I was taught that any zoom was a compromise vs.number of primes
now today's zooms are a much better compromise than many that were made in the past
I have purchased a PLM for one purpose, to have a light weight lens that is good for its purpose - a very capable zoom easy to use and carry
if there is no issue carrying a number of primes to cover the focal length of the zoom, the changing of the lenses and the weight of the primes, I prefer the primes
and if you get lucky you can get good quality " experienced " lenses to help with the cost of lenses
you must determine what you need and can obtain.
simple as that.
a number of prime lenses vs.55 - 300 zoom
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as BigMackCam notes, all lenses can get dust, even primes, the question is how, if any, does that affect your photography. Can you see to use the lens. Is the dust affecting your photos ?
perhaps these articles might help the OP and others
https://photographylife.com/what-to-do-with-dust-inside-lens
" . . . 4) What to do with lens dust
Once you spot lens dust, what should you do with it? The answer is – nothing. Don’t worry about it and just keep on shooting, concentrating on creating great images. As I have explained above, lens dust is a normal fact of life, just like dust on your camera sensor. Even if you take a good care of your gear on a daily basis, you will eventually end up with dust in your lenses and cameras, guaranteed. You can certainly minimize the amount of dust getting into your gear by storing it properly and performing regular cleaning and maintenance (which I will cover in an upcoming video tutorial), but you cannot fully prevent it from happening. Dust is inevitable and it does get into camera gear one way or another, so you should not be sweating over it if you have it. Try an experiment – come close to a dirty window in your house and look outside. When your eyes focus on the outside, can you see the dust or dirt on your window with your eyes? No, unless the dirt particles are huge. The same thing happens inside the lens, if there are small dust particles, it is not a big deal. So take a deep breath, chillax and stop worrying about dust.
The only case where you might need to call your lens manufacturer, is if you spot an abnormally large spec of dust more than several millimeters in size that moves when you rotate the lens. There are cases, when particles break off inside lenses, typically after lenses are dropped/damaged. . . . "
another source:
https://www.lensrentals.com/blog/2011/08/the-apocalypse-of-lens-dust/
" . . . Does any of this have any real world implications? Nah. Unless you get a bug inside your lens there’s not much need to worry about dust. Until there’s so much dust that it interferes with contrast or light transmission. When is that? Well sounds like another article coming up, doesn’t it? But it would be a lot of dust. "