Archived posting to the Leica Users Group, 2001/09/18
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]It seems to me that the sensor might be covered with a shield of some sort- I refer to the old EPROMs I used to use, that were erasble with UV light- they had a small quarts window over the eletronics. I would have assumed that the CCD or optical sensors in cameras were in some way protected in a simaler fashion. Most chips seem to be a die mounted into a ceramic case, and I would like to think that a similar case would be used with the camera chip. Perhaps Jim might shed some light on the way these are made, since he is familiar with the 'bidness'! Dan - ----- Original Message ----- From: <leica@davidmorton.org> To: <leica-users@mejac.palo-alto.ca.us> Sent: Tuesday, September 18, 2001 4:01 AM Subject: RE: [Leica] Digital/ x ray > Dennis Painter wrote: > > "Magnetic fields cannott affect digital storage unless it is magnetic i.e. > floppy disks or tape or hard disks. Most digital cameras use semiconductor > storage, not affected by magnetic fields." > > The Microdrives that most folk use in pro digicams (such as the Nikon D1) > are tiny hard disks. > > "If dirt is a problem then don't change lenses ;-) Likely this is a problem > for > just about any camera, the internals are going to be sensitive to dirt and > dust." > > The pro digital SLRs I've used are *very* sensitive to dust. You change the > lens (not something that's easily avoided), dust gets into the body, finds > its way onto the sensor surface and hence onto your images. > > The sensor is *very* difficult to clean in the field, you can try putting > the shutter on B and spraying the sensor with air, but IME it doesn't work > very well. Usually it's a tech job. > > At the same levels of dust and dirt a conventional camera just keeps going. > > In practical use, dust on the sensor is a *serious* problem. > > -- > David Morton > dmorton@journalist.co.uk > > "The more opinions you have, the less you see." -- Wim Wenders. > -- > To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html