| Author | Message | ||
     Winfried Rating: N/A |
I know, on college I had classes in mechanical engineering and learnt that due to heat expansion ALL dimensions of an object will get bigger, which means that ALL dimensions including hole diameters will get smaller during contraction. That's why I am a bit puzzled by my observations on this shutter, it seems as if the material has expanded which is contrary to the rumours I have heard about die cast materials. As mentioned, there are no or only little traces of corrosion inside the shutter (minor traces of rust on some steel bolts and parts). In most cases the corrosion products have a lower specific weight, or, in other words, a bigger volume than the original material which causes rusty screws to stick. But the die-cast parts seem to be clean and there are no whitish traces on it as you sometimes seem on die-cast non-plated aluminium parts of cameras. |