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John: Please look at this site - it has very good and useful information for you.

http://www.fredparker.com/ultexp1.htm

My understanding is that the sun is a consistant, known light source.

Also that on a bright sunny day that the LV is 15 which matches with EV 15 on the pentax spotmeter.

Therefore, a grey card...

Doesn't everyone find Little Danny Smith amusing? He must be one cool character- so intellectual and full of pertinent information! I know we all appreciate his sharing with us...

Oh, by the way,...

I posted this on another forum, but I think I will have more informative responses here:

Is pushing a film beyond its true speed just a delusion?

I, for one, suspect it is!

An emulsion has a...

This question has come up before, but I’ve never seen it actually answered properly. The replies usually go off into never-never land on one tangent or another, concerning the environmental concerns...

That was hilarious!

Dee: Thanks for the good info! I think I am going to have to try to fix it myself as you described.

Something is indeed keeping the button from coming out and locking the needle down. I suspect...

I posted elsewhere on the net, but thought I'd have good luck here.

I have a Weston Master 6 model 560 that seems to be stuck on. Just noticed this a day or so ago - usually you have to push the...

Eric: How about posting details of your procedure? The link you gave indicates one must "order and pay" for the information. An impoverished photographer trying to make his own ground glass is not ...