Since there is absolutely no information on Viltrox's website regarding any functionality with their adapters, it's safe to assume that you can't assume anything, plus there is nothing at all useful in the reviews on B&H's site for this adapter. This is pretty much the polar opposite of what you'll find on Fringer's site. What was it about the Viltrox that drew you to it. It seems by general consensus that Fringer is indeed the gold standard at the moment, but don't know the specific answer to your question. You might be able to infer that, because on the 100s camera, the Fringer will let you choose between lens IS and camera IS but not both, that that function would likely work - the lens IS with that adapter. There's one real way to find out and you know what that is.
Stick with Kipon/TechArt if you can't spend the bucks for Fringer. Personally AF with GFX50s bodies is going to be slow and inconsistent. Not an issue if you shooting non moving things.
I did some more testing with the Canon 11-24 on the 100s in the studio today and what I came up with was that it's very good from 15mm to 21mm. It vignettes if you're wider or longer than those numbers, but with careful focusing, at f/11, it's very sharp all the way into the corners. Actually it covers at 14mm but the extreme corners are wanting a bit. If there was any curvature of field, I didn't really see it and to have a zoom even with a six mm zoom range that works as well as it does is amazing.
Peter Figen wrote:
I did some more testing with the Canon 11-24 on the 100s in the studio today and what I came up with was that it's very good from 15mm to 21mm. It vignettes if you're wider or longer than those numbers, but with careful focusing, at f/11, it's very sharp all the way into the corners. Actually it covers at 14mm but the extreme corners are wanting a bit. If there was any curvature of field, I didn't really see it and to have a zoom even with a six mm zoom range that works as well as it does is amazing....Show more →
Field curvature can and often does vary by focus distance. I assume in the studio you were at close focus distances, but if you take it out for landscapes or other purposes in which objects far away that you want to be in focus it is a lot more likely that you will see field curvature.
Steve - Do you actually own one of these lenses or is this just what you're reading. I was shooting my studio which is about 30x30x18' tall and saw no evidence of major or even minor curvature, so I went outside and shot some street scenes and purposely focused in different areas to see how that would affect the images and still, not really any apparent issues with field curvature, not that that means there's none, only that I can't see it affecting me using this lens in situations where it's warranted. Now, to be honest, I too have read from other users that field curvature is an issue with this lens, but even from the moment I got it, what, about six or seven years ago (when did it come out?) I've just never seen it, and I certainly tried, so I just figured they all either got bum copies just didn't know how to focus, which is much more common and serious disease than is commonly known.
bobby350z wrote:
Stick with Kipon/TechArt if you can't spend the bucks for Fringer. Personally AF with GFX50s bodies is going to be slow and inconsistent. Not an issue if you shooting non moving things.
im moving to medium format as im never shooting moving things.never use bracketing mode.even afs mode no need. mf or single af enought for all im need.
Peter Figen wrote:
Steve - Do you actually own one of these lenses or is this just what you're reading. I was shooting my studio which is about 30x30x18' tall and saw no evidence of major or even minor curvature, so I went outside and shot some street scenes and purposely focused in different areas to see how that would affect the images and still, not really any apparent issues with field curvature, not that that means there's none, only that I can't see it affecting me using this lens in situations where it's warranted. Now, to be honest, I too have read from other users that field curvature is an issue with this lens, but even from the moment I got it, what, about six or seven years ago (when did it come out?) I've just never seen it, and I certainly tried, so I just figured they all either got bum copies just didn't know how to focus, which is much more common and serious disease than is commonly known....Show more →
I don't have the lens, but earlier in this thread I think I remember somebody posting quite a few pictures that documented the field curvature of the lens. I don't know if those picts are still available or where in the thread they are now. There are techniques for making the field curvature a lot easier to see.
The sensor stack (i.e., glass light passes through before hitting the sensor) for the GFX cameras is quite a bit thicker than DSLRs and mirrorless FF 35mm cameras, so field curvature is expected with most DSLR lenses, but it doesn't show up with all such lenses. The slower aperture of the 11-24 and what is likely a long exit pupil probably help with this lens making it less likely to show problems. Still it would not be surprising if it did, and the pictures from earlier in the thread suggest there were at least some problems with the earlier lens tested, but as always with zooms there is more variance from copy to copy than in primes (the relative complexity of zooms makes variance in performance more likely), so perhaps your copy and the copy tested earlier don't show similar results. Thanks for reporting your results here.
Peter Figen wrote:
I did some more testing with the Canon 11-24 on the 100s in the studio today and what I came up with was that it's very good from 15mm to 21mm. It vignettes if you're wider or longer than those numbers, but with careful focusing, at f/11, it's very sharp all the way into the corners. Actually it covers at 14mm but the extreme corners are wanting a bit. If there was any curvature of field, I didn't really see it and to have a zoom even with a six mm zoom range that works as well as it does is amazing....Show more →
Your post prompted me to take my 11-24 outside and shoot 11, 14, 15, 20, 21 and 24, for f/4. 5.6, 8, 11, and 16. My results are close to yours, on mine 15-20 at f/11 produces nice corners but corners begin to darken at 21mm. I was wowed by the 16mm shot. The rest of the results vignette to some degree.
My 40 2.8 (100s and fringer adapter) noticeably darkens a corner at lower f stops but clear up at f/11. I haven't evaluated focus nor tried stacking yet. My gut feel is that you can get decent images from it but you'll have to be aware of it's limitations.
Note that the video used f/13 and SS of 60.
EDIT: I'm going to try another set with the 40 below f/11, as I suspect it'll perform better, my first shots were not framed well. I'll up date results here. Also going to try the 85 1.2, and a native GF 30.
UPDATE: On the 40, I'm seeing darkening at f/4 and below, but was surprised to see decent corners at 5.6 and 8. I don't get in to nitty-gritty optical testing but did a comparison between the 40 2.8 and the GF30 at f/8 in good light. IMO the 40 is a very cost effective substitute for a native lens.
DES-1 wrote:
Your post prompted me to take my 11-24 outside and shoot 11, 14, 15, 20, 21 and 24, for f/4. 5.6, 8, 11, and 16. My results are close to yours, on mine 15-20 at f/11 produces nice corners but corners begin to darken at 21mm. I was wowed by the 16mm shot. The rest of the results vignette to some degree.
Yep. That perfectly echoes what I saw. And one of the confusing aspects of looking at the corners when the effective focal length is so wide is that there is so much physical distortion that can easily be mistaken for something else. It's not really that often that you'd need or even want to shoot that wide but it's good to know that even with a very limited zoom range, there is an effective tool. I would not recommend someone going out and buying this lens just for the Fuji, but if you already have one, all you need is the adapter.
And there was that guy in Germany, who for awhile offered both a tllt-shift adapter and a vastly overpriced and ultimately unusable mounting yoke for the Canon t/s lenses, also offered a surgically altered version of the Canon 11-24 where the built-in lens shade, which is the source of most of the vignetting, is excised off and an internal baffle removed that also constricted the image circle. Those alterations were made in order to make it an effective tilt-shift lens for the 35mm format but would likely be just as effective for medium format use. Of course, who wants that big bulbous snout hanging out with nothing at all to protect it, but those early Nikkor fisheyes were like that too.
Peter Figen wrote:
Steve - Do you actually own one of these lenses or is this just what you're reading. I was shooting my studio which is about 30x30x18' tall and saw no evidence of major or even minor curvature, so I went outside and shot some street scenes and purposely focused in different areas to see how that would affect the images and still, not really any apparent issues with field curvature, not that that means there's none, only that I can't see it affecting me using this lens in situations where it's warranted. Now, to be honest, I too have read from other users that field curvature is an issue with this lens, but even from the moment I got it, what, about six or seven years ago (when did it come out?) I've just never seen it, and I certainly tried, so I just figured they all either got bum copies just didn't know how to focus, which is much more common and serious disease than is commonly known....Show more →
It's easy enough to do a quick test for field curvature.
DES-1 wrote:
What adapter are you using? Don't think copy variance is at play. To me, wide open looks unsatisfactory.
It even has vignetting wide open on the native 35mm sensor, so not sure what they're talking about saying no vignetting wide open on 44x33. "Correctable vignetting", perhaps.
I have to wonder how many people have their GFX 35mm mode set to "Auto" and are shooting with electronic adapters in crop mode.
