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No. I'd rather have the camera body and the back of the lens stay "sealed." That used to be a real issue with dust on the sensor and in the mirror box. Not as much any more.
But I have never taken the lens off to store short term in 20+ years.
I always use a UV protective filter on the front of the lens too, but that is a different discussion.
Does everyone else think that's true? Does an ND filter degrade the optics?
Of course it does. How much depends on the filter.
I never use UV filters anymore either. You use an ND when you need it and no other time, when the trade off for a little diminishing of the image is paid for with not having the shot blown out.
I never store more than maybe a day with the lens on. I put on the the body cap.
The process of making a lens accurate and distortion free is complex and time-consuming - and therefore expensive. Optically accurate flat glass, however, is nowhere near so complex a process, so although an extra layer of material will distort the image to a degree, the degree is very small on typical lens sizes. Having scratched the front coated lens of my nice Canon B4 lens, I'm firmly in favour of adding protection and leaving it there, because I can't detect any difference. I'm happy there is some, of course - my point being that I just can't see it!
Well then how does everyone shoot outside with a large aperture?
You use an ND filter. Not saying it trashes the image. It degrades it, probably not noticeable, maybe so, depending on the filter and it's condition. Just like sometimes you have to shoot a little higher ISO than than you prefer. It is what it is. Stay away from cheap plastic crap and use a decent one and it's fine.
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