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Photo Forum / Digital Photography / DSLR Cameras / July 2005Mirror cleaning??
It's dusty, EOS 350D? Any advices to clean ? I always try an air bulb first. If that doesn't work I use the sensor brush. However, be aware that some manufacturers will void the camera warranty if you do anything to the sensor during cleaning. Ron Bigelow http://ronbigelow.com/ >I always try an air bulb first. If that doesn't work I use the sensor >brush. However, be aware that some manufacturers will void the camera >warranty if you do anything to the sensor during cleaning. Ron, when cleaning the mirror, how exactly do you envisage the user being able to damage the sensor which is hidden behind the mirror and a closed shutter? ..just curious..  SignatureOwamanga! http://www.pbase.com/owamanga > >I always try an air bulb first. If that doesn't work I use the sensor > >brush. However, be aware that some manufacturers will void the camera [quoted text clipped - 5 lines] > > ..just curious.. OK. I've been wrong once today--I have never heard of a front silvered mirror surface before--but when I took the lens off my Pentax, the mirror is staring right at me, sort of from the bottom of the well. Cleaning it doesn't seem to be a high priority need, anyway, unless the goop gets so bad that it affects vision through the viewfinder. The sensor, as you note, is a different matter. It's about 1/50th as fragile as many of us originally believed, at least when it's in position and under the glass filter that covers it. Dino napisał(a): > It's dusty, EOS 350D? Any advices to clean ? little breeze of air would do fine... if not pls ignore it.. i know it's hard but when if you scratch the silvered(very delicate) mirror you would go crazy and check alll the time wheather the af accuracy is allright and so on... i did so... well i didn't scratch it... but it's tiny smeared... just tiny and i keep blaming myself ;))) just air if it don't helps ignore it... if you can't visit service... Signature.........Marek Mollin "rogus"......... ..http://rogus.atspace.com/da/ad.jpg.. ............coming soon............... ..............Pozdrawiam.............. > Dino napisa³(a): > > It's dusty, EOS 350D? Any advices to clean ? [quoted text clipped - 5 lines] > tiny smeared... just tiny and i keep blaming myself ;))) just air if it > don't helps ignore it... if you can't visit service... So wipe the smear off. The silvering is on the BACK of the mirror. > So wipe the smear off. The silvering is on the BACK of the mirror. I doubt it. I've never seen an SLR that doesn't use a front-surface mirror. >> So wipe the smear off. The silvering is on the BACK of the mirror. > >I doubt it. I've never seen an SLR that doesn't use a front-surface mirror. Exactly. A rear-surface mirror gets extra reflections from the front surface for bright objects, so you will wind up with two copies of each highlight in the viewfinder, and one will be out of focus a bit, thanks to the different path for the light. If you focus on the wrong one (or if your autofocus does), you are out of luck for that image. And yes, the front-surface mirrors are delicate. Enjoy, DoN. SignatureEmail: <dnichols@d-and-d.com> | Voice (all times): (703) 938-4564 (too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html --- Black Holes are where God is dividing by zero --- Yep, I would rather have a need to clean the sensor than the mirror. It is extremely soft and once marred it it marred for life. ken >>> So wipe the smear off. The silvering is on the BACK of the mirror. >> [quoted text clipped - 11 lines] > Enjoy, > DoN. >Yep, I would rather have a need to clean the sensor than the mirror. It is >extremely soft and once marred it it marred for life. The mirror is a lot easier and cheaper to replace. Tony Polson napisał(a): > The mirror is a lot easier and cheaper to replace. do you know some prices of mirros of.... for example 350d? Signature.........Marek Mollin "rogus"......... ..http://rogus.atspace.com/da/ad.jpg.. ............coming soon............... ..............Pozdrawiam.............. [..] >The mirror is a lot easier and cheaper to replace. That may be, but it is also very unlikely that you will need to replace a mirror during the lifetime of a camera. Small spots and scratches on the mirror are invisible in the viewfinder and do not affect pictures in any way. The only problem would be if they are so large that they interfere with spot metering or autofocus, but this is not likely (unless some users are into the habit of cleaning the mirror by spitting on it and wiping it with their elbow, or subject their cameras to heavy environmental hazards while changing lenses) >> So wipe the smear off. The silvering is on the BACK of the mirror. > >I doubt it. I've never seen an SLR that doesn't use a front-surface mirror. ISTR that my 1971 Zenit E (Russian SLR, built like a tank, low-spec) had a rear-surfaced mirror. Yes - just got it out (kept it for sentimental reasons - it no longer works); it appears to have a very thin rear-silvered mirror, I can see a clear secondary image on waving a small torch near it, and it doesn't scratch with a fingernail. It's the only one I have come across, though, so you are substantially right. David SignatureDavid Littlewood |
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