Question 1
count sergei lvovich levitsky invented which of the following?
collodion process
digital imaging
dry plates
bellows camera

question 2
what substance was the first photograph made from?
bitumen
silver
lemon juice
acidic acid

question 3
the first commercially available digital camera was which of the following?

kodak dcs 100
kodak brownie
leica 1000
none of the above

1. Count Sergei Lvovich Levitsky invented the bellows camera. It is the oldest type of camera, resembling an accordion - you must have seen it in older movies. 2. The substance that the first photohraph was made from was bitumen. Bitumen is the material that asphalt in road construction is made of, but it served its purpose as the material for the first photograph as well. 3. The first commercially available digital camera was Kodak DCS 100, released in 1991, with a resolution of 1.3 megapixels. At the time, this was a cutting-edge technology, although, of course, nowadays far better cameras can be bought.