TOMLOV TM4K-AF Max 4K Autofocus Microscope: features, specs and who it suits

The TOMLOV TM4K-AF Max is a digital microscope with a built-in 10.1-inch screen. It shows a magnified live image of the work in front of it, so you don't have to squint into an eyepiece. TOMLOV designs it for electronics repair and micro soldering, and also for coin inspection, jewellery and teaching.

Autofocus with distance sensing

Focusing by hand is a slow job at high magnification, because the depth of field gets very shallow. TOMLOV says the TM4K-AF Max combines TOF (time-of-flight) distance sensing with AI autofocus for hands-free focusing. In general, a TOF sensor measures how far away the subject is, and the system adjusts the lens to match. That can help when you keep lifting and moving a circuit board.

4K video and the 10.1-inch screen

The microscope records 4K UHD video and takes 52MP images, according to the brand. The built-in screen is a 10.1-inch IPS panel at 1280 x 800. The listing quotes 100% sRGB, 99% RGB, 400 HDR and 99% NTSC colour figures. Note the difference: the camera captures in 4K, but the built-in screen's own resolution is lower, so full detail shows on an external 4K display or in saved files.

Magnification

TOMLOV lists a zoom of 2X to 2000X. As with most digital microscopes, that figure depends on screen size and digital zoom, and is not a measure of optical resolving power, so treat the top end as digital enlargement. The listing also mentions 4x digital magnification with a thumbnail function, a locate feature to help you find your place, and 8 customizable grid lines for lining up solder work.

Outputs and controller

It supports simultaneous HDMI and USB output, described as a tri-screen real-time display, so the image can appear on the built-in screen and on other screens. A controller lets you take photos, record video and zoom without touching the display, which helps keep the picture steady. A 64GB SD card is included for recording.

Stand and lighting

A 360° spin arm gives rotation and horizontal adjustment. The 13-inch pillar gives working height, and a 4-inch fine-tuning stand allows small adjustments. The ring light is meant to illuminate the work evenly. The unit measures about 17.7 x 15.0 x 6.7 inches and weighs 5 lb.

Who it suits

• Electronics repairers and hobbyists doing micro soldering.
• Collectors who examine coins, including error coins, stamps or jewellery.
• Classrooms and labs that want a shared, on-screen view.
• Timepiece repairers needing a large, steady picture.

What to check before you buy

• Working distance: check the manual for the distance between lens and work, which affects room for tools.
• Desk space: the stand needs a stable surface of around 17 x 15 inches.
• Display: if you want to see the full 4K image, you will need an HDMI display.
• Power: check what the unit and ring light need.
• Latency: screen delay can affect fine soldering; read the manual.
• What's in the box: confirm the controller, SD card and cables.

The short version

• A 4K, 52MP digital microscope with TOF and AI autofocus.
• Built-in 10.1-inch IPS screen (1280 x 800), plus HDMI and USB output.
• 2X to 2000X listed zoom, ring light, grid lines and thumbnail function.
• Spin arm with a 13-inch pillar and a fine-tuning stand.
• Includes a controller and a 64GB SD card.

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