1000 speed B&W? Hmmmm, I'm unfamiliar with that one. Is it of recent vintage? It's way too fast for ye Holga. If it's still good, I suspect all you will get is black pictures. You might make it work with a red 25 filter stuck over it's eyeball. That would bring it down to the neighborhood of ISO 320 or so. Still awfully fast for Holga in sunlight. You might get by, by pulling back on development. Developed in Rodinal 1:25, it ought to give grain the size of rocks.

You could use it at night with time exposure or multiple clicks, or use a flash that has an automatic setting, set for ISO 800. For flash work, Holga's aperture is f/8. Supposedly. Sounds like fun to me. :2yippee: