Forum: Photographic Technique
11-30-2017, 02:16 AM
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I'd add to Alex's routine, which I roughly follow: each time I remove and replace a rear cap, I use a blower to blow dust from lens cap and rear of lens. Not speedy, I admit, but I once noticed how much dust had built up inside the rear dust cap and I thought, where's that going to end up ?
Also, I've cut a small rectangle of old fish pond liner (rubberised - tough and cushioned), that I sometimes use as a 'changing mat' - slips nicely in a side pocket of bag. I tend to use this when I change lenses kneeling down, when hands are cold, weather's blowing, or I'm just feeling clumsy. I've marked the mat with a clean-side mark so I know what side faces the ground.
So with mat process:
1) Kneel and mat on floor. (If ground wet, I've also a second mat to kneel on if I must. Yup, takes a little more time to deal with)
2) Remove replacement lens from pocket/bag. Blow dust off rear of lens and inside cap, replace loosely. Place on mat.
3) Back to wind and camera pointing down, remove lens from camera, place onto mat, downwind.
4) Flick off replacement rear cap from replacement lens (as it's lose) onto mat and in one movement fix to camera.
5) Retrieve cap off mat. Blow cap and rear of replaced lens. Re-fix and back into bag/pocket.
6) Slowly stand ;-)
Takes, around 40-50 secs * ( a little over a minute to put mat(s) away). Not very speedy, but It's what I find an acceptable time, with a balance of protection from drops and limits dust ingress.
* For curiosity sake I've just timed it - inside, admittedly.
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Forum: Photographic Technique
11-30-2017, 12:27 AM
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Isn't this the proper answer for this situation ? Little doubt I my mind.
I might not bother with the front cap, as I use B+W protective clear filters anyway, but never the rear cap. If the rear lens is marked it will degrade the image much more than marks on the front. And swapping lens that have not been protected with a rear cap, accelerate the risk of dust migrating to the sensor. Why risk it ?
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