Diapositivo
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I would avoid cheap light meters, especially selenium ones, such as the Gossen Sixtino II I have, as they tend to be quite unreliable and flirt with uselessness.
Lots of technical and theory stuff in this thread. However, I have happily used Weston (Selenium) meters for over 40 years to good effect and will remain so. They are (now) very cheap, suit my needs and respond to light the same as B&W film.
You should also consider whether you plan to use the light meter in low light conditions.
No meter can be accurate at low light levels because you need to accommodate for reciprocity. For all my city night photography, I use the Weston to meter the brightest highlight, place it on Zone VIII and then apply the reciprocity factor. Using this method, I have never had a (technically) dud image.
For cheap meters I mean meters which were cheap in their own time. Good "professional" meters which are now cheap are exactly what I suggest to buy.
Reciprocity is maintained by certain films (such as Fuji Astia) even at 1 minute exposure. Some selenium light meters don't go below EV4 @ 100 ISO. Between EV4 @ 100 ISO an EV 0 @ 100 ISO there's a lot of difference. With 100 ISO, EV0 means 4 seconds at f/2 which can well be within the normal reciprocity behaviour. The same light level with 400 ISO yields 1 second @ f/2.
In any case, you have to have a measure to "accommodate" for reciprocity. Your assumption that placing the highlights in Zone VIII is enough presumes you are in a position when you can actually use your light meter so as to meter "zone VIII". In a dark church where Zone VIII is a very dark cloud on a roof painting lighted by high windows it's not easy to move the light meter to measure "zone VIII".
Your point that light meters are not accurate in low lights because film suffer from reciprocity does not make much sense here. Precision of a light meter has nothing to do with reciprocity of a film. You start from a measure given by the light meter, and then you "do the math" for reciprocity defect if need be, and that depends from your film and the couple you are using. A light meter which does not read in low light simply does not give you a measure to start with.
So I agree with you: lots of theory in this thread

To the OP I repeat that better light meter specifications never go wasted.
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