Densitometry light source

removedacct3 · Sep 15, 2019

For those who test their own film using densitometry: what kind of light source do you use?

I'm using a Agfa D102 densitometer to test my film. Currently I'm using a USB-powered led drawing panel, but it does not nearly deliver the minimum output of 2500 lux as recommended by Agfa. Hence my search for a decent replacement without breaking the bank.

Any suggestions?

AgX · Sep 15, 2019

Consider the spectral output too.

removedacct3 · Sep 15, 2019

AgX said:
Consider the spectral output too.

Yes, that is something to take into consideration as well especially since I am using a staining developer (Hypercat) as my default developer for low and medium speed films.

ic-racer · Sep 15, 2019

https://www.photrio.com/forum/threads/the-great-sensitometer-shootout.95837/

RalphLambrecht · Sep 15, 2019

MrclSchprs said:
For those who test their own film using densitometry: what kind of light source do you use?

I'm using a Agfa D102 densitometer to test my film. Currently I'm using a USB-powered led drawing panel, but it does not nearly deliver the minimum output of 2500 lux as recommended by Agfa. Hence my search for a decent replacement without breaking the bank.

Any suggestions?

my current densitometer(Heiland)has a built-in light source but when I used the Agfa I used a light table with 40 W Neon bulbs(warm-white).

Chan Tran · Sep 15, 2019

I am not sure but I simply use a densitometer. For B&W I don't think the color temperature of the light source is very important.

RalphLambrecht · Sep 19, 2019

Chan Tran said:
I am not sure but I simply use a densitometer. For B&W I don't think the color temperature of the light source is very important.

+1

removedacct3 · Sep 19, 2019

If I am able to meter the various densities of a Stouffer 35mm step wedge with my Agfa D102 - not sure if the width of the bars on the step wedge allow a meter reading with D102's sensor as they might be too narrow - I was thinking to use a led floodlight and a opal perspex sheet as diffuser. If it works out it is a clean, simple and fairly inexpensive answer to my question.

AgX · Sep 19, 2019

Chan Tran said:
I am not sure but I simply use a densitometer. For B&W I don't think the color temperature of the light source is very important.

In B&W staining developers are used too (especially in the US).

Densitometry light source

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