Film testing for EI and developing time, when one scans.

[peter k.]

I need some verification to a conclusion that I have reached.
I want to get a personal exposure Index and developing time for a new sheet film I am using.

Not having a traditional darkroom to print, I have to scan my images. I have checked the web and come across many examples and methods, but since I'm crossed between two formats, film, and digital, it seems I'm limited, and cannot really use them.

Scanning creates a wild card of its own, in being married to analog film. It has limitations, and is also very specific to the scanner that it is used. Therefore, it seems to be of the opinion, that there is no real method to do a tradition exposure Index and developing test. One just needs to go out and shoot, keeping track of exposure and efforts, the time in developing, and selecting what one likes the best.

Is this correct, or did I miss some new film testing sequence that is simple and affordable.
Thanks...

 

[mrred]

if you use vuescan, holding down the ctl key and moving the mouse over the scanned imaged with show the density on the bottom of the window. How accurate is this? I'm not touching it, but it is good enough for me.

So.. Dead Link Removed

If you just want to know if your development time is ok, measure base+fog on the film leader and then measure a shot with a grey card. Grey should be .70 + fog.

 

[peter k.]

Using SliverFast, but has the same thing.. have tried that in the past, and as you state how accurate is this... ha!!!

Your link, needs a traditional darkroom even the last practical method, needs a print.

 

[mrred]

The Densitometer Method

 

[peter k.]

yes, alas, that would simplify.
But no friends have one, there is no local lab, and rather spend the money on film. ;-)

 

[mrred]

I was referring to a section on the web page I gave reference to.

 

[peter k.]

Are you saying use the tool within the scanning program to determine the density?
Hmmm..They are referenced to each other, it makes no difference if its accurate or not, its the reference we want to compare.
Is this what you may be alluding to... ???

 

[mrred]

yes

 

[Alan Johnson]

I did enquire on DPUG but am not planning to do it till the cold weather returns.
I think one would need a step wedge and decide what gamma is wanted.
http://www.dpug.org/forums/f6/step-wedge-3529/

 

[mrred]

In this case, you only need a grey card.