I'm a new photographer, and I'm trying to take photos of a product with a pure white background (#ffffff). I'm using a light box (something like this one), so my lighting should be solid.
But I can't seem to find the right settings for a good photo. I've taken lots of photos (100+), with a lot of different settings and basically my photos are either overexposed, or the background is not white. Here are some examples:
The product is great on this photo. Only the background is WAY to grey.
f/8 -- 1/2000 sec -- ISO-6400
The background is pure white. But the product is overexposed.
f/8 -- 1/320 -- ISO-6400
3. Too grey and the product is overexposed
f/22 -- 1/200 -- ISO/128000
My question is: how do I find the right settings?
UPDATE: Thanks for all the great responses, I really appreciate it. I've made some more photos with a lower ISO (200) and higher F-stop. Here some more results;
4. Good background. Bad product.
f/22 -- 0.62 sec -- ISO-200
5. Almost perfect. Background is a little too grey, and product a little too bright.
f/22 -- 1/3 sec -- ISO-200
6. Almost perfect. Product is even better. Background is worse.
f/22 -- 1/5 sec -- ISO-200
7. Getting very close to an end result I'm satisfied with. By the suggestion of Matt Grum I've blacked out some parts in the light tent. This shot above is not perfect, but I do not have paper to black out the tent better. I assume when I do, I can get that perfect photo.
f/8 -- 1/20 sec -- ISO-200
For reference, here is how I'm doing it atm (with the front panel closed):