OM-2 OTF - how it works

[tomwawer]

Hi I am a new OManiac. I have got my first roll of OM-2 50/1.8 from

processing. Pics are beatiful. There is a lot of wonderful evening

shots with dead-on exposure on auto, all about 1, 1.5 or 2 seconds.

Reading tons of posts about OFT I rather expected it:)

 

I wonder what happens when shutter speed is faster than 1/60. I could

not find how it works. That is my hypothesis:

 

When firt curtain starts to move OTF begins to integrate light

reflecting from the first curtain dot pattern. When it comes to

proper exposure, sensor triggers second curtain, which starts to move

and makes a picture. Is it right? It would mean, that the shutter

speed might be like, 1/753233 sec ?

 

BTW "faster" pictures were also perfect:)

 

Any opinions?

 

Best regards,

Tom

[richard_oleson]

You've got the procedure exactly right, Thomasz. However, I don't think the system reacts quick enough to get you TOO far over 1/1000 second.

 

Another neat trick is that the signal for closing the second curtain also triggers the flash cutoff... so you get TTL flash at no extra charge.....

 

:)=

[tomwawer]

Thanks Richard! When I prepared to buy my camera I saw many of your posts, so please consider yourself a godfather to my OM:)

Now to flash cut-off - any flash or only T30-like? Will simple Auto/Manual flash with sync-cord catch the cut-off?<div></div>

[mark_bouquet1]

No. A simple auto/manual flash will not catch the cutoff. You need a dedicated flash. But it doesn't have to be Olympus brand. And, in fact, I think there are a lot of better options than the Olympus flashes now, for example Metz.

[richard_oleson]

Make sure, though, that the flash is fully dedicated, providing TTL control and not just the ready light for the viewfinder: a TTL dedicated flash will have 3 contacts on the bottom of the foot: center for the power, one side for the viewfinder display, the other side for the TTL control. also, with an OM2, you need Shoe 3 to work with a T-series or a third-party flash unit. Shoe 2 provides TTL control ONLY with the olympus "quick auto 310" flash.... my personal preference is the T32.

 

The OM2N has a different shoe, Shoe 4, and (like later models) works with the T-series but not the QA310.

 

:)=