In manual mode (M) only the 1st bracketing selection seems to
work.... from memory that's 0, +, -

Setting 3 seems to give T, 0.5 of T, 0.25 of T
which is very inconvenient and needs fixing by
Pentax

.

See.....

http://www.bbc.co.uk/news/magazine-22781861

This is the one you need, but it has a stiff aperture ring.
Note the lettering starts with SMC and is the right way
up when the lens is stood on the bayonet cap.

Ebay_BIN £50 + £5.50

'

Excellent lens Phill. One of the nicest to use zooms I've ever
had. The 35-70mm f/4 is a very good lens, but the 28-80mm SMC
should be sharper. It was probably a lot more expensive in the day.

Make sure it is the SMC version, other versions inc. the
Takumar one were made by another factory. The most obvious
difference apart from saying SMC is that the lettering around
the filter end of the lens is upside down compared to the cheaper
versions and it has the usual cream/white wart for lens location
compared with red on the cheaper ones.

This was just a record shot of a gas tower being taken down 2 years ago....

SMC A 28-80mm at f/11 K-5 200ISO Handheld




And a full size (1:1 or 100%) crop of the upper left.
Most lenses would be very soft so close to the corner.




-

I would have thought they would want to move forward,
rather than just sell to a few people.

I remember Ford bringing out cars with no name based
on (I think) the Scorpio ........... seem to remember
that being the end of the line for that range. People
saw them on the road, but had no idea what they were

The Mondeo was the biggest they sold after that.

'

Nice shot Stan ....... even though it has a magenta cast!

'

Stop posting dirty pictures!

'

"Glad they took the step to APS-C that's where everyone's going!"

APS-C is the future!

BIG MISTAKE not to put the name on the front of the camera
I don't think Pentax-Ricoh want anyone to know about them
I can't imagine Leica bringing a camera out without their
name.

Perhaps they will also drop the Pentax name off SLR's

'

You lead very interesting lives!

'

Dino Direct used to do one, but I've just looked and they
only have one for a Contax with a flange.

On some lenses such as the Russian ones a piece of
electrical cable insulation can be put in to keep
the pin pushed in. I'm sure there must be info
somewhere about what to do with Mamiya's? It's
only if the rear of the lens can't be put back together
with the pin depressed that you have a problem.
Some Yashica's are like that.

'