EEEK! - Earwig on sensor

[dcw@pr]

I've never seen a *thing* this big on a sensor before, where is the best place to buy the propellant-less compressed air?

[pic]http://www.pr-photography.org/pistonheads/theme/earwig.jpg[/pic]

[simpo two]

Too much DOF

[dcw@pr]

simpo two said:

Too much DOF

LOL you know what - I thought of you when i took that photo.

I set it to f/22 specifically to see what the dirt looked like, and it was the first time I could remember doing so...

[V6GTO]

dcw@pr said:

where is the best place to buy the propellant-less compressed air?

DO NOT USE COMPRESSED AIR ON YOUR SENSOR!!!

You'll very likely cause damage. Try a puffer brush without the brush first, and if that isn't strong enough use the brush very gently, and then only if it is a very good quality one, with very soft bristles.

Martin.

[dcw@pr]

V6GTO said:

DO NOT USE COMPRESSED AIR ON YOUR SENSOR!!!

I've had my fair share of scares with compressed air (the best was when I got a spray of propellant on the low pass filter )

but there is stuff made specifically for cameras now that doesnt have a propellant in it, I think it is plain compressed CO2. I wouldn't have many objections to doing that occasioanlly.

I've used a normal puffer brush before, and it made the problem worse. I found it gets rid of the big bits but you get millions of tiny things everywhere

[LongQ]

dcw@pr said:

but there is stuff made specifically for cameras now that doesnt have a propellant in it, I think it is plain compressed CO2. I wouldn't have many objections to doing that occasioanlly.

- Think of the planet ....






>> Edited by LongQ on Sunday 22 May 17:05

[anonymous-user]

dcw@pr said:

but there is stuff made specifically for cameras now that doesnt have a propellant in it, I think it is plain compressed CO2. I wouldn't have many objections to doing that occasioanlly.

IIRC it's not so much the propellant that's the problem, but actually forcing dust or whatever between the anti-aliasing filter and the actual sensor itself where no amount of cleaning is ever going to get it out.

[dcw@pr]

LexSport said:

IIRC it's not so much the propellant that's the problem, but actually forcing dust or whatever between the anti-aliasing filter and the actual sensor itself where no amount of cleaning is ever going to get it out.

never heard that before. As far as I was aware there is a clear glass low-pass filter on top of the sensor (and anti aliasing filter) which is where the dust stis. I don't see how it would be possible to get dust under here. Perhaps someone can tell me otherwise...

[V6GTO]

You could force a grain of cr4p across the sensor with sufficient force to scrath it, and even worse, snap the sensor clean in half!

Martin.

[joust]

Check this thread
www.pistonheads.com/gassing/topic.asp?t=175555&f=109&h=0

and this one
www.pistonheads.com/gassing/topic.asp?t=178956&f=109&h=0

For sensible ways to clean the sensor.

For those thinking of using compressed air, please check out this poor chaps story...
www.robgalbraith.com/ubbthreads/showflat.php?Cat=&Board=UBB1&Number=320672&Searchpage=1&Main=320672&Words=cracked&topic=&Search=true#Post320672
$650 mistake cleaning the CCD with warm compressed air.....

J

[srider]

V6GTO said:

You could force a grain of cr4p across the sensor with sufficient force to scrath it, and even worse, snap the sensor clean in half! Martin.

Martin, you been on the San Miguels?

I use compressed air carefully on my sensors, from 4-6in away, mostly to blow out the mirror chamber before swabbing. The potential problems are propellant coming out, and the gas freezing the glass. By keeping the can upright and just using occasional short puffs I've never had a problem.

Sensor cleaning isn't the dangerous procedure repair shops or manufacturers would have you believe.