[LRflex] Re: formula for lens cleaning fluid

Thanks for the tip.
Now, why the reluctance to use filters ? Do you actually they'll reduce the 
performance of your R lenses ?
I know that filters represent another pair of optical surfaces but, when your 
lenses are big-time expensive, would you not think that the trade off is worth 
protecting that front element from dust, accidental abrasion, possible damage 
from pollutants in the air and so on ? Also, a skylite or UV does filter out 
wavelengths that lie outside the visible range and which can alter the response 
of some films.
Anyone aware of studies or tests done on the subject ? 
Dave


________________________________
From: Bob Shaw <rsphotoimages@xxxxxxxxxxx>
To: leicareflex@xxxxxxxxxxxxx
Sent: Sun, January 17, 2010 11:46:28 AM
Subject: [LRflex] Re: formula for lens cleaning fluid

Avout 5 months ago I decided to try a gel product called "Blu Goo" on my coated 
eyeglasses.
www.blugoo.com/

Superb results and absolutely no scratches to the anti-glare coating .  They 
provide their own washable (blue, of course) microfiber cloth.

I use my fingertips (after bath or shower so skin is soft) to apply, just a 
tiny amount out of the tiny jar.  Sort of like applying automobile wax with 
your index finger tip.

Then remove the dried film using the cloth.  We're talking about 60 seconds for 
the whole process, here.  There appears to be no polymerization on the lens 
surface after cleaning.  The product is water-based and contains none of the 
usual no-no ingredients.

If you need to know more, go here:  www.blugoo.com/

I've considered using on filters but am not going to use on my R lenses until I 
hear from someone else who has.  Cluck-cluck-cluck...big chicken, here.

As to microfiber; I never use it on those rare occasions when I must clean 
lenses. 

I  do the "breath vapor" thing, then gently rub with a very old tight-weave 
(therefore pretty much lint-free) cotton dish towel that has been washed 
repeatedly (maybe 50+ times over the past several years).  I always have one 
clean old dish towel available for that purpose only.

Thing about microfiber is that it is not very absorbent (try drying wine 
glasses with a microfiber towel if you don't believe me).  Also it seems that 
there are different grades which actually can scratch.  Sort of a polymeric 
crap shoot.

Probably better for outer garments than for cleaning fine (read as, 
Leica/Contax/etc.) optics.

I now deactivate my Obsessive-Compulsive Module and yield to the Forum on this 
topic.


Bob



Bob Shaw
rsphotoimages@xxxxxxxxxxx


On Jan 16, 2010, at 10:21 AM, David Simms wrote:

> I couldn't agree more; less is more. Even least may be too much. I'm not as 
> hung up on cleaning filters though. I'll probably email Gerry Smith, the 
> Canadian dean of Leica repair, to get his input, just to be sure.
> cheers
> Dave
> 
> 
> 
> 
> ________________________________
> From: Sonny Carter <sonc.hegr@xxxxxxxxx>
> To: leicareflex@xxxxxxxxxxxxx
> Sent: Sat, January 16, 2010 10:01:10 AM
> Subject: [LRflex] Re: formula for lens cleaning fluid
> 
> On Sat, Jan 16, 2010 at 11:51 AM, David Simms <simmszee@xxxxxxxx> wrote:
>> Hmmmm. Is it capable of cleaning the lettering, for instance on a Leica
>> lens ?
>> I think I'd find myself being somewhat squeamish about using it on optical
>> surfaces although the (possible) Leica-sanctioned mixture that I mentioned
>> would probably not be much less nasty.
>> Thanks
>> Dave
>> 
> 
> I dunno, many of the older lens components were cemented with  organic
> materials.
> 
> As far as buying, fixing up and selling, how do you know the long term
> effects of lighter fluid on the lenses?  You don't have them any more.
> 
> I think I'd just be careful.  Less is more with lenses.
> 
> -- 
> Regards,
> 
> Sonny
> http://www.sonc.com
> http://sonc.stumbleupon.com/
> Natchitoches, Louisiana
> (+31.754164,-093.099080)
> 
> USA
> 
> 
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