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 screw 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
Auto diaphragm
Instant return mirror
Self-timer
Auto diaphragm
Instant return mirror
Self-timer
Has a mirror lock up when self timer is used(?).
Auto diaphragm
Instant return mirror
Self-timer
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
Battery: PX675 (MRB675) (Thank you, Lar Kaufman!)
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.
Fixed pentaprism
Shutter: 4-1/1000,B (cloth, electronic?)
Flash: Standard X and F synch and hot shoe, flash synch at 1/60
Metering: stoped-down TTL metering or spot mettering
Battery: 2xSR44 or 2xA76
Auto diaphragm
Instant return mirror
Self-timer
Can provide auto-aperture mettering with XC-A adapter
The Vivitar XC-2 has average and spot metering which should be the
same as Cosina CSR. It also has multi-exposure lever under film forwarding
lever. There is + sign right under the center split when you look through
viewfinder which I belive it indicates the spot metering range, even I don't
have the manual to read. There are 3 sensors in the mirror to read light
directly and the middle one is smaller than the other two which is the spot
meter sensor. The camera is the smallest in size I have had, and I think it
should be the top among XC product line. The electronic shutter is accurate and
shutter is quiter because of cloth. I got this camera from ebay with the XC-A
adapter which will allow you to change to camera into apreture priority exposure
one when you mounted on. The adapter also can be used in all the XC cameras.
The Vivitar VMC 50mmf1.7 lens come with the camera is really a gem. It is the
smallest 50mmf1.7 I have ever seen and the VMC coating is great, looks more
beautiful than my SMC takumar lenes. I tried 2 rolls of film through the camera
and the photos come out great. I nerver believe that this low priced camera can
give such great result. I will keep it.