How is the field of view clipped in SLR Cameras
What is crop factor and how does it relate to focal length?
My reputation rating on SO took this hit an hour ago, and it is due to what appears to be the simultaneous deletion of multiple questions.  I am uncertain why it happened, am concerned, and would appreciate an explanation.  Going to  shows that it was removed due to moderation.  Was a script run deliberately, or were we hit with a question deletion attack; what happened?  -12     today -2  1 hour ago  removed     How to send a 2d Vector over UDP in c++ -2  1 hour ago  removed     How do I use the Eclipse debugger to debug a Java application? -2  1 hour ago  removed     PHP string error; inconsistency with local and server -2  1 hour ago  removed     Unable to start the MySQL service after a server migration -2  1 hour ago  removed     How to use Java to print a text file on a ticket printer? -2  1 hour ago  removed     How can all of the ZBrush Obj files be imported to make a complete model? How do I change the default wifi network that Ubuntu connects to on startup? There is an unsecured public wifi network in my range, as well as my own home WPA secured wifi that I want to use by default. However, on startup Ubuntu always connects to the unsecured one. Sometimes I forget to reconnect to the other one, which is very dangerous.   I am running a default setup of Ubuntu Destkop 11.10 with Gnome 3. I have looked under network settings but I can't find a 'default' option. I understand using phone while it is being charged by a normal charger is not advised. What about using phone while it is being charged by a portable charger (powerbank)?  I own a HTC one and i was told by a mobile technician HTC’s own portable charger only should be used for HTC one. How much truth is there to it as HTC powerbank is not available in my city and i am thinking of using Sony portable charger for charging my HTC One? In , someone suggested in a  that I should not cast the result of malloc. i.e., I should do this: int *sieve = malloc(sizeof(int) * length);  rather than: int *sieve = (int *) malloc(sizeof(int) * length);  Why would this be the case? What is the best base to use? $x^{x^{x^{\dots}}}=2$, what is the value of $x$? I came up with this little simple exercise, stating:  $x^{x^{x^{\dots}}}$ infinite times is equal to $2$, find $x$.   As we're dealing with infinity, we can just separate the first $x$ and get $x^2=2 \implies x=\sqrt2$  But then I thought what if we change $2$ to $4$? Now we get $x^4=4 \implies x=\sqrt[4]4=\sqrt2$  Something went wrong, can someone explain? I am working on a game and would like to include a few jump scares. So here is a rather simple question — What makes a good jump scare and when and how should they happen? After upgrade of any app - apps move back from SD Card to phone memory.  After that, to save phone memory, I have to move upgraded app back to SD card.   Is any possibility to avoid this because it is very annoying?  I have Android 5.0.2 on Motorola E second gen phone. There was a book (it actually had a second book as well) where a guy gets paid with a group of others to go to a planet that is enclosed in a metallic sphere.   There are many species in this planet. I don't recall if they actually met the races in the first or the second book but there an incident where an alien in the first book ate fruit from a tree that removed any signs of gender from it. I read recently that you can find the number of digits in a number through the formula $\lfloor \log_{10} n \rfloor +1$ What's the logic behind this rather what's the proof? What are badges? How do users get badges? How can users get tag badges? Can badges be lost/revoked/taken away after they are awarded? If so, how and when? How can I suggest a new badge?   For more information, see &quot;&quot; and the  in the . Add an application to the command search path in csh Recently, I have installed an application (gnuplot) under user directory (/home/usr/bin). I want to run the application whenever I type 'gnuplot' in any directory. What could I do?  I tried to set the path in ~/.cshrc by  setenv gnuplot /home/usr/bin/gnuplot   but it doesn't work. It reports "command not found" as I type gnuplot in the terminal. Can I get a rebate after using my HSA? I am looking for information on Heinrich Märte (my grandfather) and his family. He was born on July 1, 1912 in Sipplingen and died On April 19, 1944 when the military plane crashed in Geierswalde because its engine failed.  I am not sure if his family knows that he fathered my dad. I am hoping someone knows of him or his family. I would love to know how he met my grandmother or any further information on him.   We have always had two photo's of him, but never knew his name. We have only just found out about him and it has opened so many more questions.  How can I determine Heinrich's parents and siblings, and then locate any living family members? Look at this if block:  #!/bin/bash  str="m.m" if [[ "${str}" =~ "m\.m" ]]; then     echo "matched" else     echo "not matched"     exit 1 fi  exit 0   This should print "matched", but it doesn't. Where am I going wrong? To get the character sequences of a particular keyboard shortcut we use showkey -a or verbatim insert (Ctrl+V). What is the opposite of it? How can I get the keyboard shortcut in human readable format from character sequences? I used some keybindings for example ^[^? ^X^U ^[[3;5~ ^[[1;2D ^[[1;2C ^[[1;5C ^[[1;5D ^[[1;6C ^[[1;6D ....  Now I do not remember which key/key-combination they used to represent. How can I find that out? Update 1 I am looking for something which will output Ctrl+R or Ctrl+Delete etc, I mean in human readable format. Any reference to a table which has possible character sequences and their human readable formats will also do. Changing affiliation on publication I am moving from one job to another (postdoc to tenure track) this summer and I have papers in several stages of being written, these go from handwritten notes with all the necessary arguments to under revision at a journal. All the papers will have my new contact information put on them but where is the line for changing affiliation? It seems obvious to me that the one that is still in the handwritten notes stage will get the new affiliation and that the ones under revision won't. So somewhere in between is a line.   Where is it?  There are some similar questions so far (see  and  but they do not seem to be quite the same situation since I am not changing fields and the appointments are not concurrent. (Ubuntu/Linux)"find" command gives different results based on quotation marks I was using   find -iname *prib*   and getting only one result "./prib09jack.pdf" with   find -iname "*prib*"    I get many more results that I was looking for such as  ./Dir1/PRIB09/prib09jackTFF1.pdf   and many more, but why did it matter that the quotation marks were around "prib"?   Best. How can I copy one side of a rig to the other? How to get a dock on multiple monitors I have two monitors, but only one dock, which is somewhat annoying, so my question is, how do I get multiple docks? (One on each screen)