p.22 #2 · Pre-order: Sony FE 14mm f/1.8 GM ($1,598)
Bobu wrote:
Today I also managed to do the FC test with and without the Haida rear filter at infinity. Here are the results:
Wow, the corner crop at f/1.8 (focus on center) with filter looks much sharper than without filter. How can it be?
Even at f/5.6 from the same row, if I look at the roof and the grass in the lower part of the crop I think it is slightly sharper in the photo with the filter.
I'm very confused.
p.22 #3 · Pre-order: Sony FE 14mm f/1.8 GM ($1,598)
Maximilian wrote:
Wow, the corner crop at f/1.8 (focus on center) with filter looks much sharper than without filter. How can it be?
Even at f/5.6 from the same row, if I look at the roof and the grass in the lower part of the crop I think it is slightly sharper in the photo with the filter.
I'm very confused.
First the 14GM has with and without any filter a strong FC characteristic. Second as also shown by olalafoto the filter not only intensifies FC but also changes the shape of the FC, even turning around the direction. And third the FC behavior on this lens also strongly depends on the aperture and focus distance. Altogether this lens has a quite complex FC behavior and rear filters further complicate the situation. In this regard, the Sigma 14-24 is much easier to use.
p.22 #4 · Pre-order: Sony FE 14mm f/1.8 GM ($1,598)
Bobu wrote:
Altogether this lens has a quite complex FC behavior and rear filters further complicate the situation. In this regard, the Sigma 14-24 is much easier to use.
Oh je, this is quite exactly the contrary of the conclusions to which Lloyd Chambres has come...
p.22 #5 · Pre-order: Sony FE 14mm f/1.8 GM ($1,598)
The FC seems to be a compromise to get this small size. But if it only requires focusing on an off-center star for astro, that's fine. I don't see myself ever using <f4 for landscapes. The sigma is an amazing lens as well.
p.22 #6 · Pre-order: Sony FE 14mm f/1.8 GM ($1,598)
Bobu wrote:
Today I also managed to do the FC test with and without the Haida rear filter at infinity. Here are the results:
Interesting, my corners were not that bad when center focused, I had very minimal difference in the corners regardless of center or corner focus even at f1.8, it was a solid performance across the board.
p.22 #7 · Pre-order: Sony FE 14mm f/1.8 GM ($1,598)
NatDeroxL7 wrote:
Interesting, my corners were not that bad when center focused, I had very minimal difference in the corners regardless of center or corner focus even at f1.8, it was a solid performance across the board.
It's complicated. I am getting good results so I am just using the lens. Would have liked the Kase to have worked, but in perspective, this is a very nice compact and quite well corrected lens and love the weight. The lens cap is very nice as well!
p.22 #8 · Pre-order: Sony FE 14mm f/1.8 GM ($1,598)
juicer wrote:
The FC seems to be a compromise to get this small size. But if it only requires focusing on an off-center star for astro, that's fine. I don't see myself ever using <f4 for landscapes. The sigma is an amazing lens as well.
Yea that's the issue. If the FC is that bad, maybe mid-center focusing is a good compromise. The Sigma 14 1.8 has decent coma by 2.5 and the vignetting is close to gone so that's nice. But a stop is a stop. If you can shoot the Sony at 1.8 even with a little softness due to FC, it probably has better coma and better net-speed after vignetting than the Sigma at 1/2 the weight.
p.22 #9 · Pre-order: Sony FE 14mm f/1.8 GM ($1,598)
So what is the verdict? My 14/1.8 GM has not shipped yet. May though before the end of the week. Really won’t get to compare multiple copies or compare to the Sigma. So is it keeper worth its cost?
I really need the experts here to give me their recommendations on what to do. First time I will have a lens wider than 15mm (10mm on APS-C). So line up and give me your recommendations.
p.22 #10 · Pre-order: Sony FE 14mm f/1.8 GM ($1,598)
So what is the verdict? My 14/1.8 GM has not shipped yet. May though before the end of the week. Really won’t get to compare multiple copies or compare to the Sigma. So is it keeper worth its cost?
I really need the experts here to give me their recommendations on what to do. First time I will have a lens wider than 15mm (10mm on APS-C). So line up and give me your recommendations.
p.22 #11 · Pre-order: Sony FE 14mm f/1.8 GM ($1,598)
The test is only a comparison of a single condition, and a lenses with a strong field curvature can often achieve better results through focus shift at medium or smaller aperture in the real world. I will try to reproduce Bobu's test results in this way
Maximilian wrote:
Oh je, this is quite exactly the contrary of the conclusions to which Lloyd Chambres has come...
p.22 #12 · Pre-order: Sony FE 14mm f/1.8 GM ($1,598)
swldstn wrote:
So what is the verdict? My 14/1.8 GM has not shipped yet. May though before the end of the week. Really won’t get to compare multiple copies or compare to the Sigma. So is it keeper worth its cost?
I really need the experts here to give me their recommendations on what to do. First time I will have a lens wider than 15mm (10mm on APS-C). So line up and give me your recommendations.
I think the summary so far suggests that this was an ambitious lens design from Sony: the lenses we get often aren't the best ones that the manufacture's lens simulation software can churn out - because they would be too difficult to build precisely, so compromises are made. In the case of Sony's 14GM, it looks like they went for it (a bit of overconfidence creeping in maybe?), i.e. to build a lens that would need very high tolerances, the net result being we have a real product with above average sample variation in the corners; only Roger could help us with bombproof evidence for that.
p.22 #17 · Pre-order: Sony FE 14mm f/1.8 GM ($1,598)
j4nu wrote:
So is there a consensus yet on which filters are better, the thicker-but-closer-to-lens-Haida or thinner-but-closer-to-sensor-Kase?
I think the consensus is, that both are not great with this lens. I will try some thin filter foils next. Handling of these is absolutely terrible, but FC should be better. 150mm front filters are definitely no alternative for me.
p.22 #20 · Pre-order: Sony FE 14mm f/1.8 GM ($1,598)
j4nu wrote:
So is there a consensus yet on which filters are better, the thicker-but-closer-to-lens-Haida or thinner-but-closer-to-sensor-Kase?
Adding any kind of glass filters before CMOS can make performance obvious worse, so my personal suggestion is to choose you think is easy to operate.
I think Haida's advantages are cheap, easy to carry, easy to disassembly and assembly, so I am willing to tolerate its disadvantages, and I can't imagine changing clip-in camera filter in the wild with bare CMOS.
