Hi. The Nizo has a light meter inside the viewfinder, which can be set automatically, or adjusted manually by the switch on the side of the camera. The camera lense can be adjusted to various metre/feet lengths ... and it's also possible to manually use the zoom. There are no settings for the ASA film being used. From reading your post, and the other ones on this page - which are very useful, it seems my best option is to select the bulb setting so the filter is off, and use one of the 85 filters when shooting outside. I'm assuming the filter inside the camera is an 85, but I don't know how clean it is. Saying that, the camera is in really good condition, and works well. I'd be really interested to know in what situations you'd use the different filters, and which are the good makes. As Wratten are made by Kodak, I guess that would be one brand to go for? Thanks again for your help.