" 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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