| Author |
Message |
    
Abuja
Tinkerer
Username: Abuja
Post Number: 1
Registered: 01-2013
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, January 04, 2013 - 02:27 pm: | 
|
good morning
I bought an Olympus OM 1 (black) to go back to shooting with film, the light meter registers 4 stops less than the Nikon D90.
Terms of metering, ISO 100 50 mm lens the two cameras facing the sky on a cloudy day, battery ok
D90 f v.130: 11
OM-1 v.125 f: 2.8
How to adjust the photometer, overhaul $ 180
I paid the OM-1, $ 226
thank you very much
Google Translation |
Fidji
Tinkerer
Username: Fidji
Post Number: 19
Registered: 12-2011
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, January 04, 2013 - 06:02 pm: |
|
OM1's should use a 1.35 volt mercury cell,which is no longer legal to make.There is a firm that makes an adapter so you can use a 1.5 volt alkaline cell,making it large enough to fit and also reducing the voltage to 1.35 volts.
Check out:- https://kyp.hauslendale.com/classics/mercurybattery.html |
Br1078lum
Tinkerer
Username: Br1078lum
Post Number: 450
Registered: 11-2010
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, January 04, 2013 - 07:22 pm: |
|
You can also get a direct same size and voltage replacement battery called a Wein Cell at http://www.micro-tools.com/store/home.aspx
PF |
Lrsnrl
Tinkerer
Username: Lrsnrl
Post Number: 27
Registered: 02-2010
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, January 04, 2013 - 09:58 pm: |
|
Try this site for some info on how different
battery voltages affect exposure.
http://olympus.dementix.org/Hardware/PDFs/
DiodeVer2_1C.pdf
The readings you are experiencing should not be
that far off so your camera probably needs to be
calibrated and the 1.35v battery would not help
much. |
G3bill
Tinkerer
Username: G3bill
Post Number: 42
Registered: 12-2012
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, January 05, 2013 - 01:14 am: |
|
The Wein zinc air cell? I can't find a thumbs down symbol If you're in a bind and need a battery today ok, but I bought one years ago and never again, didn't last anywhere near a year....IMO its JUNK! and not the best way to go... |
Fidji
Tinkerer
Username: Fidji
Post Number: 20
Registered: 12-2011
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, January 05, 2013 - 03:55 am: |
|
Whatever you decide to use for powering the meter,if you still have a couple of stops out I personally would just adjust the ASA film speed dial to compensate.If you use the same speed film most of the time it's no hassle.Old camera meters will not be as accurate as DSLR's anyway.Be thankful for great latitude in modern film! |
Abuja
Tinkerer
Username: Abuja
Post Number: 2
Registered: 01-2013
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, January 05, 2013 - 12:06 pm: |
|
Garner, MacFarland and Larsno, thanks for the links, I solved the problem battery (battery hearing 1.4v).
I want to solve the problem in the camera must have an internal adjustment in the machine.
Garner, to compensate for this difference, with ISO 100 film, the OM 1 have to use ISO 1600
Google translation, thanks |
Br1078lum
Tinkerer
Username: Br1078lum
Post Number: 451
Registered: 11-2010
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, January 05, 2013 - 09:07 pm: |
|
You may have some high resistance in the circuit somewhere. Especially if the batteries ever leaked, as the corrosion will work it's way up the wire to the meter. I'd take the top off the camera, and check the resistance of the battery lead to the meter, look for corrosion around the ends of the wire, and maybe run a bypass jumper to see if the meter reacts properly. Other than that, CdS cells do go bad sometimes.
PF |
