carstenw wrote:
Well, from Digital Single-Lens Reflex to Digital Single-Lens Camera, a generalisation. DSLM would also work, for Digital Single-Lens Mirrorless.
I believe CSC (compact system camera) has been adopted quite widely as a term for mirrorless cameras such as MFT, NEX, Fuji X, Samsung NX etc. I guess the A7/r falls into the same category since it is pretty damn compact.
Btw, pretty much every single digital camera other than some specialized 3D cameras perhaps are "single-lens", so the "DSL" part is assumed and therefore redundant, IMO.
carstenw wrote:
Thanks for the report; I would be interested in seeing a wide open shot with some sky or something where the cast can be seen, and something where the smearing can be seen.
uhoh7, the photos you just posted of your Elmarit 28 v3 shots show a similar magenta shift to what I saw. Seems to be some minor smearing, though I don't know the apertures used (probably 5.6 or 8 based on shutter and ISO and scene), nor how this lens would look on a Leica. If it's the best RF 28 on the A7R then I might have to move to a longer focal length.
Speaking of which, it'd be great to have a list of 35mm RF lenses that are smearing and color shift free.
I think the centers are so far beyond the M240, but on the edge it's closer, and maybe the 240 even has the edge at 2% of the side: I don't see it, but it's certainly possible, and we know it's the case at wider apertures with many wides.
Everyone can make up their own mind. I want RF for size. And I would like the best I can get.
uhoh7 wrote:
Everyone can make up their own mind. I want RF for size. And I would like the best I can get.
I'm even easier, I just want some snow. Colorado/Utah? I'm in the Sierra and its bad, really bad. And yes, I just reached the most off topic post of over a hundred pages. Thank you.
Charlie, call me ridiculous, but that snow shot does show magenta sides IMHO. If it were mine, I'd CornerFix it. Which doesn't invalidate using the lens of course...
philber wrote:
Charlie, call me ridiculous, but that snow shot does show magenta sides IMHO. If it were mine, I'd CornerFix it. Which doesn't invalidate using the lens of course...
I would say you are ridiculous if you don't care That is really bad. but that is really the worst scenario that having white snow in corner.
p.134 #10 · A7/A7r - performance with WA RF lenses
That's better than my NEX-7 + Elmarit M 28 ver2 and I am quite happy with it, so this should be fine for 80% of my shots with the lens, the other 20% I can cornerfix.
p.134 #12 · A7/A7r - performance with WA RF lenses
Everyone can make up their own mind.
Yep, that is pretty strong magenta shift. Everyone can make up their own mind whether they can put up with it or not, but there's no denying it's there.
p.134 #13 · A7/A7r - performance with WA RF lenses
carstenw wrote:
Well, from Digital Single-Lens Reflex to Digital Single-Lens Camera, a generalisation. DSLM would also work, for Digital Single-Lens Mirrorless.
I much prefer EVIL cameras: Electronic Viewfinder, Interchangeable Lens.
p.134 #14 · A7/A7r - performance with WA RF lenses
uhoh7 wrote:
I think the bar here with some is getting...it's not getting, it has been all along, utterly ridiculous.
The bar definitely varies person to person. I'm looking for good performance wide open from a 28-35 focal length. While this picture is utterly terrible (new york sidewalk - gum, dirt, etc.) you can easily see that the 28 Elmarit-M v3 at f2.8 has a lot of edge smearing. I'm personally not looking to shoot landscapes at f8 with this lens. I'm looking for a standard-wide walk around for available light street scenes and need to be able to comfortably shoot at f2.8 and f4 without requiring a lot of fixing. I'm hoping the CV 35 1.4 might meet that requirement.
uhoh7, do you have any wide aperture CV 35 1.4 shots that you could share? Thanks.
p.134 #15 · A7/A7r - performance with WA RF lenses
Hi Matt,
Playing with the ZM 25 today, I discovered that the normally well behaved "clinical" lens suffers from substantial U shaped field curvature on the A7, even at close distances where the focusing group is actually further away from the sensor.
Since the field curvature is U shaped, focusing with the frame center and recomposing is a big NO as you can see in the below examples.
The first shot is focused in the center using magnified view then reframed. The second shot is focused by scrolling the magnified frame to the subject position without recomposing. The good news is that this will give perfect sharpness wide open at least at this close range.
I normally focus and recompose, a habit from shooting rangefinders, and also because it's quicker. But I realize that I have to move the magnified frame which takes 2-3 more seconds. This can be negligible or a big issue depending on the subject.
My neck of the woods is not blessed with good lens/camera testing conditions for a couple more days, a mix of fog and rain, can't get much worse than that! I did fire off some shots in my house at around 3 meters last night. My CV35/1.2 v.2 is the best of the bunch across the frame. Both the ZM25/2.8 and ZM35/2.8 needed stopping down to f/11 to get crisp corners, but were of course very good across much of the frame at larger apertures. The CV15/4.5 does indeed have bigtime vignetting! I'll need to work with that one outdoors to see if it is salvageable or will go on sale, but it's severe enough that you almost need to overexpose the center to get enough exposure of the edges and corners. Time to download the new Lightroom release candidate so I can mess with the RAWs, and finally learn to use the flat field plug-in.
I briefly loaded up the 100/2 Makro-Planar, and boy was it nice to nail focus wide open every... single... time It looks like these cameras will be great for some RF glass in some circumstances, but will really shine with well-chosen SLR lenses and the native glass released in the future.
p.134 #16 · A7/A7r - performance with WA RF lenses
zhangyue wrote:
I would say you are ridiculous if you don't care That is really bad. but that is really the worst scenario that having white snow in corner.
Yep - that is indeed terrible. Mind you, some have very low standards for acceptable image quality....
p.134 #17 · A7/A7r - performance with WA RF lenses
My take after shooting for a couple days, if anyone cares
For landscape usage, if you want to use RF wide glass, it appears that just about everything that I have access to requires drastic stopping down in order to get quality performance across the frame. The A7R actually deals with that pretty well, so if you are ok dealing with color cast, and are a tripod user that wants a small setup, its not too bad. That said, at f/11 I see pretty much zero difference between a stellar lens (such as the elmar 24) and an okay lens (such as the voigtlander 28/2). This isnt surprising of course. It just calls into question the need for a hyper expensive lens vs a very standard priced one.
Frankly I see very little difference between them wide open and close for people either, but thats another thread. I did see a difference on the NEX7, so maybe its just pixel pitch.
p.134 #18 · A7/A7r - performance with WA RF lenses
I've had my A7 for a few days and my A7r arrives today. I was hoping to do some side-by-side shoot-outs, but my Metabones (!) M to E adapter is asymmetric. I was hoping to order another but they're out stock everywhere (darn it, am I not the only one who just got an A7/r? lol), so I gotta pony up for the Voigtlander that costs twice as much.
p.134 #19 · A7/A7r - performance with WA RF lenses
Thanks so much for the example Edward. So it looks like the lovely lady's shirt is in focus on the first image, so I assume that means the U-shaped curvature moves away as the subject is further from the center, right? I'll have to look at my infinity shots I took yesterday to see if that's happening at distance as well. I guess I'll just have to get used to moving that little box around, or get better at using peaking on the non-magnified view. I did try activating zebra and nearly had a seizure, that one will require more experimentation as well
edwardkaraa wrote:
Hi Matt,
Playing with the ZM 25 today, I discovered that the normally well behaved "clinical" lens suffers from substantial U shaped field curvature on the A7, even at close distances where the focusing group is actually further away from the sensor.
Since the field curvature is U shaped, focusing with the frame center and recomposing is a big NO as you can see in the below examples.
The first shot is focused in the center using magnified view then reframed. The second shot is focused by scrolling the magnified frame to the subject position without recomposing. The good news is that this will give perfect sharpness wide open at least at this close range.
I normally focus and recompose, a habit from shooting rangefinders, and also because it's quicker. But I realize that I have to move the magnified frame which takes 2-3 more seconds. This can be negligible or a big issue depending on the subject....Show more →
p.134 #20 · A7/A7r - performance with WA RF lenses
You're welcome! That is true for infinity as well. In order to get corners in sharper focus, you have to focus closer, which reduces center sharpness. A certain compromise has to be found depending on the scene and aperture.
uscmatt99 wrote:
Thanks so much for the example Edward. So it looks like the lovely lady's shirt is in focus on the first image, so I assume that means the U-shaped curvature moves away as the subject is further from the center, right? I'll have to look at my infinity shots I took yesterday to see if that's happening at distance as well. I guess I'll just have to get used to moving that little box around, or get better at using peaking on the non-magnified view. I did try activating zebra and nearly had a seizure, that one will require more experimentation as well
That is really bad. but that is really the worst scenario that having white snow in corner. 
