Many moons ago I started my love affair with large format in 8x10 and larger, but found with my old brass barrel lenses such as derogy, jamin, darlot and the like, I was restricted to indoors. The xray film I use I normally rate at about 80 to 100 ISO, which is fine under artificial lighting and exposure times of a second or more. All of my old cameras are 10x12 or larger, so exposure times are sometimes multiples of 4 with bellows factor, depending on subject distances when doing studio portraits or table top, so a lens cap was adequate.
Crossing that line into landscape became a challenge, I used a Vageeswari 10x12 camera normally with a Ross 16 inch petzval lens. I couldn't rely on bellows factor to slow the exposure down to lens cap speed, as most shots were at infinity and there was no bellows factor.
My favourite studio camera was a Deardorff 11x14, so I had made all of my lens boards to fit the deardorff, any camera I had purchased after, I adapted the lens board holder to fit the big deardorff lens boards.
I bought an old graflex 4x5 with a working focal plane shutter, which of course has shutter speeds up to 1000th of a second. I cut the box in half saving just what I needed to keep the shutter mechanism intact, and adapted the shutter end to fit on the front of my cameras. I then adapted the front, minus bellows, to accept a deardorff lens board.
So now I can confidently take my wonderful lenses out into the sunshine and shoot 8x10 and larger at whatever speed is required.
There are alternatives without having to resort to Packard shutters.