Reeflex Ultra Telephoto Review: 300mm–600mm Lens for iPhone & Android

The mobile photography and pro video landscape has shifted with the launch of the Reeflex Ultra Telephoto, a lens that brings a level of reach and background compression previously reserved for bulky, professional DSLR rigs. By leveraging high-quality lanthanum glass and sophisticated optics, this lens transforms a standard smartphone into a powerful long-range imaging tool.

I was lucky enough to be able to test the Reeflex Ultra Telephoto lens on both the iPhone 17 Pro and a wide range of Android Flagships ahead of the launch on Kickstarter. Please watch the above video for photo and video samples.

Hardware and Technical Specifications

The Ultra Telephoto is a precision instrument built for durability and optical clarity. It features a body crafted from aerospace-grade aluminium alloy and weighs in at 310 grams without the lens cap on.

At its core are four optical elements made from lanthanum glass, designed to minimize chromatic aberration and maintain sharpness across the frame.

KEY SPECS

• Magnification: 3x optical magnification when paired with your phone's native telephoto lens.
• Equivalent Focal Lengths:
• iPhone 17 Pro: 300mm (or 600mm with an 8x sensor crop).
• Samsung S26 Ultra: 345mm.
• Vivo X200 Ultra: 255mm.
• Mounting: Standard 17mm thread, compatible with Reeflex cases and any 3rd party case that supports 17mm lenses.
• Filter Support: Fully compatible with the ReeMag magnetic ND filter system.

Minimum Focus Distance

One critical technical consideration is the minimum focus distance, which varies significantly across flagship sensors. Knowing these distances is essential for achieving sharp focus:

Photo Performance: Optical vs. Computational Zoom

While modern flagships offer "virtual" or computational zoom, these methods often rely on sensor cropping and heavy-handed AI interpolation. The Reeflex Ultra Telephoto provides a purely optical advantage.

By using the full readout of the telephoto sensor, you maintain superior light capture, higher dynamic range, and reduced noise. In real-world testing, the difference between the computational 10x result and the Ultra Telephoto 15x is massive, delivering significantly more detail and a natural texture that software cannot replicate.

Optimization Tips for Photographers

To achieve the best photographic results, consider these professional workflows:

• Manual Control: Use the Reeflex Pro Camera app (iOS) or MotionCam Pro (Android) to force the hardware to use the correct telephoto lens. This prevents the phone from digitally zooming the main wide sensor.
• Support and Shutter Speed: At 300mm+, every micro-vibration is magnified. Support the lens physically with your hand and keep shutter speeds high to avoid motion blur.
• Aggregate Burst Shots: Enable "Aggregate Burst Shots" in the Reeflex app. Capture in high-speed bursts (e.g., 10 frames) and extract the sharpest frame. This is essential for handheld shooting.
• Format Selection: Use Bayer RAW for a minimally processed 12MP image, or 48MP ProRAW for maximum resolution.

Video Performance: Mastering the Long Lens

Video is where the Ultra Telephoto proves its value for filmmakers, though it requires specific techniques to manage the extreme focal length. Standard smartphone OIS (Optical Image Stabilization) is often insufficient for 300mm handheld footage. Professional stability is attainable through three primary methods:

• The Tripod Method: Ideal for static subjects. This setup allows for pristine ProRes RAW Apple Log capture on iOS, and RAW capture with MotionCam Pro on Android, enabling you to film from a distance that doesn't disturb the subject.
• Gimbal Support: For dynamic movement, a robust gimbal like the DJI RS4 Mini provides the necessary torque to balance the added weight of the lens.
• Software Stabilization: Handheld micro-shakes can be neutralized in DaVinci Resolve. For stationary shots, "Perspective" or "Similarity" modes work best; for pans and tilts, "Translation" delivers the most natural results.

Final Thoughts

The Reeflex Ultra Telephoto is an investment in "evergreen" gear. Unlike a smartphone, which follows a yearly upgrade cycle, high-quality glass maintains its utility over time. As smartphone sensors continue to improve, the output from this lens will only get better, providing a professional perspective that remains inaccessible to standard mobile hardware.

• Availability: The Ultra Telephoto is currently available via Kickstarter with early-bird offers. After the campaign, it will be available on the Reeflex store (use code EPIC10 for a 10% discount on everything available on the Reeflex Store).