma 100-300mm f/4 offers several mechanical advantages. The constant f/4 aperture is highly beneficial for video, as it allows the cinematographer to zoom from 100mm to 300mm without the exposure darkening, a common issue with f/4.5-5.6 variable aperture lenses. The zoom ring has a substantial throw, providing enough resistance for smooth, controlled focal length changes during a take. While the lens lacks internal optical stabilization, its weight of approximately 1440 grams provides a level of natural inertia that helps dampen micro-jitters when used on a fluid head tripod. The internal focusing mechanism means that matte boxes and follow-focus systems do not need to account for a telescoping barrel. However, users should note that the HSM motor, while quiet, may still be picked up by on-camera microphones during rapid focus shifts, making external audio recording or manual focus pulling preferable for professional video work.

Performance in Indian Shooting Scenarios

In a wildlife photography context, such as a safari in Ranthambore National Park, the 100-300mm range is particularly effective. At the 100mm end, it allows for environmental portraits of tigers or leopards within their habitat, while the 300mm reach provides the necessary magnification for distant birdlife or shy mammals. The f/4 aperture is critical during the low-light hours of dawn and dusk safaris, where light levels drop rapidly and maintaining a fast shutter speed is essential for sharp images. In a sports environment, such as a cricket match at the Wankhede Stadium in Mumbai, the HSM autofocus is capable of tracking players moving across the field. The constant aperture allows the photographer to set a manual exposure for the pitch and maintain it regardless of the zoom level, ensuring a consistent look across a burst of images. For architectural or fashion shoots in a location like the Stepwells of Rajasthan, the lens's compression at 300mm can be used to stack visual elements, making distant structures appear closer to the subject and creating a dramatic sense of scale that shorter lenses cannot replicate.

Compatibility and Pairing Options

The Sigma 100-300mm f/4 EX DG IF HSM is designed for the Nikon F-mount and is compatible with a wide range of bodies. On modern Nikon DSLRs like the D850 or D780, it utilizes the full resolution of the sensor with high-speed communication for autofocus and aperture control. It is also compatible with Nikon Z-series mirrorless cameras when used via the FTZ or FTZ II mount adapter, though users should verify specific firmware compatibility for the HSM motor. This lens pairs effectively with Sigma’s dedicated APO Teleconverters (1.4x and 2.0x). With the 1.4x EX DG teleconverter, the lens becomes a 140-420mm f/5.6, which still supports autofocus on most mid-to-high-end Nikon bodies. With the 2.0x teleconverter, it becomes a 200-600mm f/8, where autofocus may be limited to cameras with f/8-compatible AF points. For filtration, the 82mm thread is a standard size for professional kits, making it easy to pair with high-quality UV protectors or ND filters for outdoor work.

Limitations and Alternative Considerations

While the Sigma 100-300mm f/4 is a versatile professional tool, it has specific limitations that may lead a photographer to choose a different lens. The most significant omission is the lack of Optical Stabilization (OS). In low-light handheld situations, this makes it more difficult to use than modern stabilized zooms like the Nikon 200-500mm f/5.6E ED VR or the Sigma 150-600mm Contemporary. Photographers who primarily shoot handheld in dim environments may find the lack of stabilization a challenge at the 300mm focal length. Furthermore, while f/4 is faster than consumer zooms, it does not offer the same depth-of-field isolation or light-gathering capability as a 300mm f/2.8 prime or a 120-300mm f/2.8 zoom. Those requiring the absolute maximum background separation for field sports or low-light indoor events may find the f/2.8 alternatives more suitable despite their significantly higher weight and bulk. Finally, the 1.8-meter minimum focus distance, while standard for its class, means it is not suitable for macro photography or extremely tight headshots in small studio spaces where a 70-200mm lens with a shorter minimum focus distance would be more practical.

This is one of the highly rated lens.

Its ideal for wildlife, bird & sports photography.