Let's say I start a blog about telescopes, binoculars and similar items. Most of the post would be news and reviews, also some tutorials. It's only logical that if you review or post news about a telescope let's say, you will want to include a picture or two of it. And this is where I am unsure how to go about that.
Can I just save the pictures from the vendor's website and include it into my post (referring back to the original website of course, in the form of website name and url under the included photo)?
Or is it better if instead of downloading the picture, I place an image tag into the post that displays the picture directly from the original website? This way I won't have to download it, but there could be other issues, like if the owner ever decides to remove the picture my blog will get messed up because the pictures won't display anymore.
Or will I have to negotiate with the owner of the site where I wish to include pictures from into my blog on each instant?
There are a lot of blog out there about gadget, consumer electronics and the like, with pictures in the posts. How do they do it?