Starsky & Hutch tribute diorama, and the camera gear I need for close-ups

My 1:24 Starsky & Hutch alley is almost ready, but GoPro close-ups just don't cut it. Here's what I've learned about filming dioramas, and what I'm considering next.

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The 1:24 Starsky & Hutch tribute is nearly finished. There's just one problem: every time I push my GoPro in close, the footage turns soft and distorted. So this post is half build update, half call for help.

The build in detail

It's a gritty 1970s alley behind a hardware store, with the famous red-and-white 1976 Ford Gran Torino parked out back. Two resin figures of the detectives are still in grey primer. The street is cobblestone, littered with oil drums, wooden crates, a fire hydrant and an old newspaper, and warm LEDs light the shop from inside.

The Gran Torino parked in the alley at night, under the lit fire escape
The Torino parked out back, under the fire escape.
The alley behind the hardware store with the fire escape above the roller door
The alley behind the hardware store.

Why the GoPro struggles

Action cams use ultra-wide fisheye lenses. Up close, that bends straight lines, makes everything equally sharp and gives you no background blur at all. On a diorama, that means every speck of dust is as crisp as the figures, and nothing feels like a real street.

For miniature work you want a focal length of about 50 to 100 mm (full-frame equivalent), a fast aperture of f/2.8 or wider, and proper manual focus.

Oil drums on a wooden pallet next to a No Parking sign
Oil drums on a pallet, right next to the No Parking sign.
A rusty dumpster full of trash bags with graffiti on the side
The dumpster, full of trash bags and an old newspaper.

What I'm considering

The shortlist is all mirrorless: a Sony ZV-E10, a second-hand Fujifilm X-T30, or a Canon M50 with a cheap 35 mm prime. Whichever body it becomes, a 60 mm macro lens is on the list too. If you film miniatures, I'd love to hear what you use. Drop a comment under the video.

A red fire hydrant and a rusty drum on the corner of the alley
The fire hydrant on the corner of the alley.