Small to medium will work   It will just take more gears for the same speed.
If you end up wanting to buy some gears I got most of my gears from some of these- http://www.klutz.com/book/Lego-Crazy-Ac … ntraptions (you can also buy the parts without the book for less money)

Last edited by END films (January 4, 2014 (12:42pm))

That's half the reason, the other half is to turn a large, easy to measure unit of movement (like a full turn of a crank) into a really small amount of movement.
About gear sizes, a larger gear makes the process require less gears over all (ie. a small gear turning a big gear instead of a small gear turning a medium gear which is on the same axle as another small gear that is turning another medium gear for about  the same amount of reduced speed)- If that was too confusing look at the picture in "The Build" section while reading it.
About your rig it will do the tasks mentioned above but strength increasing and speed reduction isn't a whole lot but it will make things easier than no rig.

Thanks , for your post END films,but i have a little question :
You said :

Can I make a Dolly Rig that can also make a move upwards and downwards
If yes, how can I do it?

Probably, I have a few ideas for a up/down rig but that's still a work in progress I will probably post about it if/when I succeed. If you have a tripod that has a crank on the side to raise and lower the top you can try that instead.

Those dolly shots came out great, Pritchard! I meant to say something about those upon the release of your film.

If it's not too much trouble, I think those pictures might come in handy

For up/down movements, I just use a modified version of BiM member David Boddy's camera rig, pictures of which are on Brickshelf, which is down at the moment. But he shows his rig in his THACumentary for THAC 7, so you can check that out if you want. It's a great rig, and is useful for all sorts of movements.

Last edited by Mighty Wanderer (January 5, 2014 (01:59pm))

If you watch ANP's guide it also shows a rig that moves his camera (a DSLR) up and down. It's basically the same sort of rig Endfilms uses, but erected.

I made a dolly rig based on yours End films, but I didn't have such large gears, so I used a size smaller ones. The rig works fine, but isn't as slow as your version. The ratio is something like 1:200. I'll try to slow it down a bit more using a few more gears.

Twist the gears, the bricks with holes then twist up or down, and the camera's platform goes up/down...Sorta. It also moves forward/back, so it's better for zooming while elevating than straight panning. I guess it's what END called "Arcing" which is not what ya'll are wanting. It's not too bad going down, but can't smoothly go up at all. And I don't have that many big and small gears, so it has to make due with a lot of medium sized ones.

It's the same principal, but not near as refined as David Boddy's rig. Sure wish I had seen that first.

Ironically, with my FTC video, I used a very makeshift rig for the dolly shots:

Here's another one, which allows for panning and dollying:

2nd place Darkness and Light entry: The Tree
Behind the Scenes