topic Re: Canon 6D ViewFinder Spot in EOS DSLR & Mirrorless Cameras

Canon 6D ViewFinder Spot

sakibnaz — Tue, 26 Jul 2016 19:58:37 GMT

Hi All.

I suddenly observed a cracked type spot while I am watching through ViewFinder on my 6D. I have attached a picture from my iPhone and the spot is red marked. The spot looks very abnormal ... looks something like a spider 😞

I opened the Lens and give a swipe the mirror glass with microfiber cloth but still the spot is there.

The picture is Ok as its a problem of ViewFInder only.

Any suggestion?

Thanks in advance.

Regards.

Re: Canon 6D ViewFinder Spot

diverhank — Tue, 26 Jul 2016 20:20:53 GMT

Looks like a piece of lint stuck to the mirror or focus screen. I'd would get a rocket blower and blow it out of there (remove the lens and squirt air onto the mirror and surrounding area.

Whatever you do, don't physically touch the focus screen...it's incredibly fragile and will scractch easily, even with a blower's brush. I did this to my beloved 5D Mark III.

Re: Canon 6D ViewFinder Spot

Waddizzle — Wed, 27 Jul 2016 18:49:27 GMT

@diverhank wrote:
Looks like a piece of lint stuck to the mirror or focus screen. I'd would get a rocket blower and blow it out of there (remove the lens and squirt air onto the mirror and surrounding area.

Whatever you do, don't physically touch the focus screen...it's incredibly fragile and will scractch easily, even with a blower's brush. I did this to my beloved 5D Mark III.

The mirror is just as fragile and delicate as the focusing screen.

Re: Canon 6D ViewFinder Spot

jrhoffman75 — Wed, 27 Jul 2016 23:46:40 GMT

Best not to touch anything inside the mirror box. As suggested, use a rocket blower. Do not use canned air. Its a nuisnce, but as you obersrved, its not in the image path. Don't do more harm than good. If rocket blower won't remove it send it to a repair facility for cleaning or just live with it.

I send my camera in once a year for a cleaning and calibration.

Re: Canon 6D ViewFinder Spot

RobertTheFat — Thu, 28 Jul 2016 00:27:19 GMT

@jrhoffman75 wrote:
Best not to touch anything inside the mirror box. As suggested, use a rocket blower. Do not use canned air. Its a nuisnce, but as you obersrved, its not in the image path. Don't do more harm than good. If rocket blower won't remove it send it to a repair facility for cleaning or just live with it.

I send my camera in once a year for a cleaning and calibration.

I strongly second John's suggestion, probably because it's pretty much what I do. I try to get every camera and every lens through the Jamesburg shop every year or two. They come back looking and performing like new. If you have enough Canon equipment to qualify, join CPS as a Gold member; it gives you a break on the price of such maintenance.

Re: Canon 6D ViewFinder Spot

Peter — Sat, 30 Jul 2016 08:03:11 GMT

http://www.4photos.de/camera-diy/Lens-Fungus.jpg

Re: Canon 6D ViewFinder Spot

jrhoffman75 — Sat, 30 Jul 2016 10:43:09 GMT

OP says his images are fine. He only see it through viewfinder.

Re: Canon 6D ViewFinder Spot

Peter — Sat, 30 Jul 2016 10:46:41 GMT

Yes. Looks like fungus above the focus screen.

Re: Canon 6D ViewFinder Spot

sakibnaz — Sat, 30 Jul 2016 11:18:08 GMT

Thanks all.

Yes its fungus 😞

I'll change my focus screen of 6D.

Reagrds.

Re: Canon 6D ViewFinder Spot

jrhoffman75 — Sat, 30 Jul 2016 12:04:21 GMT

If it's in camera body you should have it checked by service. It might be elsewhere.

Re: Canon 6D ViewFinder Spot

sakibnaz — Fri, 02 Dec 2016 13:08:24 GMT

Hi All.

I have replced the focusing screen on the 6D and still the fungus is there. So its not in the focusing screen. Then I changed it back to the original focusing screen. So here my 6D's fungus is in Mirror Glass inside focusing screen.

Any advice how to fix it? Is it possible to replace the Mirrir Glass?

Thanks.

Re: Canon 6D ViewFinder Spot

Waddizzle — Fri, 02 Dec 2016 13:23:01 GMT

@sakibnaz wrote:
Hi All.

I have replced the focusing screen on the 6D and still the fungus is there. So its not in the focusing screen. Then I changed it back to the original focusing screen. So here my 6D's fungus is in Mirror Glass inside focusing screen.

Any advice how to fix it? Is it possible to replace the Mirrir Glass?

Thanks.

The mirror is a precisely aligned piece of equipment. I suggest that you let Canon clean it.

Re: Canon 6D ViewFinder Spot

lly3988 — Wed, 07 Dec 2016 14:22:48 GMT

If the fungus is not on the focusing screen or the mirror glass, it could be inside the view finder or the superimposed display screen which is behind the focusing screen. It is not difficult to remove but not easy to put it back in place.

Send the camera to Canon repair asap before the fungus spreads out in the camera..

Re: Canon 6D ViewFinder Spot

RobertTheFat — Sat, 03 Dec 2016 15:17:12 GMT

@lly3988 wrote:
If the fungus is not on the focusing screen or the mirrow glass, it could be inside the view finder or the superimposed display screen which is behind the focusing screen. It is not difficult to remove but not easy to put it back in place. ...

Not easy, but certainly not impossible. I've done it on two different DSLRs, back in the "Katzeye" days. It does require some manual dexterity, and having small fingers (as I do) probably helps.

But I think if I had it to do today, I'd follow your advice and send the camera back to Canon. They should at least know how to kill off the fungus without doing any further damage to the screen.

Re: Canon 6D ViewFinder Spot

sakibnaz — Sat, 03 Dec 2016 16:30:45 GMT

Hi.

The fungus is not in focusing screen. Initially when opened the lens I observed the fungus spot looks like in focusing screen. But when I opened the focusing screen then found the spot is mainly in the glass which is behind the focusing screen. Is it the mirror glass?

Is it possible to clean the fungus from the glass behind focusing screen? Or need to repalce the glass?

Tahnks.

Re: Canon 6D ViewFinder Spot

Waddizzle — Sat, 03 Dec 2016 17:08:28 GMT

@sakibnaz wrote:
Hi.

The fungus is not in focusing screen. Initially when opened the lens I observed the fungus spot looks like in focusing screen. But when I opened the focusing screen then found the spot is mainly in the glass which is behind the focusing screen. Is it the mirror glass?

Is it possible to clean the fungus from the glass behind focusing screen? Or need to repalce the glass?

Tahnks.

You need to let a professional do it. They can disassemble the parts, clean them separately, and re-align it all. Can you?

Re: Canon 6D ViewFinder Spot

lly3988 — Mon, 05 Dec 2016 18:14:45 GMT

Agreed. It's not impossible. One has to be careful to install the shims/spacers back in place. That's the only tricky part.

Removing molds/fungus from glass is easy. I used a 50/50 mixture of amonia and ~~nitrogen~~ hydrogen peroxide (see correction) and dip the elements into the solution and rub then a bit and the molds/fungus can normally be removed. (Molds/fungus will eat up the coatings of the glass if they have been there for too long)

Cleaning plastic screens with the above solution is not the right way. A blower will remove the dusts but any solutions like alcohol or the above mentioned mixture will leave behind streaks and rubbing will make thing worse. So the only way is to replace them. Cost of screen alone is inexpensive but the additional costs of postage, labor and time are really something.

So, unless you can handle it, send the camera to Canon repair facility for service. BTW, before sending the camera to Canon, after removing the focusing screen, give a few blows to the SD screen and see what's the difference.

Also, I suspect the fungus is inside the view finder, check out the last pic in the post attached

http://www.canonrumors.com/forum/index.php?topic=30851.0

@RobertTheFat wrote:
@lly3988 wrote:
If the fungus is not on the focusing screen or the mirrow glass, it could be inside the view finder or the superimposed display screen which is behind the focusing screen. It is not difficult to remove but not easy to put it back in place. ...

Not easy, but certainly not impossible. I've done it on two different DSLRs, back in the "Katzeye" days. It does require some manual dexterity, and having small fingers (as I do) probably helps.

But I think if I had it to do today, I'd follow your advice and send the camera back to Canon. They should at least know how to kill off the fungus without doing any further damage to the screen.

Re: Canon 6D ViewFinder Spot

kvbarkley — Mon, 05 Dec 2016 15:26:05 GMT

"Nitrogen peroxide"? https://pubchem.ncbi.nlm.nih.gov/compound/3032552#section=Top

Do you mean hydrogen peroxide?

This is one of those slips that can kill somebody.

Re: Canon 6D ViewFinder Spot

sakibnaz — Mon, 05 Dec 2016 15:27:45 GMT

Hi All.

Thanks for all the communication here.

Finally troday I cleaned by 6D Fungus on Mirror from a Canon authorised Service center 😉

Reagrds.

Re: Canon 6D ViewFinder Spot

RobertTheFat — Mon, 05 Dec 2016 16:27:13 GMT

@sakibnaz wrote:
Hi All.

Thanks for all the communication here.

Finally troday I cleaned by 6D Fungus on Mirror from a Canon authorised Service center 😉

Reagrds.

A wise decision, I think. A 6D is a good enough camera that one wants the job done right.