Edwin Francis said:There is no defined SHUTTER LIMIT. Manufacturers can test their shutter mechanisms to certain numbers -- these are often mentioned in specs like MTBF (Mean Time Between Failure) -- look it up if you want. That doesn't mean your camera will stop at or near that number. Some go on 2-3 times (or more!) the MTBF, a few die in the first few exposures (lookup Bathtub Curve too, if you can be bothered), most last somewhere in between.
When your shutter fails, have it replaced. If you have to replace it after 50,000 exposures (a reasonable MTBF for modern DSLRs), you will hopefully have gained so much experience and skill that you will consider the cost well worth spending. Or just buy a new body.
And in 20 years you'll probably have moved on to new, better, faster etc cameras many times over. The ports, batteries and even memory cards we're using now may no longer be supported! The first digital camera I used (a 1996 Sony) used 3.5" floppy disks -- I don't even have a drive for those anymore.
Stop worrying about minor inconsequential things. Go out and shoot!
Thanks! My camera specs said tested to 100,000 shutter count. So I guess I can expect to use it for about 5 years if average 500 exposures per week. Probably more in future. I guess in 3-4 years time I'd have moved on to a new body. Luckily lens does not have aperture leaf exposure life as well. Otherwise have to replace lens. Haha !