Blob in viewfinder

DorsetDude

DorsetDude

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Keith
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Hi all

Ive noticed a rather large blob/dot in my viewfinder. Its not there in Live view and doesnt appear on the photographs. Any idea what bit needs cleaning? And how?:help:

I have Canon EOS 450D, have only used lens cloths on the outer surface of lenses so far and try not to do that often, always replace lens cap when not in use and Im pretty careful when changing lenses to keep all orifices pointing downwards and do it quick.

Thanks.
 
By the sound of it, the blob maybe inside the viewfinder or mirror. It will not affect picture quality though it could be annoying sometimes. Unmount your lens and look at the mirror, but before you do so, switch your camera off first. If its there, a rocket blower will help.
 
strobemonkey said:
By the sound of it, the blob maybe inside the viewfinder or mirror. It will not affect picture quality though it could be annoying sometimes. Unmount your lens and look at the mirror, but before you do so, switch your camera off first. If its there, a rocket blower will help.
Click to expand...
Yup - and don't be tempted to touch the mirror, it's silvered on the top surface so can be scratched easily. Just use a rocket blower.

Your blob might also be on or in in the viewfinder assembly above the mirror, so give that a good blow while you're at it.
 
Be very carefull not to do any damage to the focusing screen either. They are easy to scratch and although user replaceable are about £30
 
Thanks all, I dont own a blower of any sort though, sounds like I ought to get one.

Any advice on one? Jessops? Amazon?

Thanks.
 
DorsetDude said:
Thanks all, I dont own a blower of any sort though, sounds like I ought to get one.

Any advice on one? Jessops? Amazon?

Thanks.
Click to expand...

Amazon £8 http://www.amazon.co.uk/Giottos-GTAA1900-Rocket-Air-Blower/dp/B00017LSPI

The dirt will almost certainly be on the underside of the focusing screen, just above the mirror. Anything on the mirror is so out of focus it's invisible. Usually very easy to get off, but don't get too obsessive about it. A certain amount of dirt is inevitable when you change lenses, and rather on the focusing screen than on the sensor.

Turn the camera upsidedown and give it a very careful squirt with the blower. The focusing screen is very delicate and easy to mark permanently if you scuff the surface.
 
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