LAST EDITED ON Jun-21-01 AT 11:55 AM (GMT)
Hi everyone ,
I own an Olympus OM4. A feature that camera has is the ability to close the shutter when enough light has reached the film plane while shooting.
Thus when I shoot a difficult macro subject , I just put the camera in Auto , and with a flash that is NOT connected in any way to the camera body , I start to fire small bursts at the subject at different angles. When the exposure is judjed OK by the camera (which can take for example 20 flashes and 4 - 5 minutes of time) the camera closes the shutter and the picture is finished. I get Perfect results every time !
What I nned to know.... Is there any other camera except Olympus which can meter the subject while the shutter is open and close the curtain accordingly ?
Thank you for your time
#1. "RE: Olympus OM metering unique ??" | In response to Reply # 0Merlin Basic MemberThu 21-Jun-01 10:28 AM
To be honest, I've never tried it, but at least in theory any good SLR with an Off-The-Film (OTF) metering system should be able to do the same trick. The technique is normally used with the shutter on "B", and it's called "painting with light".
You've got my attention - my F3 should be able to do the same trick. I'll have to try it out, but I think there's a limit to how long the shutter will stay open.
Anybody else tried this?
#2. "RE: Olympus OM metering unique ??" | In response to Reply # 1BJNicholls Charter MemberThu 21-Jun-01 07:25 PM
As a former Olympus guy, I know how well the OTF metering works for long exposures. I've never tried the same kind of shot with my F100 or N80.
Nikon doesn't spend any effort describing this feature in the manuals. From what I've read, I think the OTF metering Nikon uses only applies during flash exposure. If this is true, Nikon isn't as capable as the OM4, which can adapt for changing light during a long conventional exposure.
If this is wrong, I'd love to find out otherwise...
#3. "RE: Olympus OM metering unique ??" | In response to Reply # 1
LAST EDITED ON Jun-22-01 AT 11:53 AM (GMT)
Painting with light on B is common and can be done with any camera that can keep the shutter open for some time. But the exposure is Not judged by the camera but by trial and error or by the Flash itself.
Olympus has a metering cell in an angle exactly in front of the inside of the curtain. Thus when the shutter is open and the picture underway , the OM is measuring the light that falls on the film. Or better is measuring the light that is reflected from the surface of the film and closes the shutter accordingly.
Imagine taking a picture on an overcast day with an estimated exposure of 12 secs and in the middle of the exposure there is a lighting. The OM Will close the shutter as soon the lighting strikes and the light that falls on the film will be ok.
You can put anything infront of the OM lens or no lens , bellows , tubes.. you dont even have to have connection with the camera lens mount. the metering works anyway and closes the shutter when the exposure is ok.
#4. "RE: Olympus OM metering unique ??" | In response to Reply # 3BJNicholls Charter MemberFri 22-Jun-01 04:43 PM
I think Nikon's OTF only works this way during flash exposure (TTL flash metering was also an Olympus innovation). Unless I'm mistaken, a Nikon's non-flash exposures are set when you fire the shutter and the exposure won't be modified even if light conditions change during a longer exposure. I believe the Olympus is still the low light metering king.