Apart from the dust issue, are you asking for more lens modules ... or?
I've noticed nobody posting about any dust issues with their M-mount modules, despite changing lenses (evidently quite a bit). Interesting.
You need to know "the history" MW.
This is an "old saw" that goes back to the days of the first GRD and the GX. Some people get it and others don't. Hasn't been discussed on this forum for a while now - every forum seems to have a variation of the dust in the camera tale.
All sorts of slaps and carry-on about it. People in hot lands don't seem to get it despite dusty conditions, yet people in cold, damp, "dust free", artificially heated lands do.
We have analysed lens seals, opening doors in dusty conditions, pocket lint from pocketing the lens, cigarette smoke, etc, etc.
If you try and tell someone that it is partly their fault then there is some rightful indignation about the implication that they have somehow been careless with their gear. It is always the manufacturer's fault.
I posited quite a while ago that wet weather, wet weather clothing, and changes in temperature are ideal for static electricity and static electricity attracts dust like a magnet. Not saying anything more - it invariably goes down like a lead balloon.
I buy a few old lenses, as if nobody has noticed, but everyone that sells them protects themself by saying "it has a bit of dust inside, as it is an old lens, but it will not affect photographs' (even when there is no obvious dust inside).
Dust is inevitable to a greater or lesser extent. The worst camera type I have ever had for dust is (all) my Canon dslr bodies. When at a wedding shoot I unfortunately left my camera bag open under an innocent dead bush while I changed lenses. Must have been raining invisible micro-fibres as it took me months to get that sensor clean again.
And of course the Canon 100-400mm f4.5-5.6 "trombone" is regarded as a "dust pump" but I would not part with mine for quids - it is a great lens, no way any lens seal would keep a great volume of air from being forced through that lens.
I have had 0 (zero) dust problems in my R4, GX100, GRD, R8, R10, CX1, GRDIII and GXR mount modules. I am surely blessed or I simply do not look hard enough. I do reserve the right to find some at a later date as surely I cannot continue to be that lucky.
On the other hand I have has some specks on the sensor of my A12 mount module where the lens can be removed. The neat "trick" of the default closed shutter prevents dust directly falling on the sensor when the lens is removed. An occasional low puff of air in the cavity can remove any lurking dust. Anything that might stick is easier to get off the shutter blades than off a sensor (been lucky thus far). Therefore any dust that gets into the sensor cavity is probably not the sticky-stuff. Default open the shutter, turn the camera upside down and some rapid air circulation and gravity does the rest. Done. What is the problem?
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Tom Caldwell
