Thank God everyone here is so patient with yet another "which lens should I buy question" at least I tried to keep the title intersting
A little background as to my issue - I first considered a DSLR back in 2004 - I purchased the K100D about 2 months ago. Since that purchase have goggled , read numerous reviews (some great ones here) and I guess I don't want to wait another 3 years to make a purchase. I am committed to Pentax Glass (mounts) and will upgrade the Body at some point later when I get more competent and outgrow the K100D.
I immediately purchased the Sigma DC 18-135MM f3.5 -5.6 and the Sigma 70-300mm DG f4 - 5.6 Macro. I had planned on using the Sigma DC 18-135 as a walk around lens - but a little disappointed with the low light capabilities and speed.
I had a few other posts about buying the Pentax DA 14mm F2.8 lens for a good price - but waived on that as it is a great lens - not sure Wide Angle is what I am looking for. Considered the Pentax SMC-DA 16-45mm F4.0 but not sure about F4 (I am a novice but learning aperture/ISO/ White Balance/ DOF / etc) and how it will perform in low light.
The other nugget of knowledge I have picked up here is primes versus zooms and that is a debate with no clear winner just fans on either side.
So what I am looking for I guess is a fast lens - Autofocus - for my K100D that is a good all purpose lens. I like the Sigma DG for close ups for now can live with the flaws (price was great though!). I like to take candid shots at baseball games, vacations and travel that range from people, places and things - can be in bright daylight or dusk or indoors even. Not big on macro photography at this point but may be later. Current camera case has enough space for two lenses and I suspect the 70-300 for now will always be one of them.
I know no one lens fits all - but based on the rather vague criteria above what would you recommend - For starters I was thinking about the Sigma Sigma AF18-50mm F2.8 EX - something in that range and speed. Others already highly recommended the Pentax D-FA 50mm F2.8 Macro (prime)
While price is always a consideration - I had previously committed to spend around $700 so that is what I am still looking at. In another post I did get some great feedback - but I had not really given any criteria on what type of photography I like to do now and what my issues are - so not really a duplicate thread - lets just say a close cousin.
Thanks for reading and any feedback offered - hard to believe I have been married over 20 years !