Cosina SLR 1970?-??
Auto diaphragm
Instant return mirror
Self-timer
Has a mirror lock up when the self timer is used.
This black (chrome model exist but appears to be less common) camera is very
common in Australia (or at least in Canberra). I have one and like it. The only
problem is that sometimes the shutter speed dial, which is in front, may be
accidentally moved by a finger. But that seems to happen less and less
frequently now.
I like 1/125 flash synch that is not that common in thread mount cameras.
Meter is switched on by a sliding exposure meter switch as on Spotmatics,
but it needs to be moved down, not up as on Spotmatics.
Auto diaphragm
Instant return mirror
Self-timer
Has a mirror lock up when the self timer is used.
Auto diaphragm
Instant return mirror
Self-timer
Has a mirror lock up when self timer is used.
Pressing the shutter cause the diaphragm of the lens to close and turned the
meter on. Shutter speeds are shown in the viewfinder using needle. Diaphragm may
be reopened using the button near the lens mount.
Auto diaphragm
Instant return mirror
Self-timer
Has a mirror lock up when self timer is used(?).
Auto diaphragm
Instant return mirror
Self-timer
Fixed pentaprism
Shutter: 1-1/1000,B (vertical metal mechanical)
Flash: Standard X and F synch and hot shoe, flash synch at 1/125
Metering: stoped-down TTL metering
Auto diaphragm
Instant return mirror
Self-timer
Has a mirror lock up when the self timer is used.
I believe the Vivitar 250/SL was introduced toward the end of the screw mount
period because it has a vertical-running metal shutter which gives it flash sync
of 1/125. Despite many of its relative modern functions (comparing with other
screw-mount cameras), it's rather cheap due to its off-brand status. It is a
good camera to kick around and take to hike or river rafting. Don't know about
its long-term reliability, but who cares.