Packard shutter speeds tested

[Tin Can]

I have been getting to know Packard shutters a bit and today I tested what I have with Shutter Speed App. https://itunes.apple.com/us/app/shut...560154244?mt=8

I used the same OE new bulb and rubber hose for all except #3 which has DIY RC servo control.

1. 2" Packard #6 1/6 to 1/60th second, depending on how hard and fast I squeezed the bulb. I am not consistent.

2. 3-1/4" Packard #5 1/2 second. About as fast as I can make a 'time' model run. Slower is easy once you learn the trick.

3. 3-1/2" #5 Packard electric modded to RC servo 1/2 second, consistently, and can loop, so it fires every 1/2 second. and it has adjustable flash sync. Ghost pics coming up.

4. 4-1/2" #6 Packard double pumper 1/10th second and slower, hard for my crappy hand to deliver.


For those that don't know about Packard shutters and types, such as #5 and #6. http://www.packardshutter.com/

I have learned they need to be used vertically and with the correct side up, which is not intuitive as my reasoning had me trying them upside down. Pulling the biggest one out of my Studio Ansco made me realize which way is up!

My conclusion is, the bigger they are, the slower they run and it's good to have the 'pin' model #6.

Mine are as old as the hills, new ones may perform faster, but these things have almost no friction points and seem to last forever.

Anybody have any tricks or advice?

I may try compressed air supply to see what I can get. Maybe broken shutters!

[Tin Can]

Well, I guess I'm learning and maybe getting my right hand stronger. My left can't even budge the shutter... I played with the 4-1/2'" today some more. It has rust under where the felt was , still de-rusting. Can't get it apart, the screws are rusted, I broke one non essential screw already. So I practiced with the shutter upright on a table.

Now I get reliable 1/15th second out of it. I gotta really concentrate on squeezing fast and hard. You strong people won't understand, but I couldn't shake hands with anyone for 2 years.

This is good!

[Jim C.]

Randy what kind of tubing are you using ? I've never used the OEM tubing, but my own experience with Packard is that
they do require a good squeeze on the bulb to actuate but the type of tubing makes a difference, latex tubing is nice and flexible
and works ok in short lengths but at long lengths the tubing itself swells when it meets any resistance.
And you loose the oomph needed to push the piston. This especially applies to studio shutters ( with all the added shutter leafs and associated linkages ).
Vinyl tubing like aquarium tubing seems to work best for long lengths since it resists pressure swelling.
I have not tried automotive vacuum tubing, but I would guess that it will work the same as vinyl tubing in terms of it's
wall thickness and stiffness.

There's a few posts here about 'tuning' the pneumatic cylinder, and the leafs, the pneumatic cylinder is brass and over
the years and previous owners they can get pretty mucked up with lube and verdigris, cleaning and polishing the piston
and bore helps a lot in regards to how hard you have to squeeze. Cleaning the shutter leafs too also helps, I've used alcohol
and naptha to clean them.

[Jim Noel]

Vacuum hose from an auto supply house works well with the one problem being it is not very flexible. AIr pressure will not cause it to swell so all the pressure goes to the shutter.

[Tin Can]

I using new hose and bulb bought from http://www.packardshutter.com/

Some of these are getting better as I exercise them.

And my right hand is getting stronger, don't forget I have bad hands.

Most have stated instantaneous speeds are 1/25th and I am close to those speeds on 2 shutters of that type.

[Harold_4074]

Some of these are getting better as I exercise them.

And don't be surprised if some of them behave "differently" after cleaning or "breaking in". I have a new-manufacture 3-1/2 inch that worked perfectly when I got it, but after thirty or forty cycles has become exquisitely sensitive to any back-suction when releasing the bulb for focusing. It's not a defect, really; it works just fine for the closed-open-closed cycle of picture taking, but I have to set it up sideways in order to conveniently focus.

[Jim Graves]

I have also heard the theory ... that the softer tubing cushions the compression and reduces transferred vibration.

Any ideas on that one?

[Tin Can]

Maybe that's why a double pumper is better.

I almost have my 4-1/2" double pumper apart, one critical screw is rusted in and I really don't want to break that screw and try to replace it, the damn thing is tiny, maybe #2. Trying tiny amounts of penetrating oil...

Are you the Harold with the SC11?

Some of these are getting better as I exercise them.

And don't be surprised if some of them behave "differently" after cleaning or "breaking in". I have a new-manufacture 3-1/2 inch that worked perfectly when I got it, but after thirty or forty cycles has become exquisitely sensitive to any back-suction when releasing the bulb for focusing. It's not a defect, really; it works just fine for the closed-open-closed cycle of picture taking, but I have to set it up sideways in order to conveniently focus.

[Tin Can]

That's sounds like a ? for Jim Galli!

I have also heard the theory ... that the softer tubing cushions the compression and reduces transferred vibration.

Any ideas on that one?

[Harold_4074]

Are you the Harold with the SC11?

Yep, that would be me.

The shorter lenses that I have will barely focus across the room due to bellows compression, so I don't often use the Packard shutter box. (It adds about 1-1/2 inches to the minimum lens-to-film distance.) Hence the dedicated Packard shutters.

With the camera inverted, the lensboard still has to go in right-side-up for the Packard to work properly; I sort of like the fact that the factory lensboards are beveled on the top edge to allow them to slide in from the "bottom" of the right-side-up camera. Kind of like the left-hand lug nuts on old Chryslers---appropriate in theory, but fortunately not really necessary in practice.

Incidentally, because spring tensions and weights are involved in Packard shutter operation, you may see speed differences if the shutters are driven uniformly but mounted in different orientations. Not something I would care about, but you might.