Originally posted by amstel78 Thanks Mike! For a small lens, the 35mm f/2 does deliver. I've briefly seen what it could do on the K-1, but decided not to post any of those photos since they're just quick snaps of my fridge magnets under poor light. Tomorrow in NYC, it's supposed to be warm and sunny so I'll put it through its paces then.
As for my comment about it being soft; I've been using a 50mm HD FA* on my K1-II which is ridiculously sharp wide open. I've also been blessed with owning a K1 that has perfect AF calibration out of the box, meaning I haven't had to adjust anything. I guess I've been spoiled. To be fair though, the 50mm star lens cost almost 3x the price (as well as size and weight) of this 35mm prime.
Yeah, that D FA*50/1.4 will skew your view of sharpness compared to any other lens, I think
I have a fondness for the rendering of film-era lenses, so maybe I'm pre-disposed to liking the HD FA35/2's output.
Incidentally, my K-3 and K-3II were identical out of the box on AF calibration. Four of my HD DA Limiteds, my D FA100/2.8 Macro WR, HD DA55-300 and DA50/1.8 are spot on with no AF fine adjustment. My other HD DA Limiteds and FA50/1.4 are wihin +/-2, and my DA35/2.4 requires -3. Exactly the same on both bodies. Like you, I consider myself very fortunate on that score.
Originally posted by amstel78 Regarding the backfocus issues on the K10D; only after googling today did I also discover that it seems to be a fairly common issue with that particular body. I also started going through some of my older photos in lightroom taken with the K10D and the 17-135WR, and noticed that most photos under F8 were soft or OOF. Some at f4.5 looked sharp enough to pass muster, so not really sure what's going on there. I've had the focus screen out a few times for periodic maintenance but haven't touched the primary or secondary AF mirrors, so I doubt whatever I've done could have caused an AF discrepancy from when I first bought the body to today.
Using a couple of the HD DA Limited lenses I know are perfect on my K-3 and K-3II with zero AF fine adjustment, through trial and error I was able to find out that my first GX-10 required +110 to get the same accurate focus. I was also able to figure out that a +1 adjustment increment on the K-3 is equal to a -10 increment on the GX-10, while a -1 increment on the K-3 is equivalent to +10 on the GX-10. Based on that, I came up with the following translation table for adjusting the GX-10 for each of my lenses, given a known K-3 adjustment:
It works perfectly, every time. Any time it doesn't, those are outlier shots, IMHO. Obviously, my numbers are specific to my K-3 and GX-10, but it's worth remembering (if you didn't know already) that +1 and -1 increments on the K-3 AF fine adjustment (and, I'd guess, on the K-1?) are equivalent to -10 and +10 respectively on the GX-10 / K10D...