Bob, An interesting thread, and I've been lurking my way through it from the beginning. The only way I've found to keep track of the actual shutter clicks is to keep a written log somewhere, and who has the time or the presence of mind when you're in the "heat of battle" to do that. I am known in my circle of photog acquaintances for taking a huge number of shots when I'm in the field. I went to Yellowstone for a week of winter photography (pre-digital) and was in the field for five days. I came home with 42 rolls of film, which was pretty normal for me. Everyone else on that trip had less than half that....
I gave up trying to count the clicks when I upgraded to the 1Ds... it rolls over at 9,999 anyway, and then you lose track. An intriguing thing to think about, but why should we bother doing this? To show the age of the shutter mechanism? Or just as a curiosity. Congratulations on finding that piece of heaven called "retirement". Wish I could say the same. Jane > Tom, > > After reading this thread and doing some digging I have comments about > the image numbering when changing CF cards. > > Here is what I find and think I understand. There is a Lithium CR2016 > in the 20D that helps keep, among other things, the number of the last > image shot. This number is stored somewhere in the camera's logic. > (Logic is a long time term for the circuitry) When a CF card is > installed and everything is ready to take the picture, the firmware > reads the number on the CF card and compares it with the stored number. > If the CF card has a lower number the stored number is used. If the CF > card has a higher number, that number is used. In either case the number > is written to the CF card along with the image and the number in the > camera is increased. This is why when you put a freshly formatted, or a > brand new, CF card in the 20D the image numbering doesn't get lost. I > think the only difference between a freshly formatted card and one from > another camera that has a number on it that is not in the sequence is > that you'll have a messed up numbering scheme with the way out of > sequence card. > > All this makes me think that the answer to my original question, is the > IMG_nnnn a reliable indicator of total shutter activations, is no, not > really. It doesn't take into consideration the number of shots with no > CF card if you choose to override the no card thing or the accidental CF > card swap you mentioned. Then there is the ability to manually reset > the count and the resulting "accounting" chore of remembering the number > everytime. And it is possible to accidentally reset the counter to 0000. > > This has been an interesting thread and I'm glad that I had time to dig > since I'm finally retired and its too cold to run around outside. > > Oh, and for those interested, the CR 2016 is located near the main > battery under the battery cover. > > Bob > > Bob > > > -- > > ///// > ( O O ) > --------------------oOOO-----O----OOOo-----73 de [EMAIL PROTECTED] > I plan to live forever. So far so good........... ____________________________________________________________________________________ Food fight? Enjoy some healthy debate in the Yahoo! Answers Food & Drink Q&A. http://answers.yahoo.com/dir/?link=list&sid=396545367 * **** ******* *********************************************************** * For list instructions, including unsubscribe, see: * http://www.a1.nl/phomepag/markerink/eos_list.htm ***********************************************************
