MarkP Posted December 3, 2011 Share #41 Posted December 3, 2011 Advertisement (gone after registration) Overkill - just lick them Haven't you found the Dremel particularly useful for more persistent markings... on the lens that is, not the tongue:eek: Link to post Share on other sites More sharing options...
Advertisement Posted December 3, 2011 Posted December 3, 2011 Hi MarkP, Take a look here how to keep m lenses clean. I'm sure you'll find what you were looking for!
giordano Posted December 3, 2011 Share #42 Posted December 3, 2011 I've decided to put my money where my mouth is and I'm making a video showing my 35mm Summilux FLE being cleaned with a green Scotch Brite pad. I'll put it up in the LUF "Video" sub-forum as soon as I get my new M10. Don't do it for my sake! Link to post Share on other sites More sharing options...
bpalme Posted December 3, 2011 Share #43 Posted December 3, 2011 Don't do it for my sake! Yeah, mine either. LOL..Funny how threads around here degrade to this when all the OP is asking is about your cleaning routine. Link to post Share on other sites More sharing options...
brill64 Posted December 4, 2011 Share #44 Posted December 4, 2011 sweat contains sodium, potassium chlorides (salts), urea, hydrogen ion (acidic), sebum (grease) - all of which can damage protein coatings and cotton can harbour fungus, mold, bacteria and other nasties such as grit or dust, washing or conditioner residues that will remain on and eat away at a lens coating over time. dry sweat chrystalizes.... that's why i never use a tee-shirt to clean the front element of a lens. one drop of human saliva at body temperature contains a million bacteria, it's alkaline, meaning it will denature (damage) the protein coating and can affect the optic so i don't blow on it either:rolleyes: Link to post Share on other sites More sharing options...
masjah Posted December 4, 2011 Share #45 Posted December 4, 2011 sweat contains sodium, potassium chlorides (salts), urea, hydrogen ion (acidic), sebum (grease) - all of which can damage protein coatings and cotton can harbour fungus, mold, bacteria and other nasties such as grit or dust, washing or conditioner residues that will remain on and eat away at a lens coating over time. dry sweat chrystalizes.... that's why i never use a tee-shirt to clean the front element of a lens. one drop of human saliva at body temperature contains a million bacteria, it's alkaline, meaning it will denature (damage) the protein coating and can affect the optic so i don't blow on it either:rolleyes: I'd honestly no idea that at least some lens coatings were protein based - can you give more details? Link to post Share on other sites More sharing options...
jaapv Posted December 4, 2011 Share #46 Posted December 4, 2011 They are not - they are inorganic compounds that are vaporized onto the lens, usually MgF for the first layer and assorted oxides and fluorides for the following layers. This is the USA patent for multicoating Patent number: 3185020 Filing date: 7 Sep 1961 Issue date: 25 May 1965 http://www.google.nl/patents?hl=nl&lr=&vid=USPAT3185020&id=z44aAAAAEBAJ&oi=fnd&dq=coating+magnesium+fluoride&printsec=abstract#v=onepage&q=coating%20magnesium%20fluoride&f=false Link to post Share on other sites More sharing options...
masjah Posted December 4, 2011 Share #47 Posted December 4, 2011 Advertisement (gone after registration) They are not - they are inorganic compounds that are vaporized onto the lens, usually MgFfor the first layer and assorted oxides and fluorides for the following layers. This is the USA patent for multicoating Patent number: 3185020 Filing date: 7 Sep 1961 Issue date: 25 May 1965 THREE LAYER ANTI-REFLECTION COATING - Google Patents Many thanks Jaap - that is pretty well what my understanding was. Link to post Share on other sites More sharing options...
lars_bergquist Posted December 4, 2011 Share #48 Posted December 4, 2011 That has been well known at least since 1945 (The first patent, by Carl Zeiss in 1935, was kept secret for reasons of military security). The old man from way back then Link to post Share on other sites More sharing options...
jaapv Posted December 4, 2011 Share #49 Posted December 4, 2011 Multicoating? That dates back to the 1960ies if I recall correctly. Link to post Share on other sites More sharing options...
andym911 Posted December 4, 2011 Share #50 Posted December 4, 2011 Just use the lenses and don't worry too much about a bit of dust or grime....I clean mine maybe once a year at most..and then with whatever is at hand as long as it is clean and soft. Have never used any liquid apart from my own breath and all is well. If you are paranoid about it just stick a filter on each lens and you will never have to clean them. In short don't over clean...much worse than not cleaning at all. I have same approach to the sensor....must be 3 years now and have never cleaned it....never seen the need to be honest and "if it ain't broke don't fix it" is good advice, others will tell you differently of course...just my opinion. Andy Link to post Share on other sites More sharing options...
Rick Posted December 5, 2011 Share #51 Posted December 5, 2011 Now for something completely different. When I got my M9 I cleaned the sensor with a sample of a cleaner I got from Crizal for use on AR coated glasses. Crizal makes AR coatings for glasses. The cleaner seems to have some sort of wax-like ingredient in it that was evident to me when using it on glasses. It sort of polishes glasses like waxing a car. I thought this would be perfect for protecting the sensor from dust and oil. So, I tried it on my M9 and haven't had to clean the sensor since. It did take a bit of "polishing" to get it right. I remember being a little worried at first when it streaked the sensor. But, I used a Dacron tip applicator (Q-tip) and carefully polished the sensor. That was over a year ago. I really think I'm on to something. Link to post Share on other sites More sharing options...
brill64 Posted December 5, 2011 Share #52 Posted December 5, 2011 I'd honestly no idea that at least some lens coatings were protein based - can you give more details? sorry, i'm not 100% sure, to be honest either but hopefully people would consider suggesting different options to wiping the front element of their noctilux with something other than the corner of a tee-shirt. Link to post Share on other sites More sharing options...
Ellie Posted December 5, 2011 Share #53 Posted December 5, 2011 Hi, could anyone identify if this is dust on front lens element? There are 3 birds and 2 dark spots in this picture, and I could not see any spots in pictures taken earlier that day. It was taken against the sun at f/13 Welcome, dear visitor! As registered member you'd see an image here… Simply register for free here – We are always happy to welcome new members! Link to post Share on other sites Simply register for free here – We are always happy to welcome new members! ' data-webShareUrl='https://www.l-camera-forum.com/topic/167658-how-to-keep-m-lenses-clean/?do=findComment&comment=1862864'>More sharing options...
k_g_wolf ✝ Posted December 5, 2011 Share #54 Posted December 5, 2011 You better start a NEW thread with this photo, Ellie. You could generate hundreds of replies, because this would most likely lead away from lenscleaning and more to sensorcleaning. Or bird-stamping, whatever you like best. No dust at all on the lens, as far as I can see. best GEORG Link to post Share on other sites More sharing options...
Double Negative Posted December 5, 2011 Share #55 Posted December 5, 2011 Hi, could anyone identify if this is dust on front lens element? There are 3 birds and 2 dark spots in this picture, and I could not see any spots in pictures taken earlier that day. It was taken against the sun at f/13 You will NOT see "dust on the lens." It's far too out of focus to ever be seen unless you've got a large (and I mean large) chunk of something sitting there. What's in your photo is dust on the SENSOR. Link to post Share on other sites More sharing options...
vanhulsenbeek Posted December 8, 2011 Share #56 Posted December 8, 2011 Spittle and a (clean and old) T-shirt; that will do it! Link to post Share on other sites More sharing options...
Double Negative Posted December 8, 2011 Share #57 Posted December 8, 2011 I don't know about anyone else, but I'm taking notes of who - and who NOT to buy used lenses from... (kidding) Link to post Share on other sites More sharing options...
wlaidlaw Posted December 8, 2011 Share #58 Posted December 8, 2011 Many microfiber cloths instructions mention washing them periodically, which I do in order to remove what might be trapped in the cloth. Remember not to put in clothes conditioner (Comfort etc) or use a detergent already containing these products. I washed my micro fibre cloths (Zeiss and 3M mirror cloths) in with the normal wash. I use these for all sorts of things, like the glossy glass front on our flat screen TV, our various Macs, iPad and iPhones as well as camera purposes. After a wash with Comfort, they were absolutely useless and left a smear on everything they touched. It needed two plain washes at high temperature before they were of any use again. For those occasions, when you get something grungy or sea spray on the front of one of my lenses, I like Zeiss lens fluid. Wilson Link to post Share on other sites More sharing options...
pico Posted December 8, 2011 Share #59 Posted December 8, 2011 [...]one drop of human saliva at body temperature contains a million bacteria, it's alkaline, meaning it will denature (damage) the protein coating and can affect the optic so i don't blow on it either:rolleyes: Take my tip: rinse your mouth thoroughly with Vodka, swallow, then blow. I lucked out and got a case of 12" square microfiber cloths from a vinyl collector (that's LP records). I throw them away when dirty. You can find such in some industrial supply houses. Link to post Share on other sites More sharing options...
Double Negative Posted December 8, 2011 Share #60 Posted December 8, 2011 Take my tip: rinse your mouth thoroughly with Vodka, swallow, then blow. I'm gonna leave that one alone... Link to post Share on other sites More sharing options...
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