I have been toying with the idea to try pinhole photography once again. I have a pretty large stash of 4x5 film both B&W and Color as well as a dozen or so film holders that are just not being used and I'm feeling guilty about that. Buy something new as guilt medicine...shoulda thought of that before.
At any rate I purchased a ZeroImage camera. It's more expensive than others but it's just so darn pretty.
The iPhone has an App, Light Meter that is just that, a light meter. The App is free and for 99 cents I get a larger, ad free screen. The App is quite sophisticated with lots of options. The camera has a 183 f stop pinhole and the App has a setting for 181.