Your question is very valid and it is difficult to find references to support the technology of camera.
Al Azhar academy though is renowned for its research in this area and has separated camera from drawing by referring camera as a tool to capture a particular moment rather than drawing.
As photo is real and as long as it is not photoshopped it can't be put into the category of drawing because drawing is fake and Allah will say to the man who made the drawing to give it life but as photo is real and man didn't create it but only captured it so many modern scholars excludes it from drawing.
Photographs can also be seen as similar to seeing reflection in a pond of water but only this time it is still and captured and I can only make this the core for discussion as camera was not available in ancient times. Maybe editing or adding anything to original photo might make these points weak.
Similarly many rigid scholars have also approved camera though they have only approved this technology due to the strict laws as photographs are used in every legal work and there is no other way so a person can take his/her photographs in such cases but in other cases these scholars recommend to play it safe by not using something which may cost our deeds as these scholars believe photographs are same as drawing.
Moreover photos of animals specially dogs should not be placed in homes and there is no flexibility in such case.
Finally, My own opinion is to try and play safe by using the technology when needed.