Best Tips for Swapping Lens over

  1. Turn the camera off.
  2. Get the replacement lens ready - unscrew the rear lens cap.
  3. Hold the camera down towards the ground and remove the current lens.
  4. Fit the new lens on the camera.
  5. Screw the rear lens cap onto the lens you just took off.

Don't worry about too much, dust will get into your camera regardless of how careful you are. Simply clean your sensor every 3 months or so :)
 
The sensor isn't exposed when you change the lens over, it's protected by the shutter so you won't get any dust directly onto the sensor at this point. What you do have to avoid though is introducing a lot of dust into the mirror chamber which can adhere to the sensor during subsequent shots.

The best advice is to be careful - keep the body pointing lens mount down while changing to prevent dust falling in and don't change the lens in an excessively dusty environment.

At the end of the day however all you can do is reduce the chance of dust entering the camera, it's not possible to prevent it.
 
i too am worried but i guess nothing stays new forever. i think the camera i am getting has some sort of cleaning function called the "super sonic wave filter" but tips are always usefull!
 
1) Clean your sensor at least once a week, every day if you are shooting a lot, or travling.

2) Change lenses when you need to, and don't worry about dust, as in Lightroom you can do dust removal on one image, and replicate it across all images in a shoot in about 5-10 seconds, and it is non-destructive.
 
Dust is a pain in the arse but there isnt really any fool proof method of avoiding it.

Where possible do it indoors, if you are outside try and get some cover or atleast turn away from the wind if there is any.

I always get the new lens ready, take the rear cap off, make the switch quickly and then get the old lens covered up and put away. Meaning the camera is exposed for a shortest amount of time possible, the lenses are easier to clean and if they do catch a bit of dust, atleast its only on one lens and not every shot you take.

Do whatever you think is reasonable, but accept that there is no real way of keeping dust out, just got to clean it regularly.
 
The way I do it is...

1. Get the new lens ready by unscrewing the lens cap but NOT removing it yet, but so when I lift the lens the cap will stay on the floor.

2. Unlock the lens on the camera, to the same state as the new lens.

3. Simultainiously lift both up and swap the positions of them. (Overall exposure of about 2 seconds)

4. Lock them both in place, job done.

I always have it so the end which goes in the camera is pointing down, to try and avoid dust/dirt getting on it, because as said before, the sensor is protected by the shutter. :)
 
What is the best way to clean the sensor? (Bit of a thread hijack... but its been mentioned a couple of times in this thread about cleaning the sensor every x months/etc)
 
Personally if i have the time, i just use my air blower thingy when i change a lens. Haven't had any dust spots since.
 
Chronicle said:
What is the best way to clean the sensor? (Bit of a thread hijack... but its been mentioned a couple of times in this thread about cleaning the sensor every x months/etc)

Your first port of call should be to invest in a rocket blower if you've not already got one.

Failing that there are quite a few products which you can use e.g. sensor swabs & eclipse fluid but generally it's best to use this if you've got a lot of crud stuck on your sensor
 
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I have a spec on dirt on my mirror - it shows through the viewfinder on my 350D (irrespective of which lens I have fitted) and doesn't show on any images.

What is the best way to remove this spec from the mirror?
 
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