Not that I am doing any imaging right now but I have found to my horror that I have two big(!!) dark stains on all images with the Canon..this has happened recently don't know when...any suggestions on what do ?
TIA
Hi Narayn, run through the sensor clean process. It'll lock the mirror up so you can see if there is anything on the IR filter covering the chip. If there is you might have to clean it If there is nothing obvious then maybe as Wayne says there could be condenstion between the CMOS and the filter.
Might just be dust as well, do a google on cleaning techniques; apparently the filter in front of the sensor is very easily scratched and make sure you have a fully charged battery before doing the clean..... Then again it might be a better idea to sell it to Striker and then I could buy it from him for $300 two weeks later and convert it for dedicated astro use...
Howdy
Could you open the shutter using the sensor clean thing and use a bright torch to look closely at the sensor and see if theres a visible mark on the sensor. Could you also post up an affected image.
It seems that if it is a stain rather then a single line its not a scratch or dust, perhaps some oil or somthing somehow got on the sensor window. You cant remember exactly when it happened, or what you were using the camera with when the first affected images started happening?
Scott
Howdy
Could you open the shutter using the sensor clean thing and use a bright torch to look closely at the sensor and see if theres a visible mark on the sensor. Could you also post up an affected image.
It seems that if it is a stain rather then a single line its not a scratch or dust, perhaps some oil or somthing somehow got on the sensor window. You cant remember exactly when it happened, or what you were using the camera with when the first affected images started happening?
Scott
I'll post an affected image later tonight when I get home
It is definitely a stain not a line or a scratch..just dont know when it happened..could be condensation as suggested by Wayne and Paul but whatever it is, its been there for a while.
No Striker, I am not tempted by your generous offer
I had a similar marking as well a while back , followed the directions in my manual with locking the mirror and gave the IR filter a burst with a lens blower , it did the trick . If the blower doesnt remove the particle it may be best to get it serviced then risk physically touching the filter .
I'm with Beren, and had mine properly serviced recently (it is a Nikon D100 though, not Canon). While cleaner, and my wallet lighter, it still has the odd blotch. If you want to be rid of them get it done properly. Then if (like me) there is still the odd bit, do the Ponders thing, and flat it.
Gary
Forgot
Striker was a bit high. There was a used 300D on Astromart yesterdya, for US$350 I think. Even that was too high for a Nikon owner to consider jumping ship.
Forgot
Striker was a bit high. There was a used 300D on Astromart yesterdya, for US$350 I think. Even that was too high for a Nikon owner to consider jumping ship.
for that money why not buy it and get rid of the IR filter..sounds suss though
They look like large dust particles, I too, recommend using a blower brush without the brush on. If that doesnt work you could risk using one of the new CMOS cleaning kits around now in photographic shops but if u do follow the instructions exactly. Ive seen kits that consit of disposable sterile swabs (dust free) that you wipe once across the sensor then dispose of,single use so that dust collected doesnt cause scratching.
Here is some info on sensor cleaning http://www.luminous-landscape.com/es...cleaning.shtml
some more at http://www.bythom.com/cleaning.htm
When I change lenses I always point the camera down and do it as quickly as I can and preferably indoors or at least out of the wind to try and reduce chance of dust getting in.
I hope u get a speedy return to dust free imaging
Scott
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If there is nothing obvious then maybe as Wayne says there could be condenstion between the CMOS and the filter.
