My policy has always been one lens one camera and having 6 Nikons makes this easy when on a commercial job. Now I am selling up and reducing to 2 bodies so lens changing will have to happen. I hate camera bags so that's not going to happen so how do you do it ...take lens off camera ..find lens cap in bag ..fit select new lens remove lens cap fit to camera .now some of this takes three hands etc …
So the solution is to mount two F mounts back to back and suspend them from your belt or whatever . I used two extension tubes and fitted the mounts back to back with a black plastic separator .
So now you have lens no2 hanging from your belt ..you take lens 1 off the camera and fit it into the empty F mount. Then remove lens 2 and fit it to the camera.
If you insist on a camera bag then glue two lens caps back to back and just swop the lenses end for end .
This means my body is open to crud for the minimum time.
I do agree a better system would be good. Yours screams for the temporary use of a body cap to me?
I also have small cheap Arca plates on all my stuff, bought a couple of Andoer CL-50LS Quick Release Clamps by Aliexpress for € 12.- each and have the easiest, very quick and stable setup for a small flash system and small camera's.
Great video here on how to do it
When you don't want to have your lenses in the open, Think Tank just released new lens pouches. Here you can get the lens out from the top.
I put the lens, with the lenscap off and the hood on, up site down ready to use in the pouch. Now I can make a quick switch and the lens is protected.
The actual steps are as follow: I start a lens change by first hanging the camera strap on my neck if it's not there already (I sometimes shoot with the strap wrapped around my wrist), I can then use both hands to take out the "in" lens from the bag, remove its rear cap and place it in the the bag's empty camera compartment. Then I grab the "in" lens with my left hand, unmount the "out" lens from the camera with my right hand and finally mount the "in" lens to the camera. Both hands are now available again to cap the rear of the "out" lens and pack it back into the bag.
It takes a bit of discipline to pull this off cleanly every time, which is harder than you think since you are mostly concentrated in the scene in front of you that is calling for the lens switch in the first place, but you need to be into it, otherwise something (a cap if you're lucky, a lens if you're not) will be dropped on the floor.
Lastly, I'm only using old, genuine, shiny, made in Japan Nikon rear caps. They are easier to grab and to put on/take off than the new, dull finished caps. Was using Sigma rear caps because they're bigger and even easier to put on/take off, but they do loosen out pretty easily.
The Peak designs unit ranges from £50-£100 on e bay but I found this supplier at £30 inc post
But, really, it's quite fast and accident proof if you have it well practiced, besides the unused lenses are always kept well protected: if you happen to sit down carelessly you might end up bumping the lens hung from your double changing belt contraption against whatever you happen to have decided to sit on.
What I have been doing presently when carrying one extra lens in a belt mounted drop-in case is:
That said, I'm not into lens changing, only if I really need to. My tune would change if I needed to start using primes, for light/resolution needs or such. The available zooms handle web-resolution quite well, IMHO.
****link to capture lens deleted as diverts to spam.****
That's 50% off MSRP, and still too expensive for me!