Micro Four Nerds listed the top 10 tiny cameras:

• Lumix GX80 / GX85 – Chosen for its compact size, 5-axis IBIS and surprisingly good 4K quality. A great cheap hybrid starter camera.
• Sony RX100 V – Ultra-pocketable with excellent autofocus and great 4K (short clips only before overheating). A tiny but capable daily carry.
• Z Cam E1 – Weird but fun “sensor in a box.” Interchangeable lenses, 4K, Z-Log, and tiny size. Great for creative video snippets.
• Panasonic Lumix G100 – Mis-marketed as a vlogging cam, but actually great behind the camera. Tiny, light, stabilized with OIS lenses, good EVF, mic input.
• Canon PowerShot V10 – Modern, compact, video-focused camera with excellent built-in mics, internal ND filters, great touchscreen, long recording without overheating.
• Caira – MagSafe micro four thirds “smart-camera” module for iPhone users. Great IQ, unique form factor, AI tricks, and easy instant sharing.
• OM System OM-5 / OM-5 Mark II – Great photography camera with industry-leading IBIS and PDAF. Weather-sealed and tiny. Video is only 8-bit, but fine for small clips.
• Sony ZV-1 Mark II – Pocketable hybrid with strong video features and good AF. Weak stabilization due to no optical IS, but still a solid small video/photo option.
• Insta360 Ace Pro 2 – An action camera transformed into a “real” camera with the Explorer Grip. Excellent video, good 50MP photos, top stabilization, great audio.
• Panasonic Lumix LX15 / LX10 – A tiny classic with a fast f/1.4 Leica lens, great 4K, strong stabilization, flip screen, and truly pocketable size.

Final Note: These cameras all balance size, image quality, and video capability — but the Lumix LX15/LX10 and Canon PowerShot V10 stand out as her personal favorites for everyday video clips.

He concludes:

After a month of intensive testing, this new OM System lens proves to be one of the most versatile and high-quality telephoto zooms in the Micro Four Thirds ecosystem. It delivers exceptional optical performance, fast autofocus, and superb stabilization — even when paired with 1.4x or 2.0x teleconverters.

Ideal for birders, wildlife photographers, macro enthusiasts, and astrophotographers, the 50–200mm f/2.8 offers an effective 100–400mm range (up to 800mm with 2.0x TC), all in a lightweight and weather-sealed body.

Whether you’re shooting songbirds, moon landscapes, or even comets, this lens delivers. It’s a strong contender to become the go-to pro zoom in the OM lineup — possibly even replacing the legendary 40–150mm f/2.8 for many users.

OM 50-200mm f/2.8 PRO at BHphoto, Amazon, Adorama, OM US store, Fotokoch, Foto Erhardt, Calumet, WexUK, Clifton, OM European stores.