Densitometric tests uploaded. Home made densitometer.

Hello again, Ramiro. To add some legitimacy to Ramiro's machine, I've uploaded an old spreadsheet from when I was corresponding with Ramiro when he began looking into building his own densitometer. I notice that the spreadsheet was first created in 11/2002 and was compiled from sample negative strips that Ramiro sent me to run on my Macbeth TD920 as a confirmation of some of his initial baselines. I thought it was remarkably close in its very first version and certainly capable of doing one's own relative/relevant tests. The path to the comparision sheet is at:

http://www.chibardun.net/~craigclu/ramiro_B.xls

Nice going, Ramiro! I recall a few naysayers as you began this project but you stayed your course and I believe you've succeeded!

Hello Craig and forum:

Nice to meet you again. Thank you very much for encouraging me to do my densitometer. With your help, I think I have now a better machine. Yes, that were very early tests, I do not remember how I did that previous tests ¿Do you remember If I did them with the my densitometer, or using the hand held exposure meter.....I do not remember, I am getting old and the previous test were some time ago :-). I have been several months out of B&W busines but I am back again now. Also I changed from Windows to Linux and I lost your e-mail address. I have found a spreadsheet of our comparison and I send you the graph. Let me know if you remember the details of that test.

I am back again in photonet hearing this marvellous forum.

Hello, ramiro

What type of photocell did you use/ CdS? Silicon?

Thanks,

Jorge

Sorry for the typos, too quick a finger...

Hello, Ramiro

What type of photocell did you use? CdS? Silicon?

Pretty cool! what kind of photo-cell didi you use? what are those 2 resistors on the side of the meter? How did you calibrate it?

too many questions, may be you'd better email me the answers in spanish :)

Hi friends!

Sorry for delay, but lot of work this days. The sensor is a CdS photoresistor MORIRICA MKY 54 C348 I am drawing the schematics. I will announce here when I upload them to the WEB page. Any questions will be apreciated. Ramiro.

Tonight I draw the schematics, I think it is better to post it here instead of waiting to the WEB page. Here It is the simple and cheap densitometer. I will make mora drawings of the mechanics details. I hope you like it.

Ramiro,

I looked at your site. I saw only pictures of your densitometer. Will you also publish little description? I can't see where and how you place a film and maybe tehre are some more information which canc ome handy.
It is a great work and I like to make my copy of yours as well. Thank you!

Ok, let me some more time and I will make drawings showing more building datails. I hope you can do the densitometer without any effort. This is a prototipe, sure you can do it with diferent photoresistors. It is a matter of a bit of experimentation.

Ramiro.