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Nikon MB-1 Battery Meter

How do I get to the battery meter for repair. Power out is fine. Just the meter is not working.

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Posted on Jan 02, 2017

  • 206 Answers

SOURCE: Canon Ae-1

Shutter release magnet faulty ( your camera is cocked but since you cannot release the shutter you cannot wind the film ). Remedy : open bottom cover by removing the two screws. You will see two small electro magnets one on the left hand side and the shutter release one on the right hand side ( it is the bigger one of the two ). The very thin wires from the magnet to the small circuit board on the right hand side may be broken : inspect and resolder 10 joints you see on the p.c. board. If no joy replace the s.r.magnet.

Posted on Sep 16, 2007

SOURCE: nikon fg light meter

Try new batteries. If that doesn't help, the body likely has an internal failure in the electronics. It will almost certainly be less expensive to replace it than to have this type of problem repaired.

Posted on Nov 02, 2007

  • 3006 Answers

SOURCE: Nikon FG Shutter and light meter not working

Sorry, but there is nothing else you can do without dismantling the camera and giving it a full service. It's not a DIY job so will have to go to a repair specialist.

Note that unlike some similar Nikon models of the time, the FG's complex electronics mean that your camera may now only be good for spare parts as it's likely that the main circuit board has failed and replacements simply are not available and arevery difficult and expensive to fit if you're lucky enough to locate one. The reputation for failure of this model due to ageing circuitry means that it's now unpopular and near worthless.

A repair specialist can certainly tell you whether the camera is repairable before undertaking any serious work on it.

Personally, I'd just advise you to sell it as is for spares or repairs and to obtain a working example or even the mechanical Nikon FM/FM2 which are still plentiful, easily serviced and repaired, and available fairly cheaply or even free (via FreeCycle).

Posted on Apr 08, 2010

Testimonial: "Thanks Obertelli for taking the time for the detailed answer. I am hoping to keep the 50mm lens and hopefully use it with adapter."

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SOURCE: I recently had my Canon FTb(n) 35mm camera fully

You have a few options:-

1. If you shoot negatives, then just use the cheapest unstable voltage lithium equivalent (LR9/V625U). Negative film and the printing process has a wide exposure latitude and so most users won't notice any fault.

2. Use the silver oxide equivalent (S625PX) which has a stable output voltage of 1.55v which is higher than the 1.35v original. Again you can either rely on exposure latitude, or if you shoot transparencies you have the additional option of compensating by up to one or two stops as necessary by adjusting the film speed dial. As the output voltage is constant, so is the compensation for the life of the battery. Or you can get a camera technician to recalibrate the meter to suit the higher voltage. Compensating has a downside though and it's that you're effectively shifting the EV scale so you may lose some of the exposure range which your meter can cope with.

3. Use a Weincell MR625 Zinc/Air battery. This has the correct voltage but they don't last as long and cost more than the other batteries listed so far.

4. Use a CrisCam MR9 adaptor. This is a one off purchase of a voltage reducing adaptor which houses a silver oxide cell. You can move it from camera to camera, and as the voltage has been reduced rather than compensated for you retain the full EV range of your meter. If you live in North America it's cheaper to buy directly from the US manufacturer, but they charge really silly money for shipping overseas.

5. Although I have an MR9 adaptor, I've switched to using an excellent and technically superior alternative which is custom made to order by Frans De Gruitjer in the Netherlands. It's about half the price of the MR9 adaptor, has superior output characteristics which mean it's also suited to cameras with a high current drain. Or you can make your own, from scratch, using very comprehensive instructions he provides or make one using a kit he provides. If you buy them ready-built, then postage is included if ordering within Europe and they have a five year warranty. For current details on prices and availability, contact Frans at . There's no language barrier as he speaks perfect English. Unlike the CrisCam unit the adapter is supplied without a battery but you can obtain the correct SR44's easily elsewhere. Frans also allows purchasers three months to return the adapter for a refund for any reason at all.

Please note that many of the links are to a UK battery supplier. I'm not connected with them in any way, but if you're in the UK/Europe I highly recommend them. However, my reason for linking to them is solely for the comprehensive information they provide.

Good luck whatever you decide, and I trust that you will return the favour by taking a brief moment to rate my answer.

Posted on Sep 10, 2010

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