Disclaimer- Cleaning your sensor isn't risky but does carry risks. If you damage your sensor while cleaning it is not going to be covered by your camera manufacturer's warranty and the only official cleaning method recommended by the camera manufacturers is to send in the camera for cleaning. The information I present in this post and video is based on my own experience, by following, you accept complete liability for any damages that may result.Let’s talk about dirty sensors. It happens, it’s not a big deal.Dust on the sensor typically doesn’t show up unless you are shooting at smaller apertures. Bigger bits might show up starting around f/8, but it is really above f/14 and up to f/22 where you see the dust. If you are shooting lots of landscapes, this can be an issue. If you are shooting lots of portraits, with apertures below f/5.6 you can stop reading and go back to enjoying life. It is unlikely you will see any dust impact your image.The first step in cleaning is to determine how dirty your sensor is. A quick way to test is to take a picture of a clean white piece of paper at f/8, f/14 and f/22 - don’t worry about your shutter speed - the dust spots will be sharp even if you shoot at slow shutter speeds, but you do want to keep your ISO fairly low to avoid noise confusing the issue. You could also photograph the sky on a clear day.Now pop that image in Lightroom and in the develop module there is a nifty option to Visual Spots located under the Spot removal tool. Need Lightroom?Rollover the image below to see the before and after Visual Spots with my Sony a7RII sensor at f/22[himage][/himage]If your sensor looks like Sony a7RII sensor does after just a few weeks of use - you probably want to clean it.Many DSLRS and Mirrorless cameras have a sensor cleaning mode - some run every time you turn the camera on or off and some run when selected. This is the first option you should try. With many of the systems, it is recommended to either hold the camera normally or facedown with the lens off so that the dust falls out. The Sony A7RII I have violently vibrates the sensor for a second or two and did absolutely nothing to reduce the amount of dust on the sensor. Hopefully you will have better results. Test again after using the in camera method.The next step is to use a rocket blower - NEVER use compressed air or air in a can dust off products. Again hold the camera in such a way that the dust will fall out and give a few puffs directed at different areas of the sensor. They do sell sensor loupes - little magnifiers with led lights that make it easier to judge your progress. I used a tiny LED bike light to help see the sensor but it is clear that a bit of magnification will help too as some of these dust specks are invisible to the naked eye.$17 Sensor Magnification and LED light $9.95 Rocket BlowerBuy Rocket Blower from Amazon | B&H Photo VideoI was impressed with the results of the rocket blower- it did a good enough job that I would be happy stopping there - but if you want to get your sensor even cleaner you are going to need to touch it with something.Please read and follow all directions carefully for the kit you purchase and consult your camera manual for additional information.You have options - there are the expensive static charged brushes like the Arctic butterfly (see it at B&H) for $130 - you drag a statically charged brush across the sensor and it picks up the dust. In theory this should work fairly well with all but the stickiest particles and you never need to replace any pads etc but your up front cost are quite high. It does have two nice, bright LEDs to see what you are doing.Or you can go with something like the DustAid Platinum DSLR Sensor Cleaner for $26 that provides 6 cleanings - you get these little sticky pads that you gently press on the sensor, the dust sticks to the pad and then you use included “tape” to clean the pad.Or a more traditional kit like this DustAid Dust Wand Kit for $30 - Should provide about 20-40 cleanings depending on your sensor which is what I used in the video. You simply take one of the dust cloths out, wrap it carefully around the wand and apply a few drops of their cleaning solution- The larger your sensor the more drops you apply.If you are working with a DSLR you do need to put it into manual cleaning mode which pops the mirror out of the way. The dust aid directions suggest starting in the lower left corner and moving across the sensor. Put a new cloth on and repeat the process from the top left to the right again. Use your light and or loupe to inspect and if necessary wipe again with a clean cloth. Note that the special liquid evaporates fast so you should wipe immediately after applying.I hope this video was helpful. Do you have a favorite sensor cleaning method? leave your suggestions below and if you have any questions - you can leave those too. I’d love it if you hit that subscribe button - that way you can be notified of future videos, tips, tricks and reviews.Follow me on Instagram to see more of what I am up to day to day and all my dirty sensor photos.Make sure you don't miss a future video, subscribe to my Youtube ChannelLearn Lightroom
Roger Clark at ClarkVision (http://www.clarkvision.com/) has completed his review of the 7D Mark II and found the sensor to be the BEST low light Canon sensor on the market.A few lines from his conclusion-
The data shown here for the Canon 7D Mark II indicate that the camera is operating at near perfect levels for the sensor with lower apparent read noise and impressively low pattern noise compared to all other current Canon cameras tested and better than that in the 7D Mark I. This means that for high signals, noise is dominated by photon statistics. Sensitivity is improved 14% over the 7D Mark 1, and the sensitivity per square micron is the highest that I have measured for any Canon camera to date.The approximately 10x lower thermal dark current is a game changing factor, making this camera the top Canon camera for long exposure low light photography that I have tested. The superb autofocus system, comparable to Canon 1D series pro cameras with 65 autofocus points is another game changing innovation, as the camera is at a price point that is affordable to more people.
Read his full and extremely detailed review at http://www.clarkvision.com/reviews/evaluation-canon-7dii/ This certainly inspires me to head out and take some long exposure shots - something I have not done with the 7D Mark II at this time. I can say the 7D Mark II is one of the nicest cameras I have held in hand - feels perfect and button layout and customization are wonderful.Buy your 7D Mark II from Amazon or B&H Photo Video (body only $1799)