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With re cementing elements back together you're basically working with two elements that have already been optically aligned
and post finished ( edge grinding, etc. ) you just want a jig to hold...

There is a slight eccentricity of the lens elements, but I don't think that doublet is final, it may be destined for
more grinding if it were to be a final lens or not it was a demo more of the...

Ouch !!

Plain old plaster of paris to use as a jig for lens alignment is such a bad idea, all gypsum products expand as they set ( from exotherm ) your jig will be loose fitting
and if your plaster mix...

You can always replace the bad wiring if you're handy at that, and even if you're not.
Most of that wiring is prety simple, just do one wire at a time, just make sure it's unplugged. ;)

It's important to know that gear teeth aren't triangular, with involute spur gears there is a curve to them to allow it the tooth to clear the mating tooth,
the banding is very regular which makes...

Nice job !
I think based on the pictures posted the teeth form on the gears aren't correct, that could be where your banding is coming from.

Hi John,
Powdered graphite would work too, I prefer the spray, the particles in the spray seems finer, both are messy.
JimC

You've recemented lens elements, this way less complicated to me :)

The red rubber hose looks crispy to me, it might be leaking from a crack somewhere on the hose causing pressure loss
I'd check that first. Especially near the nipple at the bottom of the piston.
...

If it was an expensive lens return it, otherwise repair it, getting the aperture blades back in place takes a lot of patience.
Tweezers, dental tools are a must for manipulating the last few blades...

Those blades look pretty bad, the raised rust spots might have rusted thru given how thin shutter blades are
the rest looks like surface rust.

I agree with Vaughan about converting the rust, you...

Finally got around to checking mine, it's a 1-80 screw.

If you can't find them in hardware stores try hobby shops, there's a brand called Hob-Bits
they have 4 to 6 screws pre packaged and nuts of...

I understand the need to find relatively inexpensive lightweight materials to build ULF cams but you have to undetand that all the
'resistance' that the Ultra Gator board has is under the conditions...

I've used both, not for camera building, nether are really suitable for ULF camera building.
Sintra is moderately foamed PVC board, normally used in CNC sign making, it's heavy,
and flexy, some...

Identify which style Gralab 300 you have, the earlier ones were steel cased with steel hands tipped
with glow in the dark paint, the later ones were plastic case and plastic glow in the dark arms....

I don't have experience with that particular style wrench but I have used similar pin spanner wrenches
when I service my metalworking machines. To me those are preferrable over the H style wrenches...

If you look thru the holes in the rack, the pinion gear shaft runs the width of the camera,
it looks like there is room in there for mechanical locking mechanism that would grip the shaft to lock...

The springyness of the compressed bellows to extended cause the drift in focus,
there isn't a lock for the focusing rack and pinion.
You can try extending the bellows out all the way to relax the...

Neal's link is a good one for the grab bag of screws, but if you're looking for a specific style ( slotted head vs phillips )
you might be dissapointed, and you'll need a thread checker too.
...

I had seen that link but I never investigated it further than the home page, looking at it again
in their company history they are the same company but no longer involved with photographic...

Does anyone know anything or have a link for Bilora tripods ?

Most of what I've been able to find is their small tripods, but I can't seem to find
a company website , are they even still in...

Doremus has covered it nicely, I think that if you're interested in 'dabbling' set a budget you're
willing to spend ( camera, lens, film holders, film developing chems and equipment ) and proceed...

I have no experience with this particular lens but you may want to look for tiny jam screws that may have been painted over.
Another thought is that the glamour ring is what holds the front group in.

Reading the listing the seller states that there is cracking on the bellows but are light tight.
It does looks kind of nice, if you buy it replace the bellows.

Thanks for the clairifcation of 138S, I'm not familar with Durst model numbers.

If the film is viable, aside from trying it with a low contrast developer, you could use it
for printing masks (...

Closest I could find, and the specs match, is this -

https://www.gwjcompany.com/index.php?main_page=product_info&products_id=2419

I'm curious, what is your L138S ?

If it's black lines, use a rapidograph ( anyone who did drafting remember them ? ) you can get very fine
tips for them, the down side is that the ink will eventually wear off.
...

What link are you using, seems to work fine for me -

https://www.paulcbuff.com/

Those studio stands can be a godsend with height adjustability and steadiness, but they can be challenging
to keep due their height and weight. You may consider donating it to the university where...

In post #14 the three armed base with a center hole and bolt circle looks like
the base of a studio stand, did he give you the column and cross arm ?

That's quite a haul of Linhof stuff !

Drew,
You would need to remove the focusing knob part ( the part you're missing screws for ) that has the pinion gear that
mates with a small gear rack on the inner tube. It's that rack and pinion...

If you don't want to use heat all types of solder are soft, a wood chisel and some light tapping should shave most the solder off
use Dremels abrasive buffs ( EZ511HP ) they're essentially scotch...

The side to side tilt positioning is not precise since it's sliding surfaces, I've always had to bump it to get it to where I need it.
If it's very stiff the bearing surfaces of the tilt needs to be...

Drew, get yourself one of these - https://www.mcmaster.com/98728A114/
it'll make ID'ing the screw thread easier.

I had to double check mine to confirm, the shafts that the guide wheels are on
are off center drilled, so the become an eccentric shaft.
You can loosen the screws on either end of the shaft and...

Deleted post incorrect info

It was the shoes that got the gears turning they looked 'flapperish', and fashion styles come an go quickly
so i figured it would be a relatively quick search.
Never noticed the book, it's perfect...

Pity the plates you have don't have someone sitting reading a newspaper :)
I think you may have some luck by focusing in on certain items in the pictures you have with
Google's image search, I did...

John, funny you mentioned WM Berg, I happen to have an old catalog from them when they were in East Rockaway NY.
Don't think you can order from them anymore but have to go thru a distributor....