Originally posted by hadi that shouldn't be a problem, as i hardly ever use continuous focus on pentax. usually i focus, recompose, shoot, and keep repeating that.
so a leg up on that with no need to recompose after focusing should work well with the A7II i suppose
alternatively speaking, a used A7RII is not that much more than a new A7II. but perhaps the A7RII is too much of a camera for my needs, as the Pentax K1 seems to work beautifully for almost everything i do.
btw, going back to my previous question, what is the difference between the already existing Sigma 135mm vs the NEW sigma 135 released for the sony camera? is it just the MC11 adapter vs no adapter?
The software in the new lenses is completely new. They are not using the same software as the adapter.
You should really look at the Zeiss Batis line of lenses. The 135mm APO is an optically excellent lens that is the perfect size for the A7II body.
Batis 135, is it a keeper? - FM Forums If you read through the Fred Miranda link you will see some Sigma 135mm to Batis 135mm comparisons.
Review: Zeiss 135mm f2.8 Batis (Sony E Mount, Full Frame)
The APO element means that there is very little chromatic aberration and it has excellent color and contrast. Autofocus is very fast. The Sigma 135mm is an excellent lens, but its only advantage is that it is F/1.8. The Batis 135mm is sharper, better color, better contrast (but not as much as the Batis 85mm), faster AF, smaller, lighter, OIS, weather sealed, and less CA. The Sigma is F/1.8, but is slower to focus, has a slight warm cast (which some people like), and weighs 2x as much as the Batis. The Sigma is still very sharp and has the F/1.8 bokeh.
The Batis is currently on sale for $1,500. I use to live and die by fast glass back in the film days, but with clean ISO 6400 in modern cameras I don't see as much need for it. I will probably buy the Sigma 105mm F/1.4 as my fast glass portrait lens, but use the Batis 85mm & 135mm APO most of the time. You need to use an APO lens to really appreciate the value and what it does.