Very curious to see your results Pradeep, I just took delivery of a 645z and I'm going to be trying similar tests to see what I'm gonna with the A7R2. I'm waiting now for the 75, 120 macro, and 150. I'm trying to decide what to do at the wide end.
turtle: I was very close to buying the 55 considering the great reviews people have online. However I don't understand why, I have not seen a single full-size image sample of this lens that has even decent corner performance, from what I've seen it's straight up bad for landscape. Maybe the reviews are from portrait shooters that are looking at the rendering and center performance.
How do you feel about the difference between the 35 A, and 28-45? Do you feel it's that much better regarding the cost difference? I don't mind shelling out for the 28-45 if it's a must have, but it's a huge chunk of change. My whole reason of switching to the 645z was to save money from the Phase system, the 28-45 would take a big bite out of that.
The 28-45 indeed is a lot of money, but expect that with most new lenses coming out for the 645 from here on. It is a big, hungry sensor and needs the best glass in front.
Anyway, here are some test shots. This was an absolutely unscientific comparison, I will admit right here and now. I was just curious to see if the Sony can come close. When I tested the Canon 5DSR against the Pentax, there was no comparison at all, the Pentax was simply better. Given that both are 50MP sensors the differences were obviously due to the size/technology of the sensors and the lenses I used.
I will repeat the methodology. I wanted to look at a simple backyard image, will probably do a test at infinity one of these days with buildings and such. Anyway, I put up the Edmund Optics Resolving chart up on my garage wall against a window. Testing different focal lengths is hard with this set up so all i did was equalize the FOV. Now I know that is not the best way to do it perhaps and the higher MP of the Pentax increases the size of the chart at 100%, but it is not too much of a difference, IMHO.
I tested the Batis 25 and 85 on the Sony along with the ZA 35 2.8, 55 1.8 and also used two Canon lenses with the Metabones adapter (Mk IV with the latest firmware).
For the Pentax I used the FA 45-85 f4.5, the DFA 55 2.8, the FA 120 f4 macro and the FA 150 2.8 I seem to have misplaced my FA 75 but will test that another day. I took multiple shots at 1-stop interval starting from wide open to f11. Tripod, mirror up, self-timer etc.
These are all JPG versions. I can upload the RAW files if I can figure out how. In my testing previously, I had discovered that my sharpest non-wide lens on the Sony is the 85 Batis and on the Pentax my overall sharpest is the 150 2.8 (my copy of the famed 120 macro is less than stellar). So here are images from the Batis 85 and the FA 150 both at f8 since we are talking landscape apertures.
I will leave the comments for you all. Attaching a few more images in the next post..........