Digital Reciprocity Failure Charts
Jan 18, 2019 09:13:52 #
Jan 18, 2019 09:19:16 #
jerryc41 wrote:
I got an email from a diplomat in Nigeria who is selling them for $24.99 each, and they have a Lifetime Guarantee!
I think it comes as an add on option with Arsenal.
Jan 18, 2019 09:21:49 #
Shutterbug57 wrote:
Nope, its satirical. I thought I would add a little levity to the group.
Thanks for the silliness!
Jan 18, 2019 09:32:02 #
Guyserman
Loc: Benton, AR
jerryc41 wrote:
Well, you're almost right. Digital works with 1s and 0s. Dividing by 1 would get you what you started with. What you must do is divide by zero! As any good mathematician knows, there is something magical about dividing by zero. 
Jan 18, 2019 09:36:17 #
Shutterbug57 wrote:
Following up on the satirical “Adding Auto ISO Is Still Manual” thread, can someone point me to the reciprocity failure charts for Nikon, Canon, Sony & Fuji digital cameras?
For digital "reciprocity" try multiplying by the square root of negative 1 or "i". Notice Pentax and Leica have no non-linear exposure curves!
Jan 18, 2019 09:49:07 #
Zero??? What is ONE divided by ZERO? Is TEN divided by ZERO bigger than ONE divided by ZERO?? Now the BIG question. How far is it from here to infinity? Think about it. Zero? Or Infinity?? How about the REAL answer. Twice the distance halfway back. That's IT Charlie Brown!!!!
Jan 18, 2019 09:58:46 #
Shutterbug57 wrote:
Following up on the satirical “Adding Auto ISO Is Still Manual” thread, can someone point me to the reciprocity failure charts for Nikon, Canon, Sony & Fuji digital cameras?
On the serious side, after having shot digital exclusively for many years I had kind of forgotten a few details about film photography. I was trying yet again to photograph a bell pepper (per Weston) with my 4x5" wooden field camera. Yikes, I had, I thought a 45 second exposure figuring in bellows extension, but had forgotten reciprocity for the B&W film I was using. Got massively under exposed. The actual corrected exposure should have been more like 2.75 or more minutes! Live, and re-learn. LOL
Jan 18, 2019 10:05:47 #
olemikey
Loc: 6 mile creek, Spacecoast Florida
Shutterbug57 wrote:
Nope, its satirical. I thought I would add a little levity to the group.
He's a naughty boy, got two pages out of it so far!!! Good shot.
Jan 18, 2019 10:32:43 #
In high school, (when we were still using slide rules on a regular basis -- some Pickett users even had a cool leather case so they could hang theirs on their belt) our math department had somehow acquired a very large, very expensive electro-mechanical calculator. In the classroom in which it was set up, the only convenient place to put it was on a counter very near the door. At least once per year, someone would have it divide by zero on their way out of the classroom at the end of class. The only solution was to unplug it and call a repairman to reset it internally. Maybe we need to be reset internally to accommodate the changes in the move to digital.
Jan 18, 2019 11:26:51 #
BartHx wrote:
In high school, (when we were still using slide ru... (show quote)
I remember doing something like that back around 1970. I divided something by something and got the thing counting up one number at a time. I think it went out to something like 12 places. After watching it for a while I was able to calculate that it would take several years to count up all the way. Don't remember how I got it reset, just too long ago.
Jan 18, 2019 11:41:04 #
Reciprocity failure is dealt with, in some detail, in the Wikipedia article entitled Reciprocity "(Photography)."
Jan 18, 2019 12:00:28 #
Strodav
Loc: Houston, Tx
larryepage wrote:
But if the number you are dividing by zero is also zero, then you can do it, and you can get a real number. It is a lot more fun to multiply zero by infinity.
Since 1/1 = 1, 2/2 = 1, 3/3 = 1 ... , so is 0 / 0 = 1 ?
Jan 18, 2019 12:35:50 #
Jan 18, 2019 12:58:21 #
nadelewitz
Loc: Ithaca NY
Shutterbug57 wrote:
Following up on the satirical “Adding Auto ISO Is Still Manual” thread, can someone point me to the reciprocity failure charts for Nikon, Canon, Sony & Fuji digital cameras?
Funny, I was researching this subject just the other day.
After reading several article on the subject, the conclusion is that digital cameras DO NOT exhibit reciprocity failure as film does, period.
Reciprocity failure was/is a film phenomenon, due to silver halide particles requiring a minimum amount of illumination to initiate the chemical change in them.
Here's one of the links I read...https://photo.stackexchange.com/questions/37241/does-reciprocity-failure-schwarzschild-effect-exist-in-digital-photography
Research this yourself.
Jan 18, 2019 13:10:08 #
larryepage
Loc: North Texas area
Strodav wrote:
Since 1/1 = 1, 2/2 = 1, 3/3 = 1 ... , so is 0 / 0 = 1 ?
Zero divided by anything is zero. But anything divided by zero is infinitely large. So you have to have more information before you can answer that question. It involves limits and derivatives. Kind of fun, really. But it requires more than algebra to figure it out.
If you want to reply, then register here. Registration is free and your account is created instantly, so you can post right away.