I want to sell my Canon 35mm SLR's and I have 2 Canon EF. I need to check them so what kind of battery should I put in them to test.
Batteries for Canon EF
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- Thread starter Chan Tran
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Chan,
I believe that the EF uses 1.3V Mercury Batteries so if you want to test the accuracy of the meter you will have to buy a WEIN cell (example: Wein Battery) or an adapter (example: Adapter). I am not sure if the EF had a voltage regulator (I want to say yes, but I am not sure). In that case you may be able to use a 1.5V battery and no adapter.
claudio
I believe that the EF uses 1.3V Mercury Batteries so if you want to test the accuracy of the meter you will have to buy a WEIN cell (example: Wein Battery) or an adapter (example: Adapter). I am not sure if the EF had a voltage regulator (I want to say yes, but I am not sure). In that case you may be able to use a 1.5V battery and no adapter.
claudio
None! I never liked Canon. I got them to prove to myself that I was right not buying them back when they were new.
I have a Canon EF and I can assure you that they do have a voltage regulator, work very happily and give correct exposures with ordinary PX 625A alkaline batteries. I have checked mine with a Kodak Grey Card and a 1-degree digital spotmeter and it's absolutely correct. I believe the EFs will also work correctly with PX S625 1.55 Volt silver oxide cells which are longer lasting but more difficult to find.
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The Mercury batteries were PX 625 and were 1.35 Volts
Thanks everyone. I will get some of those alkalines and test them. I believe one of them works perfectly and the other has some problems. Yeah I am getting rid of Canon. I will let my Canonflex go first then the EF's and then the AE-1, A-1 and AE-1P. Last will be the Canonet QL 17
Canon EF works perfectly with 1.5V alkalines. It is not sensitive to voltage variations due to the design of the meter.
This is an outrage!!
No! I have to reduce my collection and the Canon's have to go first.
I understand. Which 35mm SLRs will you keep, then?
I think I will keep the Nikon's. I currently have the F3, F4 and F5 plus 1 FE, 2 FM, 1 FM2n, 1 EM. I think I will keep the F3, F4, F5 and add an F2 but getting rid of others except an FM or the FM2n. As I already got the Minolta XK sold, I think I will sell the XD-11 next and 1 of the SRT-101 and may be keeping 1. I would also let the Olympus OM-2n go. I would try to get rid of the Minolta 9xi, 800si, Maxxum 70 (these 3 may worth next to nothing) and keeping may be just the Maxxum 7.Oh yeah and then the Pentax. The K1000 first then the ME Super and may be 1 of the KX and keep one of the KX. Oh and also the S3 which isn't working right.
That as far as 35mm SLR goes. I have a few 35mm rangefinders and of course no Leica.
How come nobody mentions Zinc-air hearing aid batteries? Difference in voltage is negligible. Aye, tey don't last as long as mercury or silver cells, but it should be more than enough for testing purposes. I use one in OM-1, lasts for roughly four months.
He only wants to test the accuracy of the EFs meters before he puts them up for sale he doesn't need them to last, and PX625 alkaline cells actually last a lot longer than Zinc-Air cells and are a great deal cheaper.
MattKing
Moderator
If you have or can kludge together the necessary adaptor, a Zinc-Air hearing aid cell is by far the cheapest option, and gives exactly the same service as the "Wein" cels.
Granted he needs the battery just for testing, but for those who want them to last, Alkaline voltage discharge curve is much steeper than that of Silver oxide, or Zn-air. In other words, exposure meter will work with random precision with Alkaline, unless a voltage regulator is incorporated and the only camera that has it, should be Spotmatic. Don't know if EF's regulator operates in same manner.
And between those two cells, Zinc-air is cheaper.
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Having owned and used an EF for about fifteen years mainly shooting transparency films, I can assure you that The EFs battery voltage regulator works perfectly well with Alkaline PX625A batteries.
Yup I do not think the meter of the EF is battery voltage dependent. It has 2 batteries and they are connected together in a rather strange fashion. Not really in series or parallel.
I hope you find good homes for EFs Chan, they are very underrated, because at the time they came out were unique in offering a Silicon cell lightmeter, a Copal Square vertical running, a hybrid electro-mechanical metal shutter coupled with shutter priority AE exposure control that no other manufacturer in those days could match. I use mine for street shooting and wouldn't part with it.
Hi Ben,
Although I haven't put batteries in them yet. One of the is considered no good as the shutter speed indicator in the viewfinder came off some how. Mechanically the shutter is fine. If I remember right with batteries it didn't work right either. I remembered that it won't work in A if I install 2 batteries and A work if only 1 battery is installed. It's kinda strange. Also the electronic long shutter speed doesn't work on this one.
I will put the batteries in the other one and I remembered that it was working perfectly.
I never have any version of the F1, my brother has the last version of the F1 and he loved it. Among the Canon SLR's I have I like the EF quite well.
Although I haven't put batteries in them yet. One of the is considered no good as the shutter speed indicator in the viewfinder came off some how. Mechanically the shutter is fine. If I remember right with batteries it didn't work right either. I remembered that it won't work in A if I install 2 batteries and A work if only 1 battery is installed. It's kinda strange. Also the electronic long shutter speed doesn't work on this one.
I will put the batteries in the other one and I remembered that it was working perfectly.
I never have any version of the F1, my brother has the last version of the F1 and he loved it. Among the Canon SLR's I have I like the EF quite well.
The New F1 is the best professional film S.L.R. I have ever used I settled on that model almost thirty years ago, it does everything I need and I have never been interested (except for two F1ns I, bought fairly recently) in any other make of camera. The only drawback of Canon F1s to me is they are heavy.
I found zinc air didn't last nearly as long as Wein, but neither came close to the original batteries. Loved my EF but it got stolen, along with an old F1 and a PC lens....serious mourning. I replaced the F1, so then I could tote two of the damned things. Great for self defense in a dark alley.
As a person who has taken a good look at the EF service manual, and have disassembled my EF, what happens is the following: For some usages the camera require 1.35V, for others, 2.70V. Thus, depending on the selection of the flash modfe switch (CAT vs NORMAL), the connection of the batteries will change between series vs using only one battery.
BTW it will work indistinctly with 1.35V or 1.5V cells because the silicon photo diode is amplified using an operational amplifier. Thus, gain of the amplifier will not depend on power supply voltage! Well done Canon!
This Operational amplifier IC is very static sensitive, so it shouldn't be touched!
This is an easy fix.
See above explanation.
The battery holder has the inner positive and negative contacts beneath very close, separated by a very thin film. Humidity and corrosion will make havoc. Of course this is a very easy thing to fix. Many "electronic failures" on electronic cameras are just... the camera getting no power from the battery compartment!!
My EF had such a problem, but in this case the camera did work, however the batteries drained quickly. Cleaning the wiring and contacts beneath the battery holder and introducing electrical tape as additional insulation cured the problem.
... because the long speeds depend on the two batteries connected in series. Solve the battery compartment problem and the long shutter speeds should work.
This explains why you are leaving Canon! (emphasis)
If you like the EF, you might LOVE the F-1, particularly the New F-1.
I sold my EF, i didn't like it as much as my F-1 cameras. I even liked the A-1 more. There are people who say "the EF is the electronic version of the original F-1". This is bulls$%$$, internally they are completely different and the build quality of the F-1 is even higher. High, to an standard hitherto unseen on japanese cameras, making potential users lust passionately and making users salivate with delight upon touch. Better fit and finish than the Nikon F, F2 and the F3 (all of them wonderful cameras of course). I have owned all these cameras, so speak from direct experience.
However, the EF was priced at close the price of the F-1. This might explain why they were not a best-seller...
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