Prontor-S Stuck Open

Hydrangeas from the garden

A
Hydrangeas from the garden

  • 1
  • 1
  • 20
Field #6

D
Field #6

  • 4
  • 1
  • 49
Hosta

A
Hosta

  • 12
  • 7
  • 101
Water Orchids

A
Water Orchids

  • 5
  • 1
  • 59
Life Ring

A
Life Ring

  • 4
  • 2
  • 53

Recent Classifieds

Forum statistics

Threads
197,908
Messages
2,766,707
Members
99,500
Latest member
Neilmark
Recent bookmarks
0

DarkRoastArts

Member
Joined
Feb 13, 2022
Messages
9
Location
Minnesota
Format
Multi Format
Hello! New member here! I’m a film photography hobbyist located in the Twin Cities area of Minnesota, USA.

I was curious if you find folks could assist me in solving my Prontor-S issue. The shutter is off of a Billy-Record bellows camera and had had an issue with a sticking lens. So I dove in deep into taking it apart and cleaning it. Now, and I take the blame here for getting past my depth, I have an issue where the shutter will not close upon use of the release lever. I’ve gotten as far as believing this is an escapement issue but am baffle at the solution. I’ve got the Google doc in the manuals for this lens (which is how I found this lovely forum) but am struggling to comprehend it all. If I can figure out how to post a video clip, I’m happy to do so, to help illustrate the problem.

Thanks so much! Look forward to exploring this place more.
-DarkRoastArts
 
OP
OP
DarkRoastArts

DarkRoastArts

Member
Joined
Feb 13, 2022
Messages
9
Location
Minnesota
Format
Multi Format
It doesn’t reset. It stays completely open. I’m trying to upload a photo but it says the file is too big. I’m on an iPhone SE…
 

dxqcanada

Member
Joined
Jun 9, 2011
Messages
331
Location
Ontario, Canada
Format
Multi Format
So if you set the shutter speed cam to mid slow like 1/5s ... set shutter, then press release ... shutter opens ... you hear speed escapement engage, and end ... then shutter stays open ?
 

dxqcanada

Member
Joined
Jun 9, 2011
Messages
331
Location
Ontario, Canada
Format
Multi Format
dsc00822.jpg
 

shutterfinger

Member
Joined
Feb 25, 2013
Messages
5,020
Location
San Jose, Ca.
Format
4x5 Format
There are lots of things that can cause your failure.
1. delay timer not properly positioned, slots in the mount allow it to be moved in and out at the top and bottom if so equipped.
2. Speed ring not correctly installed blocking Bulb and Time levers from moving, Pallet end of delay timer not in its slot.
3. Springs not correctly installed on Bulb, Time, cocking.
https://drive.google.com/file/d/0B1...=sharing&resourcekey=0-URs_J982gWJSnJ-SD-rymA
When cocking and releasing the shutter as pictured it will stay open until the T lever is released.
 

albada

Subscriber
Joined
Apr 10, 2008
Messages
2,172
Location
Escondido, C
Format
35mm RF
In your video, it appears that the pallet at the bottom is sticky. When you pulled back the pallet near the beginning of the video, the shutter closed. The pallet is driven by a starwheel. You might try pulling the pallet's lever back a tiny amount, and see whether the escapement and pallet operate correctly, giving you the one-second speed. If so, the problem is either (1) pallet and/or starwheel are dirty, or (2) pallet lever is out of adjustment. (1) is by far the most common problem. Also, put the speed-setting dial back on, being sure that the various levers are in their slots, set the speed to the max or second-to-max, and see whether the shutter fires. If it does, then (1) or (2) is almost certainly the problem.

Mark Overton
 
Photrio.com contains affiliate links to products. We may receive a commission for purchases made through these links.
To read our full affiliate disclosure statement please click Here.

PHOTRIO PARTNERS EQUALLY FUNDING OUR COMMUNITY:



Ilford ADOX Freestyle Photographic Stearman Press Weldon Color Lab Blue Moon Camera & Machine
Top Bottom