I ordered the Sigma 18-300 for Pentax Mount today on Amazon after seeing it shown as "In Stock". I called the store that listed it as being in stock, and the person went into the warehouse, got the lens, and told me on the phone that he had it in his hand. I thanked him, and ordered it within minutes on Amazon, while it was still available. I checked on Amazon later, and it showed that it was not available as currently "In Stock". Supposedly I got the last one currently available at that time. I am happy. I have been waiting, and checking off and on on the internet since last year when the lens was announced. I have the 150-500 on my K5IIS, and am going to take the 18-55 AL II I have on my K5 and replace it with the 18-300 for versatility. I find if I use a proper F stop with the zoom lenses that they maintain detail/sharpness throughout their ranges. I will most likely upgrade my kit to a newer model Pentax body which lacks the AA filter in the future. The K3II and the upcoming FF are certainly interesting. In sticking with the APS-C, such as the K3II, the telephoto range I still find valuable, but the FF has its valuable attributes also. In the meantime, the K5 which does well, will be using the lens.
Last edited by C_Jones; 08-15-2015 at 02:29 PM.