Sven Schroder
14-May-2005, 04:15
Hello All
Similar to the f9 computar does the kowa go to f6.8 in a shutter? in looking at the barrel the f9 setting is 5mm smaller than the pupil of the elements; so more glass should mean more light?
I have the 305 and matching copal 3 s (early one came with a commercial astragon) the existing scale is for f6.8 360 , measuring and comparing the kowa barrel and the shutter the apertures match only third of a stop more in the shutter (with a spotmeter on a light box).
Can I use this scale? are scales available for the early copal 3 the ones with the different colours on the levers i.e red on the cocking lever, green on the aperture.
I am aware of the sevice workshops you have in the US, here in the UK thats something we lack or can anyone recommend a UK solution.
I'll be making some test shots later in the coming week(looks great on the ground glass), so theories can be tested and thanks in advance (and for the knowledge I have gained from this forum).
Sven
Similar to the f9 computar does the kowa go to f6.8 in a shutter? in looking at the barrel the f9 setting is 5mm smaller than the pupil of the elements; so more glass should mean more light?
I have the 305 and matching copal 3 s (early one came with a commercial astragon) the existing scale is for f6.8 360 , measuring and comparing the kowa barrel and the shutter the apertures match only third of a stop more in the shutter (with a spotmeter on a light box).
Can I use this scale? are scales available for the early copal 3 the ones with the different colours on the levers i.e red on the cocking lever, green on the aperture.
I am aware of the sevice workshops you have in the US, here in the UK thats something we lack or can anyone recommend a UK solution.
I'll be making some test shots later in the coming week(looks great on the ground glass), so theories can be tested and thanks in advance (and for the knowledge I have gained from this forum).
Sven