I'll be getting some 120mm Fujichrome 64T this Monday for when I shoot at night. When shooting, I want to capture details in the shadows and have a brighter sky (so, long exposure). So I'm just wondering if there's a general area when shooting (shutter speed and aperture) that such can be done.
I also want to do the same shots with Portra 160NC.
Hope I'm not being too vague here.
For star trails you'll want a fast and also a fairly long lens. The ratio FL/aperture is the critical thing. For example the rz 110/2.8 or m645 80/1.9 or maybe the 200/2.8 are medium format lenses that I'd use for stars. You'll likely want to shoot a fast lens like these wide open, otherwise you won't have the sensitivity to get any but the largest magnitude stars.
Exposure... well let it go as long as you have time and patience for, if you don't have too many bright lights in the shot. With long exposures of the bare sky, the blues become gorgeous. My favourite 64T sky shots were ~4 hours. You'll need to watch out for light pollution- the crisp winter skies are perfect right now on many nights.
N.b. you can push 64T one stop if necessary. You'll see hardly any difference. I've done that with fireworks, works fine. In fact it'd not shock me to see a 2 stop push work out reasonably well with this film.
Do avail yourself of the reciprocity chart if you try to incorporate illuminated architecture at night. Sounds like you are using the older 64T? Not rtp2? Just be sure you have a reciprocity chart handy. The newer film had excellent reciprocity characteristics, but I nevertheless found myself getting into tens of minutes very quickly.
P.S. Nitpick: it's not 120mm film that you're getting, it's just "120." 120 is not a length or width.
