p.15 #1 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread
j4nu wrote:
I'm really not trying to pick on the Sigma as I think it's an amazing and unique lens, with great bokeh for a zoom. I personally just don't believe it reaches the level of the best primes, when it comes to rendering smoothness. Of course, 35GM is also not the best at this, but then you can stop down and enjoy rounder bokeh balls ...
Anyways, here's a more "extreme" example:
Was that supposed to show the bokeh wasn't so great? Looks lovely to me, IDK.
I think when comparing it to the "best primes", it's probably good to remember this is an f/1.8 lens. Even so, I think it punches a bit above its weight.
p.15 #4 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread
highdesertmesa wrote:
Was that supposed to show the bokeh wasn't so great? Looks lovely to me, IDK.
I think when comparing it to the "best primes", it's probably good to remember this is an f/1.8 lens. Even so, I think it punches a bit above its weight.
Not really, only the first (comparison) one, where I intended to show that the bokeh balls get more distinct at 35mm...
Anyways, I think I've already said that's the best bokeh out of zooms I tried myself .
My point was more along the lines that if you expect the Sigma to beat 35/1.2DN or 50/1.2GM (in background rendering smoothness) then you might be disappointed a bit ...
p.15 #5 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread
John Straus wrote:
j4nu,
So as I was looking at the two super low sidewalk shots with the pup (Love that you got down that low!!) I was thinking "Thats some odd lens flare..." Then realized it was the leash
Haha, yes - my wife doesn't allow me to let the poor dog run free ...
p.15 #6 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread
Cross posted from the Sony FE Image Thread.
Autumn is probably my favorite time of the year, although it's been so hot and dry this summer, I doubt there will be much color. Even so, it's still a beautiful time of the year.
p.15 #9 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread
I just received my copy, my sample looks good at 35mm and 45mm, however at 28mm it looks slightly soft wide open at close distance, it is very sharp at long distance though.
And I can see the top center is also (very) slightly sharper than the middle center even at 35mm and 45mm. Is decentering can be visible at the top or bottom center of the image ?
Nov 01, 2024 at 12:23 PM
Steve Spencer Offline • • • • • • • Upload & Sell: Off
p.15 #10 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread
Keunish wrote:
I just received my copy, my sample looks good at 35mm and 45mm, however at 28mm it looks slightly soft wide open at close distance, it is very sharp at long distance though.
And I can see the top center is also (very) slightly sharper than the middle center even at 35mm and 45mm. Is decentering can be visible at the top or bottom center of the image ?
p.15 #11 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread
By an unexpected route, zooms such as this one (and an increasing number of others) will force a reappraisal of the design of upper middle prime lenses.
Mainstream prime lenses are soon going to have to offer greater appeal, individuality and, for want of a better word, character. They will need to be smaller and lighter, and use much better glass in fewer elements. People will want greater choice, different styles.
p.15 #12 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread
Keunish wrote:
I just received my copy, my sample looks good at 35mm and 45mm, however at 28mm it looks slightly soft wide open at close distance, it is very sharp at long distance though.
And I can see the top center is also (very) slightly sharper than the middle center even at 35mm and 45mm. Is decentering can be visible at the top or bottom center of the image ?
As Steve said, decentering can manifest itself in almost any direction. Think of how an element could be slightly tilted in any direction.
Might want to try Fred's decentering/tilt test, it works well.
p.15 #14 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread
tsdevine wrote:
As Steve said, decentering can manifest itself in almost any direction. Think of how an element could be slightly tilted in any direction.
Might want to try Fred's decentering/tilt test, it works well.
Thank you, the lens is very sharp at long distance and I can't see a real difference between the top center and middle center.
I only see a difference at short distance to medium distance (where by exemple my 35mm GM is much sharper at f1.4 than my 28-45mm at 28mm/f1.8). At F2 my 28-45mm lens sharpens a lot, and at f2.2 it becomes as good as my 35mm GM wide open. But I bought the Sigma it to use it wide open and after seeing some online reviews saying the 28-45mm is as sharp as the 35mm GM wide open, it is a bit disappointing.
The online shop offered to send me a new copy when they will receive the bad one. Do you think there is a higher chance to get another bad copy if all the lenses they have are coming from the same batch ?
p.15 #15 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread
Keunish wrote:
Thank you, the lens is very sharp at long distance and I can't see a real difference between the top center and middle center.
I only see a difference at short distance to medium distance (where by exemple my 35mm GM is much sharper at f1.4 than my 28-45mm at 28mm/f1.8). At F2 my 28-45mm lens sharpens a lot, and at f2.2 it becomes as good as my 35mm GM wide open. But I bought the Sigma it to use it wide open and after seeing some online reviews saying the 28-45mm is as sharp as the 35mm GM wide open, it is a bit disappointing.
The online shop offered to send me a new copy when they will receive the bad one. Do you think there is a higher chance to get another bad copy if all the lenses they have are coming from the same batch ?...Show more →
I can't really given guidance on the GM 35 comparison, I've never shot one. I find my 28-45 does well when I compare it to my CV 35 APO, I'm not sure I have spent the time and effort to test at various distances, etc. But my 28-45 is sharp wide open, but like most lenses, it does improve when stopping down.
Bryan's TDP comparison tool seems to imply it's in the ballpark of the GM 35 wide open, note you have to copy and paste the whole link, if you click on it, FM chops off part of the URL.
In terms of batches, I sort of doubt it. These lenses are complex enough, I don't think variation would come from a whole bunch of them having the same component out of spec, or assembled slightly improperly in the same way for a whole batch.
And sample variation isn't limited to a single lens model, you might have a better than average GM 35.
p.15 #16 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread
Keunish wrote:
Thank you, the lens is very sharp at long distance and I can't see a real difference between the top center and middle center.
I only see a difference at short distance to medium distance (where by exemple my 35mm GM is much sharper at f1.4 than my 28-45mm at 28mm/f1.8). At F2 my 28-45mm lens sharpens a lot, and at f2.2 it becomes as good as my 35mm GM wide open. But I bought the Sigma it to use it wide open and after seeing some online reviews saying the 28-45mm is as sharp as the 35mm GM wide open, it is a bit disappointing.
The online shop offered to send me a new copy when they will receive the bad one. Do you think there is a higher chance to get another bad copy if all the lenses they have are coming from the same batch ?...Show more →
If I can add to tsdevine's comments...
I haven't had time to compare my Sigma 28-45mm to my Sony 35mm GM, but I did do a comparison between my CV 35mm APO to the GM about two years ago. My 35GM is definitely better across the frame at f/1.4 compared to my CV35APO at f/2, not a lot, but it's a clear difference. I'm hoping I'll have a change to compare the Sony and the Sigma soon, but I'd also be surprised if the Sigma out performed the Sony GM.
p.15 #17 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread
Many factors are in play. It's the reason to be specific about methodology, focus distances, rationale for conclusions, etc. Then, copy variation, etc. Most believe the GM 35/1.4 and CV 35/2 are close to identical in performance. Some believe Sony cooks the books (RAWs) for at least some lenses, so RAW converters need to be detailed. It's messy. Below are the LensTip wide apertures for the GM and CV 35s.
p.15 #18 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread
Here's the 28-45 from Lenstip. The first is center, second is APS-C edge, and the last is the edge of full frame. So you have compare the first to the red dot in each chart above, the second to the blue, and the third to the green.
In this chart the red 28mm, the blue is 36mm and the green is 45mm.
p.15 #19 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread
I took many handheld shots with my Q2 and Sigma 28-45 @ 28 at close, mid and infinity distances. The two were different, but to my eye, nether was better than the other and I liked the Sigma color and bokeh more. The lack of a clear winner led me to sell the Q2, which I bought because I did not have a good 28 for Sony (I had the 28 1.4 E for Nikon and it was excellent).
I did a limited handheld test with Sigma against my 35 GM because I was not going to sell the GM, but I was curious. The GM was sharper at times (I was shooting handheld), but in the end, the Sigma held its own. I did not test the Sigma against my 50 GM.
The TLDR is I take the Sigma over 35 for the versatility (size and weight not an issue), unless I want smaller size and 1.4 of the GM and want to shoot a prime.
I enjoy using the Sigma, but in the end, these decisions are personal.
p.15 #20 · Sigma 28-45mm f/1.8 DG DN Art Prime Comparison / Image Thread
It's a pretty harmonious optical balance, great presence, high impact. They got the spherical aberration correction just about right, and that's no mean feat in such a lens. So it's very versatile and even stands up well to the zoomed in bokeh exam.
It delivers image depth I don't see in the GM 35/1.4, that one is more of a subject front-bokeh background kind of lens, which still suits many users. But we are used to seeing zooms as giving up ground to more 'specialist' prime lenses, not the other way round.
...
.
...
