lo_pak

回復 10# 快樂牛郎

The $3 one you have just mentioned is rubbing alcohol or no-name lens cleaning fluid?

siumaibb

lense or uv filter?

i use lense pen for lenses. 菊花牌底衫 for filters.

lo_pak

回復 12# siumaibb

Lenspen is only good when they are new...

快樂牛郎

回復  快樂牛郎

The $3 one you have just mentioned is rubbing alcohol or no-name lens cleaning flui ...
lo_pak 發表於 2011/5/27 08:41

90% - 98% rubbing alcohol

they say the higher purity the better
but i found 90% working better than 98%

lo_pak

回復 14# 快樂牛郎

For rubbing alcohol most of them contain 70% isopropyl alcohol and 30% distilled water.

Are you adding 10% distilled water to make it 90% rubbing alcohol?

快樂牛郎

回復  快樂牛郎

For rubbing alcohol most of them contain 70% isopropyl alcohol and 30% distilled wa ...
lo_pak 發表於 2011/5/27 09:33

I actually meant 90% isopropyl alcohol
if that's no longer "rubbing", then excuse my english

lo_pak

回復 16# 快樂牛郎

Thanks...
BTW, posts on some photography forums suggest that don't use pure methanol or isopropyl alcohol, they are just too strong to dissolve the glue between the lens and the barrel.

快樂牛郎

回復  快樂牛郎

Thanks...
BTW, posts on some photography forums suggest that don't use pure methano ...
lo_pak 發表於 2011/5/27 09:50

not sure about methanol but isopropyl alcohol is not a strong/corrosive chemical

Leica uses 100% isopropyl alcohol themselves on their gears