Originally posted by Nikhibhai RioRico, is the A28-80 a more professional, tougher lens to work with?
A-series zooms (some are very good and some aren't) are several generations old in terms of zoom design. The A28-80 isn't really highly regarded as a lens -- here are the reviews:
SMC Pentax-A 28-80mm F3.5-4.5 Reviews - A Zoom Lenses - Pentax Lens Reviews & Lens Database . Not terrible, just not superior.
I use A-zooms in particular circumstances: when there is plenty of light, or when I want to use flash, or when I'm using a tripod and the zoom doesn't exhibit zoom creep (gravity forcing a change in focal length). I have no problem with manual focus -- I shot for 40 years before I got my first AF setup -- but a major plus with Pentax dSLRs is SR, shake reduction. This allows shooting at lower shutter speeds.
All AF lenses for Pentax support automatic SR, but A-type and older zooms don't. SR can still be used, but it's problematic. With non-AF lenses, the camera's SR system (what I call the SR'bot) must be told the lens' focal length (FL). Tell it the right FL, and it's wonderful! Tell it the wrong FL, and it can make pictures blurrier. So with an A-zoom I can either:
1) re-enter the FL every time I zoom; or
2) enter some average FL but suffer at the extremes ; or
3) stay at the entered FL -- or
4) just switch SR off and shoot with faster shutters in adequate light.
I usually choose #4, sometimes #3, never #1 or #2.
A-types have advantages over earlier lenses. Aperture can be controlled by the camera, so they can be used in all Auto metering+exposure modes. They work with pTTL flash. They just don't AF, and they don't auto-SR.
So, back to your question: Is the A28-80 tough to work with? It's tougher than with a newer AF lens, yes. No problem, if you're aware of and don't mind working within its limits. As a first lens for a first dSLR, it will likely be disappointing. That's why I highly recommend starting with a decent AF lens, of which there are MANY, and many are cheap. And as mentioned, most dSLRs come with a kit lens attached, usually the DA18-55. Become accustomed to the DA18-55, then see what can be done with the A28-80. Have fun!