Hi Yirmeyaho, welcome. Glad you are here.
There are also a couple of member written tutorials about posting scans or photos. Just click on the Search button and look for scans or photos.
Stamps mostly come out better with a scanner for most folks. There re a few who have the skills to take great photos of stamps and I wish I was one of them.
You usually only need 75 ppi to 300 ppi resolution for am average stamp scan for internet display. A good one is at 600 ppi. Really examining the engraved stamps almost needs 1200 ppi.
To keep within board guide lines the scan needs to be 100kb in file size I think which is hard to do just scanning and posting so you also need to use the online photo resizing tool or do it yourself with your own photo editing software.
Stamps look best online on a dark or black background which means on a Vario stock page or similar or using a piece of black paper attached to your scanner top or just putting one over the stamps (carefully) when scanning.
Also I like to make long posts.

