Hasseblad Time Exposures

My 150mm, f/4 T* Carl Ziess Sonar CF does not have "T" setting? Question:
1. Should I assume that I must use a cable release that can be locked down for long exposures?
2. In searching Googling for this answer, I found an astonishing observation. Ostensibly, after 30-seconds the lens or the shutter on the back closed?
Any comments or guidance would be appreciated.

hortense said:

My 150mm, f/4 T* Carl Ziess Sonar CF does not have "T" setting? Question:

1. Should I assume that I must use a cable release that can be locked down for long exposures?

Click to expand...

Yes, indeed!

hortense said:

2. In searching Googling for this answer, I found an astonishing observation. Ostensibly, after 30-seconds the lens or the shutter on the back closed?
Any comments or guidance would be appreciated.

Click to expand...

Maybe the Bulb setting of that individual only reach 30 sec of exposure time?
Shutter on the back?
Never heard such thing as an hasselblad back with shutter!

Get that cable release, put B setting on your CF and shoot away!

Cheers

André

Thanks Andre. I appreciate you timely answer as we are leaving in 15-minutes for our trip to the South Fork of the San Joauquin River way back in the Sierra Nevada.