All were shot with Kodak HIE (High Speed Infrared) film.
I used a technique known as "between the film rails" filtration. I cut an 89B gelatin filter and taped in the film channel between the shutter and the film. I also taped a semi-reflective covering (the silvery lining that Kodak Wratten filters come in) to the film pressure plate. This covering supposedly allows the use of a higher ISO due to "re-exposure" of light being reflected back onto the film. (I'm not sure of the science of this but the film was nicely exposed.)
This method always for easy TTL metering (at ~ISO 320) and eliminates possible vignetting when using the 30mm lens. The drawbacks are dust on the filter will show on the film since the filter and film are a virtual contact print, and, worse, scratches. Many rolls of the film I shot had horizontal scratches running the length of the film. See the image of the building -- those black lines in the sky are not phone wires... they are scratches. This fly in the ointment of TTFR filtration is a good reason to discontinue this method...