Ok, I'm having a look at the pictures now. In the same area, I took 77 similar photos in af-c: 55 of them were slightly out of focus (only 2 really bad), and 22 of them were in good focus. This is, 71.4% of the pics were a bit off, less than 1/3 were good.
I took then other 65 photos in single af, also with eye-af on, and here 44 were in good focus and 21 slightly defocused, so the hit rate was a bit higher than 2/3, much better than in af-c.
This is what i consider in focus and slightly off (in some of them a bit more off, in some of them a bit less). This is a 200% zoom in my macbook pro retina, so should be around 100% zoom in a non-HDPI display.
*I've only applied one of my lightroom presets to the picture. I´ll later upload a couple of raws for you to check the quality at far distance (building) at 1.4 and evaluate my copy of the lens (same pic taken normal and with the camera upside down).
Your hit ratio should be better than that. I just looked at the first 20 shots I took on Saturday with the 85 and at Lighroom 1to1 they all look in focus to me. This is with an A7R3 using AFC and eye focus. This 1 to 1 and 2 to 1 ratio may be misleading. 2 TO 1 on my screen is maybe 5% of the image (maybe even less) and at that enlargement I do see some degradation but don't believe it is mis-focus as much as total resolution. I would be interested in the comments of other members.
jmmaher wrote:
Your hit ratio should be better than that. I just looked at the first 20 shots I took on Saturday with the 85 and at Lighroom 1to1 they all look in focus to me. This is with an A7R3 using AFC and eye focus. This 1 to 1 and 2 to 1 ratio may be misleading. 2 TO 1 on my screen is maybe 5% of the image (maybe even less) and at that enlargement I do see some degradation but don't believe it is mis-focus as much as total resolution. I would be interested in the comments of other members....Show more →
But if I show you 2 pics in the same magnification and you see one is clearly sharper than the other, it's clear that it's not a magnification issue.
I'll upload a few raws tomorrow for you guys to check. And I'll try to go to the shop to ask for another copy of the lens in case...
jmmaher wrote:
Your hit ratio should be better than that. I just looked at the first 20 shots I took on Saturday with the 85 and at Lighroom 1to1 they all look in focus to me. This is with an A7R3 using AFC and eye focus. This 1 to 1 and 2 to 1 ratio may be misleading. 2 TO 1 on my screen is maybe 5% of the image (maybe even less) and at that enlargement I do see some degradation but don't believe it is mis-focus as much as total resolution. I would be interested in the comments of other members....Show more →
This is indeed odd.
I rarely get miss-focus with this lens. Perhaps there is variation on focus accuracy?
Fred Miranda wrote:
This is indeed odd.
I rarely get miss-focus with this lens. Perhaps there is variation on focus accuracy?
Maybe because my boyfriend is dark and the weather is quite cloudy /rainy in Hong Kong now, and also indoors where the rest of my tests were? I'll upload some raws tomorrow from campus. I'm liking the lens much more than expected for the rendering, but the af in the Sony 85 was like 100% or almost, and this one if manually focused it's actually the same or even sharper than the Sony at 1.4 (samyang 1.4, Sony 1.8), but the af is trash 😩
I doubt it has much to do with your boyfriend’s skin complexion. If you even miss a third of your shots in AF-S while Eye-AF is telling you everything is good then that’s cause for concern. I’d definitely return it.
numbertwo wrote:
Maybe because my boyfriend is dark and the weather is quite cloudy /rainy in Hong Kong now, and also indoors where the rest of my tests were? I'll upload some raws tomorrow from campus. I'm liking the lens much more than expected for the rendering, but the af in the Sony 85 was like 100% or almost, and this one if manually focused it's actually the same or even sharper than the Sony at 1.4 (samyang 1.4, Sony 1.8), but the af is trash 😩
Last update addressed all my AF concerns. Lens is performing very well. Maybe yours is defective?
In the following link you can check a few raw samples I took yesterday. There is a folder containing pics I consider in focus, and another one with pics I consider out of focus. In af-c, the out of focus are like 71%, whereas in af-s the oof are around 31% (but in those folder I uploaded an equal number for comparison)
There's a third folder with a wall test shot at 1.4 to check eveness. One picture was manually focused in the center of the wall (even if there are trees in front), and the other one was taken keeping the same focus point and turning the camera upside down. I think both sides look quite the same, so I think the lens is well centered.
p.21 #10 · Official: Samyang AF 85mm 1.4 FE ($699)
Ok, long story short, I got a second copy from the same shop, and that copy was focusing much better for people but it was always failing in far objects and the af spots looked really nervous, acting weirdly. Then I realised there was a big white spot (not dust, quite bigger) in the center of the lens. I brought it back and in that shop they didn't have more stock, so I had my money back and bought the lens in a different shop, and so far in this lens the af is working fine for both portraits and buildings, I'll keep testing for homogeneity this weekend but I'm very happy so far, the lens look sharper at 1.4 in the eye and it's nailing always (also firmware 0.3)
p.21 #11 · Official: Samyang AF 85mm 1.4 FE ($699)
Not acceptable to me,having to make 3 trips buying & returning lenses to find a good one. Ridiculous.
numbertwo wrote:
Ok, long story short, I got a second copy from the same shop, and that copy was focusing much better for people but it was always failing in far objects and the af spots looked really nervous, acting weirdly. Then I realised there was a big white spot (not dust, quite bigger) in the center of the lens. I brought it back and in that shop they didn't have more stock, so I had my money back and bought the lens in a different shop, and so far in this lens the af is working fine for both portraits and buildings, I'll keep testing for homogeneity this weekend but I'm very happy so far, the lens look sharper at 1.4 in the eye and it's nailing always (also firmware 0.3)...Show more →
p.21 #12 · Official: Samyang AF 85mm 1.4 FE ($699)
KarmaKramer wrote:
Not acceptable to me,having to make 3 trips buying & returning lenses to find a good one. Ridiculous.
Totally, thanks God I live close to the shops. What is weird is that that little shop with such a good price (and official warranty) had two lemons. Maybe samyang somehow knows and gives better or worse copies depending on the store?
p.21 #14 · Official: Samyang AF 85mm 1.4 FE ($699)
Nothing, this copy in daylight is still not correctly focusing half of the pictures at full body portrait distances and further. Closer it's OK, more or less as the first copy. The problem is mid distances. Af-c wide area, af priority for both af-s and Af-c.
I checked centering and this one has better corners at 1.4 than my Sony 85 did at 2.8, crazy (but I feel my first copy was a bit better centered). Also better resolution across the frame than the Sony 85, although the field in this copy seems a bit tilted and focusing in the center, the right side is a bit softer and center and left are sharp.
I'll do a few more test and check in my computer.
p.21 #17 · Official: Samyang AF 85mm 1.4 FE ($699)
Or maybe the a7III is less accurate than the a7r3 others are reporting? It happens when the face is small in the frame, but still my hit rate is better in this copy than the first one. Anyways, my sigma 35 is accurate basically always, and my 85 1.8 was as well, and my canon 70-200...
I'll post some more rendering samples.
After looking at infinity tests and indoor test charts, yes, it seems the right side (near the edge, not noticeable from the center- right) is a bit tilted, and specially the top right corner is a bit softer than the left ones. If focusing in that corner, only the right side is in focus and the center and left side is a bit oof. In the first copy, also the right side was worse in the test chart test indoors, but at infinity all 4 corners looked about the same.
p.21 #19 · Official: Samyang AF 85mm 1.4 FE ($699)
Focusing off center will typically be where any failure to achieve hit rate will be. Also these lenses have a lot of copy variance. It really is hit or miss.
Face small in frame again will be less accurate than bigger, no question on that one. When I’m using a Eye AF doing my runway shows. At full distance it will pick up the eye but I’ll get one or two misses until I’m basically at three quarters length on the model, than it will stick better.
I’m still trying to get out and test more but my health recovery has been almost 3 weeks now. I’m going crazy.
Maybe try using medium spot and see if that helps. Or one other thing is start in like zone focus. Try a couple settings
BTW your doing a great job just keep plugging away
