Cassandra is shooting a photo series in very low light. what kind of lens opening she needs if she wants a decent exposure? medium lens opening
micro lens opening
small lens opening
large lens opening

Photography has changed its subject matter quite a lot over the past few years. in the 1800's, it was considered normal for families to have  post mortem photos of their loved ones, and now that would be completely unacceptable. i think that photographers have always pushed boundaries and have been eager to capture everything, it is just society that changes their boundaries.

Over head or front lighting is used for a self portrait