Problem with M645Pro today

Rolleijoe · Nov 6, 2015

I went out this morning to shoot up the roll in the camera, but it would never fire. All I did was change from the 150mm to 80mm. Last time I used it was a couple of weeks ago, with no problems. Check battery light said it was ok, (also from a couple of weeks ago). Had to leave without a shot captured.

Anybody have a clue what could be going on? I'll be needing to use it again on the 14th.

Thanks,
Joe

MatthewDunn · Nov 6, 2015

Was the lens cocked when you changed lens? I don't know about your system, but on some systems, that would create that kind of problem.

rbultman · Nov 6, 2015

MatthewDunn said:
Was the lens cocked when you changed lens? I don't know about your system, but on some systems, that would create that kind of problem.

The shutter is in the body in the 645Pro, not in the lens like in the RB67.

Regards,
Rob

rbultman · Nov 6, 2015

Are you using a metering prism in one of the auto modes? Try setting the shutter speed manually. That should rule out issues with the metering prism.

Did you remember to remove the dark slide?

Check the contacts between the back and body and the metering prism and the body.

Did you try putting the 80mm back on? Make sure the aperture index pin is engage into the little indexing table on the aperture ring.

Regards,
Rob

MattKing · Nov 6, 2015

Try cleaning the battery terminals and, if necessary, replacing the battery. On a couple of occasions I've had the battery check light give a "false positive".

Rolleijoe · Nov 7, 2015

rbultman said:
Are you using a metering prism in one of the auto modes? Try setting the shutter speed manually. That should rule out issues with the metering prism.

Did you remember to remove the dark slide?

Check the contacts between the back and body and the metering prism and the body.

Did you try putting the 80mm back on? Make sure the aperture index pin is engage into the little indexing table on the aperture ring.

Regards,
Rob

Yes, I'm using a metering prism. I could see thru it to focus ok. Tried setting a manual shutter speed, but that didn't seem to make any difference.

Yes the the dark slide was still removed from a couple of weeks ago.

Tried the 80mm, the 45mm, and the 150mm. Nothing changed.

Rolleijoe · Nov 7, 2015

MattKing said:
Try cleaning the battery terminals and, if necessary, replacing the battery. On a couple of occasions I've had the battery check light give a "false positive".

I hadn't thought of that. Will try fresh batteries tomorrow. Unfortunately I lost the opportunity to shoot an historic landmark today. Thanks for the tip.

Rolleijoe · Nov 7, 2015

MatthewDunn said:
Was the lens cocked when you changed lens? I don't know about your system, but on some systems, that would create that kind of problem.

Thanks Matthew, but as Bob pointed out, there's no shutter on the 645Pro lenses.

Rolleijoe · Nov 8, 2015

Update

I tried the camera yesterday, took it out of the bag and saw I had left it switched on. So was worried about the batteries, but to my amazement it worked perfectly! Now I'm confused. Need to finish out the roll in it, so will try taking some pics downtown.

has this ever happened to anybody else with your Mamiya?

MattKing · Nov 8, 2015

Leaving the camera switched on won't exhaust the battery, unless the shutter release is also pressed. If unused, the circuit turns itself off after a pre-determined and relatively short time.

Did you physically check the battery? Sometimes just moving it slightly will resolve a contact problem.

mweintraub · Nov 9, 2015

MattKing said:
Leaving the camera switched on won't exhaust the battery, unless the shutter release is also pressed. If unused, the circuit turns itself off after a pre-determined and relatively short time.

Did you physically check the battery? Sometimes just moving it slightly will resolve a contact problem.

Leaving the winder on won't drain it, but it could make it the batteries leak. That's what happened to me.

Sirius Glass · Nov 9, 2015

This last May in Paris I had the Hasselblad PME prism show that the battery was good and the light meter lit up but did not work correctly. I bought batteries and it lit up differently but still did not work. I took a taxi across Paris to a camera store and bought a new Sekonic L-308S for the rest of the trip. When I got home I took it to Samys Camera to be repaired. It turns out that the batteries that I bought were bad and all I needed was fresh batteries. So what happened to you could have cost you a whole lot more.

mweintraub · Nov 9, 2015

Sirius Glass said:
This last May in Paris I had the Hasselblad PME prism show that the battery was good and the light meter lit up but did not work correctly. I bought batteries and it lit up differently but still did not work. I took a taxi across Paris to a camera store and bought a new Sekonic L-308S for the rest of the trip. When I got home I took it to Samys Camera to be repaired. It turns out that the batteries that I bought were bad and all I needed was fresh batteries. So what happened to you could have cost you a whole lot more.

Agreed. I do not buy cheap batteries anymore. They usually don't have enough juice to power devices that require a full charge.

Sirius Glass · Nov 9, 2015

mweintraub said:
Agreed. I do not buy cheap batteries anymore. They usually don't have enough juice to power devices that require a full charge.

The batteries were not cheap and they were sold as new. They were just bad.

MattKing · Nov 9, 2015

For clarity, I was referring to the 6 volt battery in the camera. While I have a power winder, it sits in my accessory storage bag, because I usually prefer the hand crank.

I get way better results with the silver oxide versions of the battery.

mweintraub · Nov 9, 2015

Sirius Glass said:
The batteries were not cheap and they were sold as new. They were just bad.

Oh, that sucks.

mweintraub · Nov 9, 2015

MattKing said:
For clarity, I was referring to the 6 volt battery in the camera. While I have a power winder, it sits in my accessory storage bag, because I usually prefer the hand crank.

I get way better results with the silver oxide versions of the battery.

Then were is the on/off switch on the body?

MattKing · Nov 9, 2015

mweintraub said:
Then were is the on/off switch on the body?

It is concentric to the shutter release - on, off or self timer are the positions.

mweintraub · Nov 9, 2015

MattKing said:
It is concentric to the shutter release - on, off or self timer are the positions.

From what I understand, it's a lock, not an "off" switch. But essentually it's an off switch because it won't allow anything to press the switch to activate it.

rbultman · Nov 9, 2015

I just checked the manual. I always assumed it was a lower switch, but it is not. It is, as you say, a release lock.

Sent from my Nexus 5 using Tapatalk

Rolleijoe · Nov 10, 2015

It fixed itself?

My batteries are new Interstate brand, which are not cheap, and last a very long time. For some reason, it just decided to fix itself. Will report back if this happens again on the 14th.

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