Canon EOS 5D Mark III Service Advisory - Light Leak Phenomenon

[Abu Dhabi]

This is the link for examination


http://www.youtube.com/watch?v=25Dgb...e_gdata_player

[Abu Dhabi]

You must cover the viewfinder when you do the examination ,,, if you don't cover it the light sensor will effected by lights normally

[aestiva]

I tried it, but I don't see a light leak at my 5D MKIII. Maybe because I have an Eurpean version?

Kr,
Ashvin
www.totaalfotografie.nl

[MikeMSD]

Has this problem been fixed on new cameras or do all have it?

[sandpiper]

Originally Posted by MikeMSD

Has this problem been fixed on new cameras or do all have it?

It's been "fixed", but it was never a problem anyway unless you like taking pics with the lens cap on.

[ageha]

Originally Posted by sandpiper

It's been "fixed", but it was never a problem anyway unless you like taking pics with the lens cap on.

So how did they fix it? Are the bodies where the serial number's 6th digit is greater than 2 all fixed with tape too or did Canon redesign the camera internally a bit?

[Dj R]

tape I believe.

[ageha]

Originally Posted by Dj R

tape I believe.

Wow, still just tape? Amazing they didn't even bother doing it properly.

[Andrew_WOT]

Originally Posted by ageha

Wow, still just tape? Amazing they didn't even bother doing it properly.

What's wrong with the tape, it's all over the place inside any camera, computer, phone, tablet, you name it? It wasn't issue to begin with anyway.

[ageha]

Originally Posted by Andrew_WOT

What's wrong with the tape, it's all over the place inside any camera, computer, phone, tablet, you name it? It wasn't issue to begin with anyway.

No, it isn't.

[DavidWatts]

Originally Posted by ageha

No, it isn't.

Yes, it is. And read the entire thing. Tape is also how Apollo 13 made it back safely.

[ageha]

Originally Posted by DavidWatts

Yes, it is. And read the entire thing. Tape is also how Apollo 13 made it back safely.

lol, you're funny.

[sandpiper]

Originally Posted by ageha

Wow, still just tape? Amazing they didn't even bother doing it properly.

There wasn't a problem. It didn't need doing at all, never mind "properly".

Several other models of cameras exhibit exactly the same sort of light leak (including the 5d mkII), nobody ever complained about them, because nobody ever tried to see how they performed with the lens cap on.

This "issue" arose because somebody figured out that if you shine a light on the LCD panel it can be just enough to make a slight adjustment to the meter, assuming that there isn't light coming in through the lens (i.e the lens cap is on or you are shooting in extremely dark conditions).

Now, how many people take photos with the lens cap still on? Do you leave it on? If in the sort of extremely dark conditions where this may have a slight (fraction of a stop) effect, the meter is outside it's effective operating range and will not be accurate anyway. Therefore, no fix is actually required to make the camera perform it's normal task.

The only reason Canon came up with a "fix" is to shut up the people who were making a big fuss, about this totally irrelevant phenomena. Tape has been used to make things light tight for many years, it is the best thing to use to block a few stray photons in this instance. What would you consider "doing it properly"?

[ageha]

Originally Posted by sandpiper

There wasn't a problem. It didn't need doing at all, never mind "properly".

Several other models of cameras exhibit exactly the same sort of light leak (including the 5d mkII), nobody ever complained about them, because nobody ever tried to see how they performed with the lens cap on.

This "issue" arose because somebody figured out that if you shine a light on the LCD panel it can be just enough to make a slight adjustment to the meter, assuming that there isn't light coming in through the lens (i.e the lens cap is on or you are shooting in extremely dark conditions).

Now, how many people take photos with the lens cap still on? Do you leave it on? If in the sort of extremely dark conditions where this may have a slight (fraction of a stop) effect, the meter is outside it's effective operating range and will not be accurate anyway. Therefore, no fix is actually required to make the camera perform it's normal task.

The only reason Canon came up with a "fix" is to shut up the people who were making a big fuss, about this totally irrelevant phenomena. Tape has been used to make things light tight for many years, it is the best thing to use to block a few stray photons in this instance. What would you consider "doing it properly"?

Having no light coming into the body.

[sandpiper]

Originally Posted by ageha

Having no light coming into the body.

Then how would you see what you are shooting?

There is many hundreds of times more light "leaking" into that same area of the body, through that damn great window in the back we call a viewfinder. To have no light entering the body would mean covering up the viewfinder as well.

The tape DOES stop the odd few photons that used to get past the LCD, which is what people moaned about, but that tiny amount of light is completely overpowered by the flood of light getting in through the viewfinder, which in turn is overpowered by the light coming in through the lens.

Seriously, what is your concern, the tiny amount of light getting past the LCD has as much affect (in normal photography) as trying to use the display on your cellphone, to make a difference lighting up an object in direct sunlight. In a pitch dark room, turning your phone on will light the room up enough for you to see by quite well, in daylight you will never see a difference. The same goes for the LCD "light leak", it makes a slight difference when the camera is pitch dark (i.e. if you have the lens cap on) but let light in through the lens and it just isn't powerful enough to make a difference.