OK, thanks
On Sat, Jan 30, 2010 at 8:43 PM, Chuck Norcutt <
chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
> To be honest I don't know if it "evaporates". But I do know that it
> eventually disappears along with the Ronsonol which does evaporate. So
> I don't know what else to call it but the important point is that the
> oil disappears and the diaphragm starts to work again when it's dry.
>
> I learned this trick from Thomas Tomosy in his 2 book set on camera
> repair. He recommends it as a quick and easy repair that may just last
> a very long time.
> <
> http://www.amazon.com/Camera-Maintenance-Repair-Book-Comprehensive/dp/0936262869/ref=sr_1_3?ie=UTF8&s=books&qid=1264880312&sr=8-3
> >
> <
> http://www.amazon.com/Camera-Maintenance-Repair-Book-Comprehensive/dp/0936262583/ref=sr_1_2?ie=UTF8&s=books&qid=1264880435&sr=8-2
> >
> He also has books specific to Nikon, Leica and restoration of classic
> and collectible cameras.
>
> Chuck Norcutt
>
>
> Jez Cunningham wrote:
> > " the oil evaporates with the Ronsonol"
> > Does it really? Just wondering...
> > Jez
> >
> > On Sat, Jan 30, 2010 at 4:06 AM, Chuck Norcutt <
> > chucknorcutt@xxxxxxxxxxxxxxxx> wrote:
> >
> >> Yes, lighter fluid works well. Ronsonol is suggested since it is pure
> >> naptha and also comes in a small can with a pinhole spout which makes it
> >> easy to dispense small amounts.
> >>
> >> I don't know anything about the 50 FD lens but it's sometimes possible
> >> to just remove either the front or rear group of elements without
> >> disassembling the whole lens. On some lenses it's fairly easy to remove
> >> the entire rear group by unscrewing a single cell. That allows you to
> >> reach in with a tool and drop bits of Ronsonol on the diaphragm and
> >> start trying to work it to free it. Of course you may have to do this
> >> 100 times but eventually it comes free and the oil evaporates with the
> >> Ronsonol. Be sure to hold the lens level so you don't drop Ronsonol all
> >> the way through to the back of the front group.
> >>
> >> Without a total disassembly, cleaning and re-greasing of the helix
> >> eventually the problem of migrating oil will return. But you might get
> >> several years use out of it before that happens.
> >>
> >> Chuck Norcutt
> >>
> >>
> >>
> >> AS wrote:
> >>> I want to take apart a 50mm lens which has stuck blades. Before
> >>> jumping into this I wanted to find out if lighter fluid is the catch
> >>> all solution to fixing stuck blades. Is there anything else that I
> >>> should look for? I'll be working with a Canon FD 50 lens.
> >>>
> >>>
> >>>
> >> --
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