Overexposed Left Edge on the My MX

**jumbleview** · 08-05-2018, 11:37 AM

I recently returned to shoot film. I bought MX in good shape and serviced it by Eric last year. Most of photos have overexposed light strip at left edge. As example, see negative and converted image attached (scanned by Pentax K-01). Not a deal breaker as anyway I usually crop a lot, but I would like to know if fix is possible.

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Eyewanders · 08-05-2018, 11:44 AM

Originally posted by jumbleview

I recently returned to shoot film. I bought MX in good shape and serviced it by Eric last year. Most of photos have overexposed light strip at left edge. As example, see negative and converted image attached (scanned by Pentax K-01). Not a deal breaker as anyway I usually crop a lot, but I would like to know if fix is possible.

How many frames can you see this in? All of them? Is the over-exposed strip always in the exact same spot, or does it vary in width at all. And finally, were the shots that show this issue taken with the same shutter speed or near? I ask because it looks like a shutter-capping issue, wherein (often) the trailing curtain isn't closing quite fast enough which results in one vertical section being incorrectly exposed. If it was serviced by Eric I'd send a message with examples and ask his opinion.

disconnekt · 08-05-2018, 11:46 AM

I was going to say you may need a CLA for it, but seeing that you sent it to Eric already for service made me think that it may be a developing issue.

**jumbleview** · 08-05-2018, 11:51 AM

I see such a strip on most of frames. Yes, it was serviced by Eric last fall. I'll probably contact him. If fix is expensive I will live with current state.

Swift1 · 08-05-2018, 12:03 PM - **3 Likes**

That looks like the trailing curtain is bouncing.

Eyewanders · 08-05-2018, 12:03 PM

Originally posted by jumbleview

I see such a strip on most of frames. Yes, it was serviced by Eric last fall. I'll probably contact him. If fix is expensive I will live with current state.

Again, same shutter speeds? Same location and width each time? Are there frames that do *not* exhibit it and if so can you recall their exposure settings. A couple more examples would help... But yeah, give Eric a shout.

**jumbleview** · 08-05-2018, 12:55 PM

Originally posted by chickentender

Again, same shutter speeds? Same location and width each time? Are there frames that do *not* exhibit it and if so can you recall their exposure settings. A couple more examples would help... But yeah, give Eric a shout.

I shoot roll within single hour in Mission district San Francisco. And all frames have such a strip. Unfortunately I did not get a habit yet to write down shutter and exposure (lens was A-35 mm 2.8). As far as I remember most frames were 1/60 or 1/125.

I removed attachments as they are not relevant anymore

Last edited by jumbleview; 08-12-2018 at 09:33 PM. Reason: Attachment removed

**ChrisPlatt** · 08-06-2018, 05:27 AM

Why not contact Eric and send him the images of the scanned negatives?

Chris

Ranchu · 08-06-2018, 11:32 AM - **1 Like**

Can't imagine he'd charge you to correct this, aside from shipping.

**jumbleview** · 08-07-2018, 08:16 AM

Thanks everybody for suggestion. From what I searched on-line that cannot be light seal leak (leak overexposure does not have sharp boundary). So indeed probably something with curtain mechanic. I contacted Eric. He needs camera for evaluation and I'll send it late this week. I'll post about the resolution.

**jumbleview** · 08-12-2018, 09:37 PM

I misled folks on the forum ( and even Eric). I decided to investigate more before sending camera to Eric and found this dark strip has nothing to do with film camera. It is problem with the way how I scan film. Film is in the holder and looks like holder frame separator affects shot. See attachments: first scan is a regular mine (I just try to fit frame on the sensor of K-01). Second is test where edge is in the middle part of K-01 sensor. The difference clearly visible. Has to find out how to change my scanning setup.

timw4mail · 08-13-2018, 06:41 AM

Originally posted by jumbleview

I misled folks on the forum ( and even Eric). I decided to investigate more before sending camera to Eric and found this dark strip has nothing to do with film camera. It is problem with the way how I scan film. Film is in the holder and looks like holder frame separator affects shot. See attachments: first scan is a regular mine (I just try to fit frame on the sensor of K-01). Second is test where edge is in the middle part of K-01 sensor. The difference clearly visible. Has to find out how to change my scanning setup.

Scanning is its own skill

Are you using a camera to scan?

**jumbleview** · 08-13-2018, 09:41 AM

Originally posted by timw4mail

Scanning is its own skill

Are you using a camera to scan?

Yes, I put film strip (inside plastic holder) on top of light table. Then I make macro photo of each frame with pentax K-01 and 35 Limited macro lens.

**ChrisPlatt** · 08-13-2018, 04:32 PM

View the negatives on a light table without the holder.
If the defect is no longer evident then you have your answer.

Chris

08-05-2018, 12:55 PM	#7
jumbleview Site Supporter Join Date: May 2012 Location: Concord, CA Posts: 1,068 Original Poster	Two more examples... Originally posted by chickentender Again, same shutter speeds? Same location and width each time? Are there frames that do not exhibit it and if so can you recall their exposure settings. A couple more examples would help... But yeah, give Eric a shout. I shoot roll within single hour in Mission district San Francisco. And all frames have such a strip. Unfortunately I did not get a habit yet to write down shutter and exposure (lens was A-35 mm 2.8). As far as I remember most frames were 1/60 or 1/125. I removed attachments as they are not relevant anymore Last edited by jumbleview; 08-12-2018 at 09:33 PM. Reason: Attachment removed

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08-05-2018, 11:44 AM	#2
Eyewanders Veteran Member Join Date: Jan 2008 Location: Land of the Salish Sea Photos: Gallery \| Albums Posts: 3,343	Originally posted by jumbleview I recently returned to shoot film. I bought MX in good shape and serviced it by Eric last year. Most of photos have overexposed light strip at left edge. As example, see negative and converted image attached (scanned by Pentax K-01). Not a deal breaker as anyway I usually crop a lot, but I would like to know if fix is possible. How many frames can you see this in? All of them? Is the over-exposed strip always in the exact same spot, or does it vary in width at all. And finally, were the shots that show this issue taken with the same shutter speed or near? I ask because it looks like a shutter-capping issue, wherein (often) the trailing curtain isn't closing quite fast enough which results in one vertical section being incorrectly exposed. If it was serviced by Eric I'd send a message with examples and ask his opinion.

08-05-2018, 11:46 AM	#3
disconnekt Pentaxian Join Date: Oct 2011 Location: SoCal/I.E. Photos: Albums Posts: 1,699	I was going to say you may need a CLA for it, but seeing that you sent it to Eric already for service made me think that it may be a developing issue.

08-05-2018, 11:51 AM	#4
jumbleview Site Supporter Join Date: May 2012 Location: Concord, CA Posts: 1,068 Original Poster	I see such a strip on most of frames. Yes, it was serviced by Eric last fall. I'll probably contact him. If fix is expensive I will live with current state.

08-05-2018, 12:03 PM - 3 Likes	#5
Swift1 Veteran Member Join Date: Sep 2009 Location: Oregon Photos: Gallery \| Albums Posts: 5,079	That looks like the trailing curtain is bouncing.

08-05-2018, 12:03 PM	#6
Eyewanders Veteran Member Join Date: Jan 2008 Location: Land of the Salish Sea Photos: Gallery \| Albums Posts: 3,343	Originally posted by jumbleview I see such a strip on most of frames. Yes, it was serviced by Eric last fall. I'll probably contact him. If fix is expensive I will live with current state. Again, same shutter speeds? Same location and width each time? Are there frames that do not exhibit it and if so can you recall their exposure settings. A couple more examples would help... But yeah, give Eric a shout.

08-06-2018, 05:27 AM	#8
ChrisPlatt Site Supporter Join Date: Nov 2007 Location: Rockaway Beach NYC Posts: 7,692	Why not contact Eric and send him the images of the scanned negatives? Chris

08-06-2018, 11:32 AM - 1 Like	#9
Ranchu Senior Member Join Date: Jan 2014 Posts: 151	Can't imagine he'd charge you to correct this, aside from shipping.

08-07-2018, 08:16 AM	#10
jumbleview Site Supporter Join Date: May 2012 Location: Concord, CA Posts: 1,068 Original Poster	Thanks everybody for suggestion. From what I searched on-line that cannot be light seal leak (leak overexposure does not have sharp boundary). So indeed probably something with curtain mechanic. I contacted Eric. He needs camera for evaluation and I'll send it late this week. I'll post about the resolution.

08-13-2018, 06:41 AM	#12
timw4mail Pentaxian Join Date: Apr 2017 Location: Driving a Mirage Photos: Gallery \| Albums Posts: 1,670	Originally posted by jumbleview I misled folks on the forum ( and even Eric). I decided to investigate more before sending camera to Eric and found this dark strip has nothing to do with film camera. It is problem with the way how I scan film. Film is in the holder and looks like holder frame separator affects shot. See attachments: first scan is a regular mine (I just try to fit frame on the sensor of K-01). Second is test where edge is in the middle part of K-01 sensor. The difference clearly visible. Has to find out how to change my scanning setup. Scanning is its own skill Are you using a camera to scan?

08-13-2018, 09:41 AM	#13
jumbleview Site Supporter Join Date: May 2012 Location: Concord, CA Posts: 1,068 Original Poster	Originally posted by timw4mail Scanning is its own skill Are you using a camera to scan? Yes, I put film strip (inside plastic holder) on top of light table. Then I make macro photo of each frame with pentax K-01 and 35 Limited macro lens.

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08-13-2018, 04:32 PM	#14
ChrisPlatt Site Supporter Join Date: Nov 2007 Location: Rockaway Beach NYC Posts: 7,692	View the negatives on a light table without the holder. If the defect is no longer evident then you have your answer. Chris