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+====== Equipment Handling and Maintain Guide ======
+Note: DSLR camera is not compact camera, as when you interchange lens, dust can come in, so
+  * keep you DSLR equipment in a safe, dry, good air flow environment, as in wet environment, Fungus can grow into the equipment, (which is bad)
+  * when interchange lens, make sure camera open mount is facing down, so no dust drop in,
+    * blow away dust when lens is mount up while mount part face up.
+    * then mount it.
+  * camera bag should be clean and soft and safe.
+  * get a dry box if possible, but as long as you use it every day, shine them under the sun, they will be healthy and fresh
+====== Dry Cabinet ======
+  * for the digital dry cabinet, for manual humidity level setting,
+    * Green Zone = 55-60% setting
+    * Blue Zone = 40-55% setting
+    * Red Zone = 35-45% setting
+====== My Fighting of the Lens Maintaining ======
+  * I have met Fungus with my first lens, it is in the corner, but as I use this lens most time, it didn't grow, and my APS-C doesn't not see this full frame lens corner;
+    * the technical term for lens opener is: "Spanner Wrench" ([[http://item.taobao.com/item.htm?id=10279615055&ad_id=&am_id=&cm_id=&pm_id=|双头工（井）字扳手]])
+  * Home lens clean solution:
+    * https://www.diyphotography.net/remove-fungus-lenses-using-soap-water-vinegar/
+    * https://www.dpreview.com/forums/thread/3221691
+    * https://petapixel.com/how-to-remove-fungus-lens/
+    *
+  * I have met Dust in Camera Sensor, I blow it away almost completely with Giottos Rocket Blower in Clean Toilet, only one tiny dot showing up with small aperture below f8;
+    * Then, I bought sensor clean wipe, now everything is cleaned
+      * http://www.ebay.com.sg/itm/8pcs-Dry-Wet-Swab-CCD-CMOS-Sensor-Cleaner-Cleaning-Kit-/170756301846?pt=UK_Camera_Cleaning_Equipment_Kits&hash=item27c1de6416
+Reference:
+  * **Note: disassembling the lens is worst solution ever**, keep it as last solution for the camera service center.
+  * remove moisture from inside camera lenses
+    * http://ask.metafilter.com/15968/How-do-I-remove-moisture-from-inside-camera-lenses
+    * http://www.pentaxforums.com/forums/pentax-slr-lens-discussion/39648-moisture-inside-lens.html
+  * Fungus cleaning for manual lens: http://www.youtube.com/watch?v=-rlDO5Qj6cU&feature=related
+    * http://www.paintedstork.com/digiblog/2006/08/dealing-with-fungus-in-lens.html
+    *
+Fungus (left)
+{{photowiki:lens_fungus.jpg?500|Lens Fungus}}
+** Cheapest Maintain Solution - Silica Gel **
+{{photowiki:camera_silica_gel.jpg?500|Silica Gel}}
+====== Lens Fix Guide ======
+  * 巨眼之门: http://www.bigeye.url.tw/big5/index.html
+  * Cleaning FUNGUS from vintage lenses!! Tools and method.: https://www.youtube.com/watch?v=czoisKjBCXY
+====== Sensor Cleaning ======
+  * here is the video guide: http://www.youtube.com/watch?v=qi6S3jHA21w&NR=1&feature=endscreen
+  * http://www.youtube.com/watch?v=ChWoZViP0-A&feature=plcp
+  * http://www.ebay.com.sg/itm/8pcs-Dry-Wet-Swab-CCD-CMOS-Sensor-Cleaner-Cleaning-Kit-/180765844378?pt=Digital_Camera_Accessories&hash=item2a167be39a
+====== Digital Camera Problem and Fix ======
+  * Problem: Camera reset time every time when changing battery
+    * Fix 1: try using a different brand memory card (example, a kingston, sandisk, transcend, etc) or try checking if reset problem still existing when there is no card while changing battery
+    * Fix 2: if fix 1 failed, try using another battery
+    * Fix 3: if fix 2 failed, try re-install firmware
+    * Fix 4: leaving a charged battery in camera for a few days to recharge internal clock battery
+    * Fix 5: clean the battery's contact area (with alcohol)
+    * conclucion if all failed: those capacitors in internal cameras have a limited cycle life, leaving camera without battery for too many times, like those people prefer to keep battery out of camera when not using, may have got this issue.
+    * last solution, send to service center to fix it.