Looks like you are going to have to give her the tablet and get a new one !

Super piece of success! I recall that image when you first put it on here. I recall it was also a winner then?

There is a regular stream of K1s on Ebay too - people can't get rid of them fast enough, or at least it appears so by comparison with the number of K5s and K3s that you don't see. I was initially tempted but seeing so many I began to wonder why?

I was thinking exactly the same thing. Thank you.

I didn't know the Greyhound's fame had spread so far!

What is the difference between an SDM motor and a PLM - as in 55-300mm and are there any issues with those?

Kris' comment at the top of the page is exactly why I mentioned the Takumar having an A/M switch. Beats green button most days. I know you asked about M42 28s but one K mount jobbie is a really good one -- the Miranda f2.8 28mm macro -- not a true macro but it's well worth trying one. There's a near identical 24mm too and both come in non-macro versions. These are green button jobs.
That tiny little pin is indeed a mystery. However, some Ebay sellers don't know about it and report the lens as faulty - a bargain beckons! I think it is to prevent the mechanism getting half activated while bouncing about in camera bags? Also, some Takumars have a great big square lump in the rear casting. Dunno what that is for either.

How can you not like a dog that looks at you like that?

Takumar f3.5 28mm is a nice lens. Like all Taks it handles well and gives glorious colours. The A/M switch is handy too.

My K3ii also tends to produce over light images so it's always on -0.3EV.