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Standard User Basenji
(fountain of knowledge) Tue 17-Jan-12 22:05:46
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Lens cleaning help - Smudge on a EOS 1100D lens


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Hi folks,

I got myself a EOS1100D a couple of weeks ago and lent it to a friend, who wanted to take some pics of their kids, but when I got it back, I found there's a small (about 1-1.5cm) smudge on the lens, at approximately 7 o'clock. frown

I have never cleaned a lens before, so would appreciate any help here - I've checked youtube, but to be honest, I don't feel confident in doing it myself. frown If I take the lens to my local Jessops store and buy the relevant kit, will they clean the lens for me?

Many thanks. smile

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Edited by Basenji (Tue 17-Jan-12 22:10:46)

Standard User jimholder
(newbie) Wed 18-Jan-12 09:21:20
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Re: Lens cleaning help - Smudge on a EOS 1100D lens


[re: Basenji] [link to this post]
 
Is it a smudge on the outside of the lens? Buy a lens cleaning cloth and rocket blower. Blow away any dust breathe on the lens and polish clean. The glass is quite robust, you just need to make certain there is no microscopic solid matter between cloth and lens. Do not go to Jessops unless where you live it is manned by photographers. Take a look at http://photography-on-the.net/forum/search.php?searc... You'll be most welcome there!
Standard User radiomarko
(experienced) Wed 18-Jan-12 09:43:25
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Re: Lens cleaning help - Smudge on a EOS 1100D lens


[re: Basenji] [link to this post]
 
If you are in the habit of loaning I recommend fitting a UV lens filter (buy a quality item not a £10 cheapo), protects the lens front element. Other people may not be as careful as you are with your camera!

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Standard User Basenji
(fountain of knowledge) Wed 18-Jan-12 11:41:25
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Re: Lens cleaning help - Smudge on a EOS 1100D lens


[re: radiomarko] [link to this post]
 
In reply to a post by radiomarko:
If you are in the habit of loaning I recommend fitting a UV lens filter (buy a quality item not a £10 cheapo), protects the lens front element. Other people may not be as careful as you are with your camera!
Thanks for that advice. I'm not "in the habit" of loaning my kit; I was simply helping a friend out of a tight spot. Nonetheless, lesson learned.

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Standard User Basenji
(fountain of knowledge) Wed 18-Jan-12 11:49:11
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Re: Lens cleaning help - Smudge on a EOS 1100D lens


[re: jimholder] [link to this post]
 
In reply to a post by jimholder:
Is it a smudge on the outside of the lens? Buy a lens cleaning cloth and rocket blower. Blow away any dust breathe on the lens and polish clean. The glass is quite robust, you just need to make certain there is no microscopic solid matter between cloth and lens. Do not go to Jessops unless where you live it is manned by photographers. Take a look at http://photography-on-the.net/forum/search.php?searc... You'll be most welcome there!
Hi there,

Yes, the smudge is on the outside of the front lens; a smallish fingerprint type mark, which, as I stated in my OP, is about 1-1.5cm across and positioned at about 7 o'clock on the lens surface.
From what I can tell from doing a few test shots, the smudge doesn't seem to affect the lens - I've taken a few pics and blown them up on screen to very high percentages in GIMP and preview and to my eye at least, there's no noticeable deterioration in IQ.
That having been said, I still think the lens would benefit from a thorough cleaning, just to err on the side of caution.

Unfortunately, I don't know of any other camera shops in my vicinity, so Jessops will have to suffice in this instance. Your link wouldn't let me view any search matches. frown

Thanks for your help - It is greatly appreciated. smile

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Standard User git
(experienced) Fri 20-Jan-12 12:43:23
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Re: Lens cleaning help - Smudge on a EOS 1100D lens


[re: radiomarko] [link to this post]
 
Good advice if you are not confident cleaning your kit, tend to use it in dusty environments, or you just enjoy piece of mind.
Standard User micksharpe
(eat-sleep-adslguide) Fri 20-Jan-12 13:07:35
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Re: Lens cleaning help - Smudge on a EOS 1100D lens


[re: Basenji] [link to this post]
 
Too much cleaning may damage your lenses by removing anti-glare coatings and causing micro-scratches. These will degrade image quality far more than the odd smudge or bit of dust, and the effects are permanent. Smudges towards the edge of a lens will have very little effect on image quality. Clean your lenses only when absolutely necessary and protect them with filters (and lens caps) at all times.

I use isopropyl alcohol and lens tissues to clean my lenses. You should be able to get both from a decent chemist. Wet the lens with alcohol and drag the edge of a tissue across the lens to collect the alcohol and dissolved dirt. Never clean a lens with the surface of a tissue. I have yet to clean the lenses for my Pentax K10D. I learnt my lessons the hard way. blush

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Edited by micksharpe (Fri 20-Jan-12 13:19:08)

Standard User MHC
(legend) Fri 20-Jan-12 13:29:16
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Re: Lens cleaning help - Smudge on a EOS 1100D lens


[re: radiomarko] [link to this post]
 
A UV is one solution, but it is suggested that it can have an adverse effect. I tend to use the Protector filters - which are plain glass and marginally cheaper with Hoya Pro 1 Protector at around £25 and UV nearly £30.

The only one of mine which I have not changed is a 400-600 zoom which still has an S1B as the cost of a Protector is around £150 and UV even more!





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Standard User blfamily
(eat-sleep-adslguide) Fri 27-Jan-12 21:14:30
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Re: Lens cleaning help - Smudge on a EOS 1100D lens


[re: Basenji] [link to this post]
 
See here http://www.warehouseexpress.com/lcd-and-lens-cleanin...

Plenty to choose from.

Steve

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Standard User Basenji
(fountain of knowledge) Fri 27-Jan-12 21:52:06
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Re: Lens cleaning help - Smudge on a EOS 1100D lens


[re: blfamily] [link to this post]
 
In reply to a post by blfamily:
See here http://www.warehouseexpress.com/lcd-and-lens-cleanin...

Plenty to choose from.
Hi there,
Thanks for the link. smile Bookmarked for future reference. smile

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Standard User git
(experienced) Fri 27-Jan-12 22:01:56
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Re: Lens cleaning help - Smudge on a EOS 1100D lens


[re: Basenji] [link to this post]
 
I'd be tempted not to try and clean a smudge that will have no effect on image quality, for the simple reason that the more times you do this the more chance there is of rubbing a piece of grit across the front of the lens and scratching it. If cleanliness is important, and to some degree it should be, get yourself a uv filter, then clean the smudge and apply the uv filter immediatly. I've cleaned the sensor on my EOS before, and I'm not squeamish about doing what needs to be done, but I also believe in minimising risk, particularly if you are not familiar with the processes involved. Once youve cleaned half a ton of assorted dirt, watermarks and other assorted gubbins off the front of the uv filter then you might be in a better position to look at contact cleaning the lens itself.
Standard User JPL
(member) Sat 28-Jan-12 10:23:35
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Re: Lens cleaning help - Smudge on a EOS 1100D lens


[re: git] [link to this post]
 
Yes, but be certain there are no chemicals in the grease/sweat of the smudge that might over time damage the surface of the coating.

JPL
Standard User Alnath
(fountain of knowledge) Sat 28-Jan-12 11:09:56
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Re: Lens cleaning help - Smudge on a EOS 1100D lens


[re: Basenji] [link to this post]
 
Ive just my breath and my T-Shirt even on my L lenses when im out and about and nothing bad has happend. Other than that i use a bog standard lens cloth that you can get from the opticians.
Standard User john2007
(legend) Sat 28-Jan-12 15:43:09
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Re: Lens cleaning help - Smudge on a EOS 1100D lens


[re: Alnath] [link to this post]
 
Ditto. I'm afraid I've proved again and again that the quality of the kit is much better than my ability to use it.

In the OP's case I'd use isopropyl and a microfibre cloth. Failing that Fairy Liquid diluted and a tissue.
Standard User SPOOKish
(fountain of knowledge) Wed 07-Mar-12 04:15:41
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Re: Lens cleaning help - Smudge on a EOS 1100D lens


[re: Basenji] [link to this post]
 
My own solution (links just quickly googled for example purposes):

Something like this (available at all good opticians): glasses cleaner

And some very soft lens/glasses cleaning cloths.

No need to spend loads of money or worry about damaging lenses by destroying any coatings. The type of solution used for cleaning glasses really is just very dilute washing up detergent and if you have two glass cleaning cloths, you can use one for wet dirt removal and the other for drying and polishing.

Some other advice:

http://www.howtocleanstuff.net/how-to-clean-eye-glas...

Importantly, never use dry facial (or other) tissue - their fibers are too coarse. It's mainly only at higher aperture values that specks of dust/dirt smudges really impact on image quality. You can experiment yourself by selecting aperture values above f10. Wide open, you will hardly notice.

Be ultra careful if ever you decide to clean the inside of the 'Through The Lens'/TTL camera viewfinder above the mirror. This is actually the focusing screen and is made of very soft plastic which scratches extremely easily. Just light fingernail pressure can permanently mark it. Not all focusing screens are user replaceable and cost upwards of £30 (plus any labour charges etc).

Try not to be too obsessive; all camera gear (in my view) is meant to be used and to an extent, abused. Any filters on the front of lenses can diminish image quality if not of pro standard. I think they can be good for certain environments but they can trap dust between the lens and the filter so can be a pain. Fitting a lens hood is a good way to protect lenses from scratching.
Standard User Basenji
(fountain of knowledge) Wed 07-Mar-12 16:51:06
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Re: Lens cleaning help - Smudge on a EOS 1100D lens


[re: SPOOKish] [link to this post]
 
Many thanks for that. smile It makes a very interesting read and I have gained a few useful tips from those links. smile

Most greatly appreciated. laugh
In reply to a post by SPOOKish:
My own solution (links just quickly googled for example purposes):

Something like this (available at all good opticians): glasses cleaner

And some very soft lens/glasses cleaning cloths.

No need to spend loads of money or worry about damaging lenses by destroying any coatings. The type of solution used for cleaning glasses really is just very dilute washing up detergent and if you have two glass cleaning cloths, you can use one for wet dirt removal and the other for drying and polishing.

Some other advice:

http://www.howtocleanstuff.net/how-to-clean-eye-glas...

Importantly, never use dry facial (or other) tissue - their fibers are too coarse. It's mainly only at higher aperture values that specks of dust/dirt smudges really impact on image quality. You can experiment yourself by selecting aperture values above f10. Wide open, you will hardly notice.

Be ultra careful if ever you decide to clean the inside of the 'Through The Lens'/TTL camera viewfinder above the mirror. This is actually the focusing screen and is made of very soft plastic which scratches extremely easily. Just light fingernail pressure can permanently mark it. Not all focusing screens are user replaceable and cost upwards of £30 (plus any labour charges etc).

Try not to be too obsessive; all camera gear (in my view) is meant to be used and to an extent, abused. Any filters on the front of lenses can diminish image quality if not of pro standard. I think they can be good for certain environments but they can trap dust between the lens and the filter so can be a pain. Fitting a lens hood is a good way to protect lenses from scratching.


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Standard User SPOOKish
(fountain of knowledge) Thu 08-Mar-12 00:51:36
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Re: Lens cleaning help - Smudge on a EOS 1100D lens


[re: Basenji] [link to this post]
 
You welcome. Glad you found it useful. smile
Standard User Lazza
(fountain of knowledge) Sat 17-Mar-12 09:28:39
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Re: Lens cleaning help - Smudge on a EOS 1100D lens


[re: Basenji] [link to this post]
 
By far the best investment I have made in photo gear in recent years was purchasing a Lenspen - http://www.lenspen.com/?resultType=category&params=9...

http://www.amazon.co.uk/Lenspen-LP-1-Original/dp/B00...

Peanuts to buy, lasts for years and totally safe to use. Oh yeah, it just darn works better and quicker than ANY other method and I've tried them all over the last 40+ years. I have yet to see any other method that is quicker or more efficient. Use them on my Leica lenses with no trepidation whatsoever so cannot speak higher about the LensPen than that. smile

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