philslizzy
Joined: 07 Aug 2012
Posts: 4749
Location: Cheshire, England
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 Posted: Fri Jan 03, 2014 9:22 pm Post subject: |
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philslizzy wrote:
I use sprays for cleaning spectacle lenses. Alcohol is a solvent and may creep into a lens and damage the internals. Although the chances are it wont, just one instance will be too many.
Spectacle cleaner is basically water with a surfactant added (detergent) this is potentially less harmful than (edit:) Alcohol. Use it with a microfibre camera lens cloth.
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Last edited by philslizzy on Sat Jan 04, 2014 12:40 pm; edited 1 time in total |
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Lloydy
Joined: 02 Sep 2009
Posts: 7768
Location: Ironbridge. UK.
Expire: 2022-01-01
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| Posted: Fri Jan 03, 2014 11:47 pm Post subject: |
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Lloydy wrote:
| philslizzy wrote: |
I use sprays for cleaning spectacle lenses. Alcohol is a solvent and may creep into a lens and damage the internals. Although the chances are it wont, just one instance will be too many.
Spectacle cleaner is basically water with a surfactant added (detergent) this is potentially less harmful than water. Use it with a microfibre camera lens cloth. |
That's what I use. I've got a big bottle of commercial stuff - UVEX - that we had at work for cleaning safety glasses and when I checked it's the same stuff they sold in opticians for glasses. It's an isopropyl / water solution which works perfectly well.
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philslizzy
Joined: 07 Aug 2012
Posts: 4749
Location: Cheshire, England
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| Posted: Sat Jan 04, 2014 12:46 pm Post subject: |
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philslizzy wrote:
Of course a small 50ml refillable spray bottle with boiled water and a drop of dish washing liquid does the job perfectly.
The bottles are available at a pharmacy a drop means literally a drop. I put a smear on my finger, hold it over the bottle neck and shake. That is enough.
The washing liquid contains surfactants, these break down the surface tension of the water helping it to attach its self to dirt and helps you to cover the lens easily with the solution.
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visualopsins
Joined: 05 Mar 2009
Posts: 10362
Location: California
Expire: 2021-06-22
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| Posted: Sat Jan 04, 2014 4:50 pm Post subject: Re: Which liquid is safe for lens glasses cleaning ? |
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visualopsins wrote:
| check_box wrote: |
I have a small collection of MF len. I heard that alcohol is cheap liquid for cleaning dirty outer lens glass. Is it safe ? If it's not true . So which liquid is safe and useful for lens glasses cleaning ?
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Alcohol works fine, however, do not spray on lens -- use only a drop or two on microfiber cloth or earbud/q-tip.
Eclipse Lens Cleaning Fluid sold expensive in tiny bottles is actually only Reagent Grade Methanol, which can be purchased inexpensive by the liter from chemical supply store.
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Cameras: Sony A7Rii, Spotmatics II, F, and ESII, Nikon P4
M42 Asahi Optical Co., Lenses:
Takumar 1:4 f=35mm, 1:2 f=58mm (Sonnar), 1:2.4 f=58mm (Heliar), 1:2.2 f=55mm (Gaussian), 1:2.8 f=105mm (Model I), 1:2.8/105 (Model II), 1:5.6/200
Tele-Takumar 1:5.6/200, 1:6.3/300
Macro-Takumar 1:4/50
Auto-Takumar 1:2.3 f=35, 1:1.8 f=55mm, 1:2.2 f=55mm
Super-TAKUMAR 1:3.5/28 (fat), 1:2/35 (Fat), 1:1.4/50 (8-element),
Super-Multi-Coated Fisheye-TAKUMAR 1:4/17
Super-Multi-Coated TAKUMAR 1:4.5/20, 1:3.5/24, 1:3.5/28, 1:2/35, 1:3.5/35, 1:1.8/85, 1:1.9/85 1:2.8/105, 1:3.5/135, 1:2.5/135 (II), 1:4/150, 1:4/200, 1:4/300, 1:4.5/500
Super-Multi-Coated Macro-TAKUMAR 1:4/50, 1:4/100
Super-Multi-Coated Bellows-TAKUMAR 1:4/100
SMC TAKUMAR 1:1.4/50, 1:1.8/55
Other lenses:
Carl Zeiss Jena Flektogon 2.4/35
SMC PENTAX ZOOM 1:3.5 35~105mm, SMC PENTAX ZOOM 1:4 45~125mm
Nikon Micro-NIKKOR-P-C Auto 1:3.5 f=55mm, NIKKOR-P Auto 105mm f/2.5 Pre-AI (Sonnar), Micro-NIKKOR 105mm 1:4 AI, NIKKOR AI-S 35-135mm f/3,5-4,5
Tamron SP 17mm f/3.5 (51B), Tamron SP 17mm f/3.5 (51BB), SP 500mm f/8 (55BB), SP 70-210mm f/3.5 (19AH)
Vivitar 100mm 1:2.8 MC 1:1 Macro Telephoto
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