Kodak Vision3 50D in Nizo Professional. Notching?

[mortron]

Maurizio I think you are right that it would be 64ASA in bulb. I thought
that this couldn't be possible, because then daylight film would need be switched to sun
and it would have the filter in the way causing the wrong colour balance. But you are
right because I forgot that the filter pin disengages the filter at each position.

So to clarify, if the Kodak 50D is notched for 64T/40D ASA, then to rate it at 40 the filter
switch will need to be switched to sun, and because it is daylight film (ie no filter notch)
then the 85 filter will be disengaged at both the sun and bulb position.

[S8 Booster]

a needed correction on this one - i now remember that this was correct but for the incorrectly notched V200T cartridge only. it had no notch to allow the daylight filter in/out select so whatever one did with the daylight filter lever the exposure meter would not move as it was continously disabled.

now, this is how it should work on the Nizo when a D cart is inserted. there should be no difference in exposure meter reading while operating the filter in/out knob. then at least this would be verified. when it comes to how it reads the 50D, due to its slider ISO read system it is capable of reading the 50 as 64 minus D/T lever actvation = ISO 40 - if Bauer did their homework right.

or you could verify it this way:

iirc - but this is long ago but i am pretty sure i observed it right on my 1014 xls - this was with a 200T cart which the cam sets to 160 at "T".
now, what i did was to move the daylight filter in and out while observing the exposure meter. now, the f stop reading was identical at both settings so it is up to the sensitivity of the film material to do the job. in this case it responds to 160 with no daylight filter and 100 with the 85 filter engaged.

Additional info / verification:

with the filter set to lamp/bulb position and activate the D lever in the cart compartment there should be no difference in the expsoure reading when the D lever in the cart compartment is pushed in/our.

or you could verify it this way:
if you take your cam and point it to a bright surface with the cart door open you may manually disengage the D filter tab in the cart compartment while taking an exposure reading in the cam. do this with and without the filter lever engaged (the outside knob) to either setting. this may reveal the nature of you Nizo (maybe with the filter set to lamp/bulb position and activate the D lever in the cart compartment there should be no difference in the expsoure reading when the D lever in the cart compartment is pushed in/our.

shoot....

[mortron]

There is a difference between the bulb and sun position with a daylight cartridge inserted on a Nizo - I have tested it.
I don't think this is how it usually works though. The 1014 XLS doesn't change with a daylight cartridge inserted.

This is why I asked before if it would be 64 on bulb and 40 on sun or if it would be 40 on bulb and 25 on sun.
Where I am getting the 40 and 25 from is I was thinking maybe because the filter pin is being depressed by the
daylight cartridge, this causes the camera to select the D rating in this case 40D (64T / 40D) even when set to bulb,
like the 1014XLS would for example, and when set to sun it goes to 25. I think it is most likely 64 and 40 though.