I was reading about working principles of exposure meters and got little confused. Everywhere they talk about 18% gray value but no one described what they...
Some links for you to visit http://www.goshen.edu/~marvinpb/graycd.html http://www.kodak.com/US/en/motion/products/tools/card.shtml This one thrown in as they...
A value reflecting 18% of the light incident on it. Raju wrote: I was reading about working principles of exposure meters and got little confused. Everywhere...
I do not know whether Kodak still makes 18% gray cards but in the past they sold such cards. They are 18% of white, and I assume 18% of diffuse white. (Not...
R. Mueller
r.mueller@...
Feb 3, 2006 9:33 am
1062
As I understand it, a properly made 18% gray card reflects 18% of the light striking it. This may not be a semantically correct statement. I admit the science...
You are correct about the deinition of 18% except this problem of light distribution. A really rough, where the roughness is highly random and fairly...
R. Mueller
r.mueller@...
Feb 5, 2006 7:31 pm
1064
... past they ... http://www.amazon.com/gp/product/B00009R838/sr=1- 1/qid=1139170694/ref=pd_bbs_1/103-8554781-5007829?%5Fencoding=UTF8...
18% Gray is used because it reflects the same amount of light that falls on it. Reflected meters and meters inside cameras are designed to read reflected...
18% cannot mean it "... because it reflects the same amount of light that falls on it...". Light is lost by the absorption of (100% - 18 %). Furthermore,...
R. Mueller
r.mueller@...
Feb 6, 2006 3:04 pm
1068
Just a little to stir the pot.Years ago I worked as a tech on Semi pro TV ($12,000.oo range)cameras manufactured by a large well known Japanese company.While...
I believe skin tones are more reflective than 18 % gray, by roughly a factor of two, but that makes assumptions about whose skin and whether the person is...
R. Mueller
r.mueller@...
Feb 6, 2006 10:32 pm
1070
Hi All I have old Calumet 4x5, like this one http://i9.ebayimg.com/01/i/06/18/f9/99_1.JPG with looong about 26inches rail. but i need something about 12. I...
This camera was sold with, if I remember correctly, 3 different rail lengths. You have the longest of the three. I have the same rail and it gets in the way....
I don't know what the availability is for the different lengths on the auction site but there is no reason that you can't use aluminum. The tubing is extremely...
Yes, you could use aluminum tubing. I still would not advise it on this camera. The camera in question is heavy like a truck so the aluminum would offer no...
With all that Matt said about these cameras yes he is right. Aluminum does scratch easily and has to have bushings slide on unless you don't care it gets...
That's hysterical. There was actually a very funny bit on the Chappelle show about UN weapons inspectors finding aluminum tubes. I was thinking of that wile I...
I've two questions. Via ebay i got a siberian slobs 13x18cm wooden camera. More defects than I've got fingers, but good looking lens and bellows. One shutter...
Interesting ideas, so I will do a little speculation! To Q1- I never heard about carbon fiber sheet. Where can one buy it? How bad are the prices? (And...
R. Mueller
r.mueller@...
Feb 10, 2006 12:10 am
1081
... buy .it? How bad are the prices? (And what is the problem with UPS? Way back I dealt with them and the company was then superior to USPS. I am...
I think the disappointing accomplishments of the past reveal some pretty steep obstacles to such a shutter with blades. Examples: Old #5 Ilex or Ilex...
... Much Thanks Murray L. and R. Mueller , I was pretty sure my efforts will result mostly in frustration. But I look at the springs in the large shutters I...
One small tip: If you try boosting speeds (by looking at an existing shutter and building a faster one with a similar construction but better springs) please...
R. Mueller
r.mueller@...
Feb 10, 2006 11:28 am
1085
I am in Canada.Ordered 6 springs from Indianacost $60.00 + shipping. Asked how to be shipped. Replied SURFACE.(USPS????) Three days later UPS Knocks at the...
I'm told UPS dings additional for 'residential delivery' so I as buyer get to pay that. Then, the smiling crap act that they are, I have to drive to their...
Had the same prob with ups but it was the seller's fault. I ordered an HDD for my laptop at tigerdirect.ca. I've been billed in CAD $, payed TPS/TVQ and UPS...
Having problems with message search?
Fill out this form to ensure your group is one of the first to be migrated to the new message search system.
