junglialoh wrote:
I do not see distortion so far. For Leica L side, no need to seek further.
I am very happy with Sigma L series lenses.
There will be no visible distortion/LACA for Leica, Panasonic and Sigma L-mount shooters since this is automatically corrected in LR and C1. That does not mean the lens performs any better on the Leica L side, it's just that the distortion and color error are fixed when importing images.
There is corner sharpness degradation after correction but it's still very good.
Sigma 24mm f/2 DG DN: After (top) and before (bottom) correction
Does anyone have experience with both Batis 25 and Sigma 24i? I am thinking about whether Sigma 24 will be an upgrade. Batis 25, albeit having great color rendering, is a bit soft wide open (still usable for me on an 42 mp sensor). What really makes me want to upgrade is Batis 25's very bad CA and strong onion rings bokeh, both can be quite unpleasing when show up. I am wondering whether replacing it with Sigma 24i will be a worthy choice.
FJR1 wrote:
Just a note that Adobe Camera Raw's latest version now includes profiles for both the Sigma 90mm F2.8 DG DN and the 24mm F2 DG DN.
Any idea what the ACR profile does over and above the "built-in" profile that gets automatically applied when opened in ACR (and you can't not apply it)?
evaeva0705 wrote:
Does anyone have experience with both Batis 25 and Sigma 24i? I am thinking about whether Sigma 24 will be an upgrade. Batis 25, albeit having great color rendering, is a bit soft wide open (still usable for me on an 42 mp sensor). What really makes me want to upgrade is Batis 25's very bad CA and strong onion rings bokeh, both can be quite unpleasing when show up. I am wondering whether replacing it with Sigma 24i will be a worthy choice.
I own the Batis, but not the Sigma, however, if you intend to shoot more shallow depth of field shots, the Sigma will give you smoother rendering, with less LOCA (from what I've seen in samples). Stopped down, sharpness is similar, but to my eye, the Batis has better colours, and better deep DOF 3D.
jhinkey wrote:
Any idea what the ACR profile does over and above the "built-in" profile that gets automatically applied when opened in ACR (and you can't not apply it)?
- J
I believe it's the same correction. I'm just a hobbyist, so quick corrections are not an issue for me. I shoot in raw format and always make corrections after the photo is in Photoshop/Lightroom.
evaeva0705 wrote:
Does anyone have experience with both Batis 25 and Sigma 24i? I am thinking about whether Sigma 24 will be an upgrade. Batis 25, albeit having great color rendering, is a bit soft wide open (still usable for me on an 42 mp sensor). What really makes me want to upgrade is Batis 25's very bad CA and strong onion rings bokeh, both can be quite unpleasing when show up. I am wondering whether replacing it with Sigma 24i will be a worthy choice.
No direct comparison, but I think the Sigma 24/2 is sharper, and it wins in every other department, handling and haptics are way better than the Batis 25/2. At 365 grams the Sigma is slightly heavier than the Batis, but it takes 62mm instead of 67mm filters, and there’s a metal aperture ring and metal focusing ring! The aperture ring is Leica R level feel.
Particularly wide open the Sigma 24/2 performs better than the Zeiss Batis 25/2 in regard to both sharpness and LoCA. The Sigma 24/2 appears to have a reserve of sharpness great enough that I find the distortion unproblematic.
The Sigma 24/2 has got more distortion, about 5% according to lenstip eye-balling it. They,ve not completed a formal test of the Sigma 24/2 yet. On the other hand the Batis 25/2 has the moustache kind of distortion, that is more complex to fix.
If you can live with f/3.5 max aperture, the 24/3.5 is also a great option with only about 1.5% distortion, which is very good for a wide angle.
Petegh wrote:
I own the Batis, but not the Sigma, however, if you intend to shoot more shallow depth of field shots, the Sigma will give you smoother rendering, with less LOCA (from what I've seen in samples). Stopped down, sharpness is similar, but to my eye, the Batis has better colours, and better deep DOF 3D.
Also, forgot to mention that the Batis is fully weather sealed, has superior flare resistance, has a very flat field, and the distortion, whilst it is slightly moustache, is so minor that it doesn't require correction for most landscape shots - hence preserving micro-contrast.
The Bats also has an OLED DOF scale, which isn't super accurate, but when you get adjusted to it, is still useful for hyperfocal focussing.
Oh, and the Batis only has about half the breathing that the Loxia 25mm has, so better for focus stacks (not sure how the Sigma performs in that regard)
Fred Miranda wrote:
Today I tried the Sigma USB Dock to tweak focus with a couple DG DN lenses in L-mount and it worked great.
By default focus throw is set to 'Long' and that's why it takes a lot of rotation to nail focus with I series DG DN primes.
Aside from letting you update the lens firmware, which I believe can be done without it, the dock allows one to tweak focus throw from Long to Standard or Short.
I set the 24/3.5 and 45/2.8 to "short" and it works so much better now.
Sigma should offer Sigma USB Dock compatibility to the DG DN E-mount lenses as well. This is a game changer for those who enjoy manual focusing....Show more →
Arty73 wrote:
Due to the long focus throw on my e mount A7III it is difficult to estimate which way I should turn to focus, is this different if the lens software is adjusted to "short"?
Fred:
Changing the setting from long to "short" was a game changer for me as I am actually enjoying manual focusing the Series I lenses now. It's easier to focus for sure on the 24 and 35i lenses. Problem is that this can't be tweaked for the Sony, since the dock is not compatible with the E-mount version lenses for whatever reason.
Arty73:
Recently contacted Sigma Japan about the manual settings of the I series lenses, the question was whether the e mount lenses can also be adjusted to short focus throws instead of just long ones. Sigma's response:
Sigma
Your question and request are perfectly understandable. However, at this point, we don't have a clear plan/schedule to develop a software that can control the focus throw of our Sony E-mount lenses.
We would also need the Sony E-mount version of USB Dock to tweak the focus throw. However, at this point, we are not planning to make that.
But, I agree. This feature would be very useful for a lot of Sony users. At least, I will forward your message to our Product Planning Department, and they will study the possibilities.
We are so sorry we cannot be of any help to you on this matter. We would appreciate your understanding on it.
Arty73
Thank you very much for your response.
We are sorry to hear that it is not possible to adapt to Sony cameras. I've been thinking about the following, would it be possible to swap the lens mount from the sony with a lens mount from an L mount and then adjust the software in the lens via a dock and then mount the sony E mount again?
Sigma
Would it be possible to swap the lens mount from the sony with a lens mount from an L mount and then adjust the software in the lens via a dock and then mount the sony E mount again?
Unfortunately, this is not possible. If you convert the mount of the L-mount lens to Sony E-mount, the focus throw setting of the lens is cancelled and invalidated. This is because "the focus throw setting" feature is only for L-mount lenses, not for Sony E-mount. The setting cannot exist in Sony E-mount lenses.
Oké, Unfortunately for now, but I am happy with Sigma's explanation, clear and transparent.
crosspost: Sigma I Series Image Thread (E-mount and L-mount)
Fred Miranda wrote:
There will be no visible distortion/LACA for Leica, Panasonic and Sigma L-mount shooters since this is automatically corrected in LR and C1. That does not mean the lens performs any better on the Leica L side, it's just that the distortion and color error are fixed when importing images.
There is corner sharpness degradation after correction but it's still very good.
Hi Fred, (@Fred Miranda) I received my copy of Sigma 90. I love it for its IQ and size. However, AF/MF seems not working for this lens or this copy on SL2S. I couldnt get lens to enter MF mode with SL2S no matter what I do. the MF is grey out no matter you put lens in AF or MF mode. and My lens seems always in AF mode that shutter button always engage AF. My Sigma 45 works fine so that eliminate my camera issue.
zhangyue wrote:
Hi Fred, (@Fred Miranda) I received my copy of Sigma 90. I love it for its IQ and size. However, AF/MF seems not working for this lens or this copy on SL2S. I couldnt get lens to enter MF mode with SL2S no matter what I do. the MF is grey out no matter you put lens in AF or MF mode. and My lens seems always in AF mode that shutter button always engage AF. My Sigma 45 works fine so that eliminate my camera issue.
Do you have this issue?
With the Sigma 90/2.8 L-mount on the SL2 body, if I select MF on the lens, the camera enters MF mode -- meaning, half-pressing the shutter button does not engage AF. With this setting, the camera's "Focus Mode" is not accessible.
If I change the lens switch to "AF", "Focus Mode" becomes accessible and lets me choose iAF, AFc or AFs. (MF is grayed out)
I'm not experiencing what you described. It works the same as my 45/2.8i. MF needs to be set on the lens.
I appreciate your reply. Looks like I have a faulty lens.
I will exchange another one. I really like it though.
Fred Miranda wrote:
With the Sigma 90/2.8 L-mount on the SL2 body, if I select MF on the lens, the camera enters MF mode -- meaning, half-pressing the shutter button does not engage AF. With this setting, the camera's "Focus Mode" is not accessible.
If I change the lens switch to "AF", "Focus Mode" becomes accessible and lets me choose iAF, AFc or AFs. (MF is grayed out)
I'm not experiencing what you described. It works the same as my 45/2.8i. MF needs to be set on the lens.
Very nice review. In additional to AF/MF switch issue, My first copy is also decentered. This is first decenter copy of sigma lens I bought new in past few years. (Out of 5 bought)
zhangyue wrote:
Very nice review. In additional to AF/MF switch issue, My first copy is also decentered. This is first decenter copy of sigma lens I bought new in past few years. (Out of 5 bought)
What suprised me the most is the (lack of) difference in bokeh compared to FE85. I'd expect Sigma to come up with a nice "rendering" lens here, as they already have a super sharp (though a lot bigger and more expensive) 85 DN.
As I mentioned earlier in this thread after saw early samples. Mid-tele at f2.8 will behave similar. I am not too concerned about it as lens at this focal usually perform good in bokeh.
Size, weight and feature(Af/MF, aperture) are the selling point for me.
j4nu wrote:
What suprised me the most is the (lack of) difference in bokeh compared to FE85. I'd expect Sigma to come up with a nice "rendering" lens here, as they already have a super sharp (though a lot bigger and more expensive) 85 DN.
j4nu wrote:
What suprised me the most is the (lack of) difference in bokeh compared to FE85. I'd expect Sigma to come up with a nice "rendering" lens here, as they already have a super sharp (though a lot bigger and more expensive) 85 DN.
There are slight differences in rendering, but it appears to be marginal.
I wonder where the Sony 85mm F1.8 got the reputation to have mediocre rendering. I've used that lens quite a bit but none of the photos showed distracting / repulsive bokeh.
I will extend the review once I have more findings
Very nice review! Were the tests and results from the decentered copy? Or you were able to get a centered copy. My loan copy also has some tilt and swing.
The aperture ring is Leica R level feel. 
