Ricoh GR IV HDF - Compact Mirrorless Camera

RICOH GR IV HDF Digital Camera

Pure GR Performance with Creative Highlight Diffusion

The RICOH GR IV HDF builds on the iconic GR philosophy of image quality, speed, and mobility, introducing newly developed core components to push performance even further. Featuring a new APS-C CMOS sensor, a redesigned GR lens, and the latest GR ENGINE 7 processor, the GR IV delivers higher resolution, improved sensitivity, and faster responsiveness—while becoming even more compact.

The HDF (Highlight Diffusion Filter) version adds a powerful creative dimension, allowing photographers to instantly switch between the trademark crisp GR look and soft, cinematic images with gently diffused highlights. Designed for street, documentary, travel, and everyday snapshot photography, the GR IV HDF expands creative expression without sacrificing speed or portability.

Key Features at a Glance

• Newly developed 18.3mm F2.8 GR lens (28mm equivalent)

• 25.74MP APS-C CMOS sensor with rear illumination

• Latest GR ENGINE 7 image processor with acceleration unit

• ISO 100–204800 for extreme low-light performance

• 5-axis in-body image stabilisation with up to 6 stops of compensation

• Ultra-fast operation with approx. 0.6 sec start-up time

• Integrated Highlight Diffusion Filter (HDF) for soft, cinematic rendering

• 53GB internal memory for approx. 1,000 RAW images

• New 1800mAh DB-120 battery for approx. 250 shots

• Improved connectivity via the new GR WORLD app

• Compact magnesium-alloy body with redesigned controls

Super-Slim, High-Performance GR Lens

The GR IV HDF features a newly developed 18.3mm F2.8 lens, maintaining the classic 28mm-equivalent field of view that defines the GR series.
The optical construction of 7 elements in 5 groups, including aspherical and high-refractive, low-dispersion glass, delivers:

• High resolution from centre to edges

• Excellent contrast and colour fidelity

• Reduced distortion and chromatic aberration

• A slimmer overall camera body

This ensures consistently sharp, high-quality images in a truly pocketable form.

New Sensor, Processor & Acceleration Unit

At the heart of the GR IV HDF is a new rear-illuminated APS-C CMOS sensor paired with GR ENGINE 7 and RICOH’s proprietary acceleration unit. Together they provide:

• Approx. 25.74 megapixels of fine detail

• Improved signal-to-noise ratio

• Smooth tonal gradation

• Maximum sensitivity of ISO 204800

The acceleration unit optimises sensor data before processing, enabling exceptional image quality across a wide range of lighting conditions.

Advanced 5-Axis In-Body Stabilisation

The GR IV HDF incorporates a newly refined 5-axis SR (Shake Reduction) system, compensating for:

• Pitch, yaw, roll

• Horizontal and vertical shift (macro shooting)

With up to 6 stops of compensation in the image centre, camera shake is effectively reduced for both handheld shooting and close-up work.

Fastest GR Ever

Thanks to a redesigned lens barrel and optimised start-up sequence, the GR IV HDF achieves:

• Approx. 0.6-second start-up time (fastest in GR history)

• Faster macro-mode switching

• Quicker shutdown

• Improved autofocus speed and accuracy

Low-light AF performance and phase-detection accuracy have also been significantly improved.

Compact, Refined Body Design

The GR IV HDF body has been completely redesigned to enhance handling and usability:

• Slimmer magnesium-alloy construction

• Revised grip and thumb rest for secure one-handed use

• Repositioned buttons and dials

• ADJ lever replaced with a more intuitive control dial

• Durable, lightweight build for everyday carry

The shutter release button is finished in grey silver, visually distinguishing the HDF model.

Creative Exposure & Image Control

• Hyper Program mode for instant switching between aperture and shutter priority

• Depth of Field Priority (Sn) for emphasised subject separation

• Expanded Image Control system with Cinema Mode (Yellow & Green tints)

• Adjustable parameters including grain strength and size

• User-defined image control “recipes”

Highlight Diffusion Filter (HDF)

Exclusive to this model, RICOH’s HDF uses advanced inkjet-derived technology to:

• Diffuse highlights

• Create gentle edge blur

• Produce nostalgic, film-like rendering

The HDF can be toggled instantly via the Fn button, allowing seamless switching between:

• Classic GR sharpness

• Soft, cinematic visual expression

High-Visibility LCD Monitor

• 3.0" HD LCD with 1,037,000 dots

• Air-gap-free construction reduces reflections

• Excellent outdoor visibility

• Auto brightness adjustment based on ambient light

Connectivity & Workflow

• Dual Bluetooth® + Wi-Fi communication

• Compatible with the new GR WORLD app

• Image transfer, remote shooting, and location data sync

• USB-C with DisplayPort Alt Mode support

Additional Highlights

• Integrated 53GB internal memory (approx. 995 RAW / 3,500 JPEG L images)

• Crop modes: 35mm (15MP) and 50mm (7MP) equivalents

• In-camera RAW development

• Enhanced dust removal with anti-static coating

• Snap Focus modes and Full Press Snap shooting

Difference vs GR IV (Standard Version)

• HDF filter instead of ND filter

• Fn button defaults to HDF on/off

• Grey silver shutter release button for visual differentiation

What’s in the Box

• RICOH GR IV HDF Digital Camera

• Rechargeable Battery DB-120

• USB Cable I-USB198

• Hand Strap O-ST198

• Documentation

The RICOH GR IV HDF is a refined evolution of the GR concept—faster, more capable, and more expressive than ever. It remains a true photographer’s camera, combining uncompromising image quality with pocketable portability and instant creative control.