Troubleshooting - 2 out of 5 blank rolls from 645NII / 120mm

wleephoto645 · 12-11-2018, 02:34 PM

I recently sent 5 rolls of 120 in for processing and the lab reported back that 2 of the 5 rolls were blank. As far as I know all 5 rolls were shot on the same camera (645NII). The 2 blank rolls had no metadata recorded on the film edge but factory data was visible, however, the lab is saying there could have been a sticky shutter or film advance issue. I'm wondering, if the shutter was stuck, wouldn't there still be electronic metadata recorded on the frame edge?

Film was loaded correctly and removed from the take up school with "exposed" tags showing, so I am eliminating any advancement issues. Has anyone else experienced this? Any other troubleshooting variables I should consider?

Thanks!

**johnha** · 12-11-2018, 03:05 PM - **1 Like**

Sounds unlikely to be a shutter issue, assuming it didn't advance the whole film in one go (loading or unloading - you'd have noticed). I can only think the film was loaded 'inside-out' (backing paper in front of film). I don't have a P645 so I don't know if this is possible (it definitely hasn't happened to me with my Mamiya 645!).

wleephoto645 · 12-11-2018, 03:47 PM

Originally posted by johnha

Sounds unlikely to be a shutter issue, assuming it didn't advance the whole film in one go (loading or unloading - you'd have noticed). I can only think the film was loaded 'inside-out' (backing paper in front of film). I don't have a P645 so I don't know if this is possible (it definitely hasn't happened to me with my Mamiya 645!).

I don't believe it is a shutter issue either. 3 of the 5 rolls were exposed perfectly across all frames, plus the metadata imprinting is missing. I can't imagine carelessly loading film backwards... at least not with this camera.

abruzzi · 12-11-2018, 08:51 PM - **1 Like**

If the film was loaded backwards with the paper in front of the film, the spools would turn in the opposite direction, so I doubt it would pretend to work.

wleephoto645 · 12-12-2018, 10:00 AM

Originally posted by abruzzi

If the film was loaded backwards with the paper in front of the film, the spools would turn in the opposite direction, so I doubt it would pretend to work.

Good point. thanks.

**kaseki** · 12-12-2018, 10:05 AM - **1 Like**

Originally posted by abruzzi

If the film was loaded backwards with the paper in front of the film, the spools would turn in the opposite direction, so I doubt it would pretend to work.

I was wondering about that, but my cassettes have film in them so I'm a bit under-enthused about testing them. However, if the take-up spool is wound in the normal way with the film backing side out, it would behave the same. The feed spool is, I think, controlled by drag and not a pawl, so it might operate normally even though the film is passing over the roll instead of sharply up and over the platen from under the roll. I accidentally started to do this once and it was obvious that something seemed wrong.

For this setup to be realized, not only would the user have to install the film backwards while not noticing (maybe in a film changing bag), but the removed take-up roll would look different and he as well as the developing lab would have to not notice. Further, how would the initial winding to the arrow be possible if it was underneath the visible surface?

wleephoto645 · 12-12-2018, 10:44 AM

Originally posted by kaseki

I was wondering about that, but my cassettes have film in them so I'm a bit under-enthused about testing them. However, if the take-up spool is wound in the normal way with the film backing side out, it would behave the same. The feed spool is, I think, controlled by drag and not a pawl, so it might operate normally even though the film is passing over the roll instead of sharply up and over the platen from under the roll. I accidentally started to do this once and it was obvious that something seemed wrong.

For this setup to be realized, not only would the user have to install the film backwards while not noticing (maybe in a film changing bag), but the removed take-up roll would look different and he as well as the developing lab would have to not notice. Further, how would the initial winding to the arrow be possible if it was underneath the visible surface?

All great and valid points, which is why I'm confident that the rolls were loaded correctly to begin with. To test the theory I just tried to load a roll backwards and the insert does not allow it as the mechanism only advances in one direction.

Safe to say we can eliminate a backwards load from the equation.

asahijock · 12-12-2018, 05:32 PM - **1 Like**

Were the 2 out of the 5 that were blank loaded in sequence? This might help to establish if the problem is intermittent or started on roll 4 and continued on 5 and is potentially still there. If the screen showed that each frame moved in front of the shutter and you could hear the movement and the roll ended up fully on the top spool but there is nothing on any of the frames, it suggests that no light was getting to the film. With a 645 SLR this cannot be as simple as leaving the lens cap on as this shows in the viewfinder. So unless there are other ways that light is blocked which I cannot think of, then the shutter must be stuck shut. If the shutter is not working at all on a whole two rolls then this does suggests the rolls will be sequential. An intermittent sticky shutter which completely closes the shutter for two rolls then works perfectly on the other three sounds unlikely.

On this basis the rolls have to be either 4 and 5 or 1 and 2. If it is 1 and 2 then the shutter problem might have disappeared. If it is 4 and 5 then it might disappear if you use roll 6 but I'd be sceptical.

I have a N and not an NII but I assume that it is possible to check the shutter opening without film.

asahijock

**Bonner04** · 12-12-2018, 06:54 PM

Labs make mistakes too!

**rdenney** · 12-12-2018, 07:51 PM - **1 Like**

Have you dry-fired the shutter without a lens to make sure the mirror is going up in addition to the shutter opening?

Rick “covering the obvious bases” Denney

wleephoto645 · 12-13-2018, 10:30 AM

Originally posted by Bonner04

Labs make mistakes too!

But do they ever admit it?? Ha!

---------- Post added 12-13-18 at 12:07 PM ----------

Originally posted by asahijock

Were the 2 out of the 5 that were blank loaded in sequence? This might help to establish if the problem is intermittent or started on roll 4 and continued on 5 and is potentially still there. If the screen showed that each frame moved in front of the shutter and you could hear the movement and the roll ended up fully on the top spool but there is nothing on any of the frames, it suggests that no light was getting to the film. With a 645 SLR this cannot be as simple as leaving the lens cap on as this shows in the viewfinder. So unless there are other ways that light is blocked which I cannot think of, then the shutter must be stuck shut. If the shutter is not working at all on a whole two rolls then this does suggests the rolls will be sequential. An intermittent sticky shutter which completely closes the shutter for two rolls then works perfectly on the other three sounds unlikely.

On this basis the rolls have to be either 4 and 5 or 1 and 2. If it is 1 and 2 then the shutter problem might have disappeared. If it is 4 and 5 then it might disappear if you use roll 6 but I'd be sceptical.

I have a N and not an NII but I assume that it is possible to check the shutter opening without film.

asahijock

I fired the shutter without a film insert at several different speeds and it was firing just fine, every time. I'm not sure about the sequence of the rolls. I have another roll in it now which I will be sure to have noted when I send off for processing. That being said, I did not fire the shutter without a lens to see if the mirror was flipping, but I will do that as soon as this roll is finished.

abruzzi · 12-14-2018, 04:47 PM - **1 Like**

Originally posted by wleephoto645

I fired the shutter without a film insert at several different speeds and it was firing just fine, every time. I'm not sure about the sequence of the rolls. I have another roll in it now which I will be sure to have noted when I send off for processing. That being said, I did not fire the shutter without a lens to see if the mirror was flipping, but I will do that as soon as this roll is finished.

Even if you lab develop your stuff, it useful to have some cheap B&W film (Fomapan/Arista 100/200/400 is one of the cheaper) and some rodinal and fixer for testing purposes (rodinal is cheap, requires very little to develop a roll, and doesn't go bad for along time. I don't know if fixer dies from age, but I've been told it doesn't oxidize like most developers do.) It can pay for itself when you're chasing down a problem. nonetheless, I hope your problem doesn't recur.

wleephoto645 · 12-15-2018, 06:15 PM

Originally posted by abruzzi

Even if you lab develop your stuff, it useful to have some cheap B&W film (Fomapan/Arista 100/200/400 is one of the cheaper) and some rodinal and fixer for testing purposes (rodinal is cheap, requires very little to develop a roll, and doesn't go bad for along time. I don't know if fixer dies from age, but I've been told it doesn't oxidize like most developers do.) It can pay for itself when you're chasing down a problem. nonetheless, I hope your problem doesn't recur.

Sound advice. Thank you.

12-11-2018, 02:34 PM	#1
wleephoto645 New Member Join Date: Sep 2018 Posts: 8	Troubleshooting - 2 out of 5 blank rolls from 645NII / 120mm I recently sent 5 rolls of 120 in for processing and the lab reported back that 2 of the 5 rolls were blank. As far as I know all 5 rolls were shot on the same camera (645NII). The 2 blank rolls had no metadata recorded on the film edge but factory data was visible, however, the lab is saying there could have been a sticky shutter or film advance issue. I'm wondering, if the shutter was stuck, wouldn't there still be electronic metadata recorded on the frame edge? Film was loaded correctly and removed from the take up school with "exposed" tags showing, so I am eliminating any advancement issues. Has anyone else experienced this? Any other troubleshooting variables I should consider? Thanks!

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Sigma 70-200 f2.8 EX APO (non-hsm) - troubleshooting and/or worth the repair?	Flipside	Troubleshooting and Beginner Help	5	07-28-2018 03:54 AM
Bulk loader - first experience and troubleshooting.	pathdoc	Film Processing, Scanning, and Darkroom	9	09-08-2017 01:59 PM
Troubleshooting ideas for Super Program?	lithedreamer	Pentax Film SLR Discussion	13	12-22-2016 10:32 AM
Pentax ME Super - Blank Rolls?	kfreud	Troubleshooting and Beginner Help	9	10-30-2015 12:22 PM
Pentax 645 120mm macro lens will mount on 645N but not on 645NII	aerou	Troubleshooting and Beginner Help	2	12-15-2014 05:47 PM

12-11-2018, 03:05 PM - 1 Like	#2
johnha Site Supporter Join Date: Apr 2012 Location: Lancashire, UK Photos: Albums Posts: 883	Sounds unlikely to be a shutter issue, assuming it didn't advance the whole film in one go (loading or unloading - you'd have noticed). I can only think the film was loaded 'inside-out' (backing paper in front of film). I don't have a P645 so I don't know if this is possible (it definitely hasn't happened to me with my Mamiya 645!).

12-11-2018, 03:47 PM	#3
wleephoto645 New Member Join Date: Sep 2018 Posts: 8 Original Poster	Originally posted by johnha Sounds unlikely to be a shutter issue, assuming it didn't advance the whole film in one go (loading or unloading - you'd have noticed). I can only think the film was loaded 'inside-out' (backing paper in front of film). I don't have a P645 so I don't know if this is possible (it definitely hasn't happened to me with my Mamiya 645!). I don't believe it is a shutter issue either. 3 of the 5 rolls were exposed perfectly across all frames, plus the metadata imprinting is missing. I can't imagine carelessly loading film backwards... at least not with this camera.

12-11-2018, 08:51 PM - 1 Like	#4
abruzzi Pentaxian Join Date: Apr 2017 Location: New Mexico Posts: 746	If the film was loaded backwards with the paper in front of the film, the spools would turn in the opposite direction, so I doubt it would pretend to work.

12-12-2018, 10:00 AM	#5
wleephoto645 New Member Join Date: Sep 2018 Posts: 8 Original Poster	Originally posted by abruzzi If the film was loaded backwards with the paper in front of the film, the spools would turn in the opposite direction, so I doubt it would pretend to work. Good point. thanks.

12-12-2018, 10:05 AM - 1 Like	#6
kaseki Loyal Site Supporter Join Date: Dec 2017 Photos: Gallery \| Albums Posts: 647	Originally posted by abruzzi If the film was loaded backwards with the paper in front of the film, the spools would turn in the opposite direction, so I doubt it would pretend to work. I was wondering about that, but my cassettes have film in them so I'm a bit under-enthused about testing them. However, if the take-up spool is wound in the normal way with the film backing side out, it would behave the same. The feed spool is, I think, controlled by drag and not a pawl, so it might operate normally even though the film is passing over the roll instead of sharply up and over the platen from under the roll. I accidentally started to do this once and it was obvious that something seemed wrong. For this setup to be realized, not only would the user have to install the film backwards while not noticing (maybe in a film changing bag), but the removed take-up roll would look different and he as well as the developing lab would have to not notice. Further, how would the initial winding to the arrow be possible if it was underneath the visible surface?

12-12-2018, 10:44 AM	#7
wleephoto645 New Member Join Date: Sep 2018 Posts: 8 Original Poster	Originally posted by kaseki I was wondering about that, but my cassettes have film in them so I'm a bit under-enthused about testing them. However, if the take-up spool is wound in the normal way with the film backing side out, it would behave the same. The feed spool is, I think, controlled by drag and not a pawl, so it might operate normally even though the film is passing over the roll instead of sharply up and over the platen from under the roll. I accidentally started to do this once and it was obvious that something seemed wrong. For this setup to be realized, not only would the user have to install the film backwards while not noticing (maybe in a film changing bag), but the removed take-up roll would look different and he as well as the developing lab would have to not notice. Further, how would the initial winding to the arrow be possible if it was underneath the visible surface? All great and valid points, which is why I'm confident that the rolls were loaded correctly to begin with. To test the theory I just tried to load a roll backwards and the insert does not allow it as the mechanism only advances in one direction. Safe to say we can eliminate a backwards load from the equation.

12-12-2018, 05:32 PM - 1 Like	#8
asahijock Senior Member Join Date: Mar 2011 Location: Northants, England Posts: 148	Were the 2 out of the 5 that were blank loaded in sequence? This might help to establish if the problem is intermittent or started on roll 4 and continued on 5 and is potentially still there. If the screen showed that each frame moved in front of the shutter and you could hear the movement and the roll ended up fully on the top spool but there is nothing on any of the frames, it suggests that no light was getting to the film. With a 645 SLR this cannot be as simple as leaving the lens cap on as this shows in the viewfinder. So unless there are other ways that light is blocked which I cannot think of, then the shutter must be stuck shut. If the shutter is not working at all on a whole two rolls then this does suggests the rolls will be sequential. An intermittent sticky shutter which completely closes the shutter for two rolls then works perfectly on the other three sounds unlikely. On this basis the rolls have to be either 4 and 5 or 1 and 2. If it is 1 and 2 then the shutter problem might have disappeared. If it is 4 and 5 then it might disappear if you use roll 6 but I'd be sceptical. I have a N and not an NII but I assume that it is possible to check the shutter opening without film. asahijock

12-12-2018, 06:54 PM	#9
Bonner04 Site Supporter Join Date: Jan 2016 Location: Ventura, CA Photos: Gallery Posts: 337	Labs make mistakes too!

12-12-2018, 07:51 PM - 1 Like	#10
rdenney Site Supporter Join Date: Feb 2018 Location: NoVA Posts: 458	Have you dry-fired the shutter without a lens to make sure the mirror is going up in addition to the shutter opening? Rick “covering the obvious bases” Denney

12-13-2018, 10:30 AM	#11
wleephoto645 New Member Join Date: Sep 2018 Posts: 8 Original Poster	Originally posted by Bonner04 Labs make mistakes too! But do they ever admit it?? Ha! ---------- Post added 12-13-18 at 12:07 PM ---------- Originally posted by asahijock Were the 2 out of the 5 that were blank loaded in sequence? This might help to establish if the problem is intermittent or started on roll 4 and continued on 5 and is potentially still there. If the screen showed that each frame moved in front of the shutter and you could hear the movement and the roll ended up fully on the top spool but there is nothing on any of the frames, it suggests that no light was getting to the film. With a 645 SLR this cannot be as simple as leaving the lens cap on as this shows in the viewfinder. So unless there are other ways that light is blocked which I cannot think of, then the shutter must be stuck shut. If the shutter is not working at all on a whole two rolls then this does suggests the rolls will be sequential. An intermittent sticky shutter which completely closes the shutter for two rolls then works perfectly on the other three sounds unlikely. On this basis the rolls have to be either 4 and 5 or 1 and 2. If it is 1 and 2 then the shutter problem might have disappeared. If it is 4 and 5 then it might disappear if you use roll 6 but I'd be sceptical. I have a N and not an NII but I assume that it is possible to check the shutter opening without film. asahijock I fired the shutter without a film insert at several different speeds and it was firing just fine, every time. I'm not sure about the sequence of the rolls. I have another roll in it now which I will be sure to have noted when I send off for processing. That being said, I did not fire the shutter without a lens to see if the mirror was flipping, but I will do that as soon as this roll is finished.

Thread Tools	Search this Thread
	Search this Thread: Advanced Search

12-14-2018, 04:47 PM - 1 Like	#12
abruzzi Pentaxian Join Date: Apr 2017 Location: New Mexico Posts: 746	Originally posted by wleephoto645 I fired the shutter without a film insert at several different speeds and it was firing just fine, every time. I'm not sure about the sequence of the rolls. I have another roll in it now which I will be sure to have noted when I send off for processing. That being said, I did not fire the shutter without a lens to see if the mirror was flipping, but I will do that as soon as this roll is finished. Even if you lab develop your stuff, it useful to have some cheap B&W film (Fomapan/Arista 100/200/400 is one of the cheaper) and some rodinal and fixer for testing purposes (rodinal is cheap, requires very little to develop a roll, and doesn't go bad for along time. I don't know if fixer dies from age, but I've been told it doesn't oxidize like most developers do.) It can pay for itself when you're chasing down a problem. nonetheless, I hope your problem doesn't recur.

12-15-2018, 06:15 PM	#13
wleephoto645 New Member Join Date: Sep 2018 Posts: 8 Original Poster	Originally posted by abruzzi Even if you lab develop your stuff, it useful to have some cheap B&W film (Fomapan/Arista 100/200/400 is one of the cheaper) and some rodinal and fixer for testing purposes (rodinal is cheap, requires very little to develop a roll, and doesn't go bad for along time. I don't know if fixer dies from age, but I've been told it doesn't oxidize like most developers do.) It can pay for itself when you're chasing down a problem. nonetheless, I hope your problem doesn't recur. Sound advice. Thank you.