Originally posted by pathdoc If I were going to buy one of the two and IF money were no object, I would buy the 77 over the 70, because the official forum test found very little to choose between them and it'd be compatible with ALL my K-mount bodies, film and digital, into the foreseeable future. However, I appreciate that for many, this state of affairs isn't the case. When money considerations rule, it's bang-for-the-buck.
And then Black Friday happened and the 15mm ruled my mind (holidays to scenic places are in the works) and money was an object. The 70 was a steal at the B&H price, and a new 77 was that much more that even for an extra stop of light and cross platform capability I couldn't justify it.
Now I will (after December 25th) have that 15/40/70 kit I was theorising about. I did seriously consider the 21, but I already have plenty of lenses which cover that FL and I didn't think the 15 and 21 were far enough apart to justify owning both.
Yet.