p.1 #1 · NEX 7 - have Zeiss 21mm 2,8 but I want more. CV 15mm or Speed Booster ?
Considering the Speed Booster - my understanding is that if you want the very best out of it you have to tune the SB to get the least purple fringing and vignetting and that tuning is specific to a single lens.
p.1 #2 · NEX 7 - have Zeiss 21mm 2,8 but I want more. CV 15mm or Speed Booster ?
I recently got the Speed Booster but doesn't like it very much because I think my DSLR lenses are to large and doesn't balance well on my NEX 6 when doing handheld shooting and I am probably going to sell the Speed Booster. The CV 15 on the other hand is a very nice match for my NEX 6. You should be aware that the NEX 7 handles very wide M lenses worse than the NEX 6 from what I have read and that should also be factored into the decision.
p.1 #3 · NEX 7 - have Zeiss 21mm 2,8 but I want more. CV 15mm or Speed Booster ?
Don't bother with the voigtlander 15 . it produce bad vignetting and color shift on NEX-7, and you have to spent lot of time and effort to get rid of that(even with cornering, that means extra steps in your workflow and more noise)
p.1 #5 · NEX 7 - have Zeiss 21mm 2,8 but I want more. CV 15mm or Speed Booster ?
Or if you don't mind the size of the Zeiss 21, you could get the Samyang 14. Costs about the same as a Speedbooster, and i think you'll get better corners than the Cv15 or the SB+zeiss.
p.1 #6 · NEX 7 - have Zeiss 21mm 2,8 but I want more. CV 15mm or Speed Booster ?
I have the Nex 7 and the Voigtlander 15, the Sigma 10-20 and now the Sony 10-18/4. The Voigtlander can be made to work, so long as you use the Adobe Lightroom flat field plug in. The Sigma works ok, too, but I've found that it is difficult to focus. When you nail it, though, it is very sharp.
The Sony is sharp, has OS, Autofocus..... Is now in my bag every tome I go out.
p.1 #8 · NEX 7 - have Zeiss 21mm 2,8 but I want more. CV 15mm or Speed Booster ?
The chief ray angles are too acute with these UWA 'M' mount lenses for the NEX not to avoid the color fringing and corner sharpness deficiencies. For anything wider than 28mm (some may argue 35mm to completely avoid these issues), sticking with the native-mount lenses may be a better bet. Check Lloyd Chambers subcription site where he notes, "the chief ray angle is the primary determinant of color shading and off-center sharpness with M-mount lenses on the Sony NEX-7....
BTW, on the Metabones website Q&A section, there's the following:
Q: I want to use my Leica M, Contax G, Contax rangefinder and Nikon rangefinder lenses on Speed Booster™!!!
A: Sorry folks, but there is not enough room for the optics. An SLR lens is required, such as Leica R or Contax C/Y. Rangefinder lenses won't work.
p.1 #9 · NEX 7 - have Zeiss 21mm 2,8 but I want more. CV 15mm or Speed Booster ?
j.liam wrote:
The ray angles are too acute with these UWA 'M' mount lenses for the NEX not to avoid the color fringing and such. For anything wider than 28mm (some may argue 35mm to completely avoid these issues), sticking with the native-mount lenses may be a better bet. Check Lloyd Chambers subcription site where he notes, "the chief ray angle is the primary determinant of color shading and off-center sharpness with M-mount lenses on the Sony NEX-7....
From what I've read here, it's just the NEX-7 that has these problems, so I think your statement is a bit too general. People here have been using the CV 15 and lenses like the Contax Biogon 28/2.8 with very good results on the NEX-5N and the NEX-6 seems to perform almost as good.
p.1 #11 · NEX 7 - have Zeiss 21mm 2,8 but I want more. CV 15mm or Speed Booster ?
My wife carries a NEX5 with the kit lens and I was able to get that same shot (a better moon) in landscape but the edges really suffer when compared to the Distagon.
But as often discovered - it's not without a tradeoff - both Sigmas cast a pink hue that is difficult to clean in post - its sometimes up and sometimes down but using a custom WB in the field prevents it. But I've done that and forgotten to reset back to auto WB later and really end up with some crap.
p.1 #12 · NEX 7 - have Zeiss 21mm 2,8 but I want more. CV 15mm or Speed Booster ?
A good copy of the lowly Sony 16/2.8 is arguably better, faster & cheaper than the CV15/4.5 outside of the very extreme corners. I had one (borrowed) for a while with my NEX-7 and was extremely impressed at the performance, it's reputation is far worse than the performance (which was better than a good OM 24/2.8 on FF). The 10-18 is better of course but for a 24mm-e it really is hard to beat the 16/2.8 if you are willing to return a bad copy for replacement.
p.1 #13 · NEX 7 - have Zeiss 21mm 2,8 but I want more. CV 15mm or Speed Booster ?
My Leica Elmarit M 28/2.8 version II has very good corners and almost zero color shift, I've not used cornerfix on any shots yet.
My CV15 does color shift on my 7 fairly strong that I don't really use it right now, and getting a good profile is challenging because of the huge DOF shows detail in whatever you use to make the profile.
But on the 5N/R & 6 it's awesome, just check some of the shots in the NEX image thread.
The new Zeiss 12 sounds like it may be perfect for the 7.
p.1 #14 · NEX 7 - have Zeiss 21mm 2,8 but I want more. CV 15mm or Speed Booster ?
I'm very willing to do that. Sad thing is the camera shops are equally willing to sell the crap off to the next customer that doesn't know any better. It would be better if they went back for QC to the manufacturer.
p.1 #15 · NEX 7 - have Zeiss 21mm 2,8 but I want more. CV 15mm or Speed Booster ?
Max, I tried 4 Sony 16s, and returned each one, and, beleive me, I was not that picky. OTOH, I am beginning to see really nice images from the Touit 12mm. When is your trip?
p.1 #19 · NEX 7 - have Zeiss 21mm 2,8 but I want more. CV 15mm or Speed Booster ?
I went to look at the Touit's MTF but they aren't on the data sheets at Zeiss Support Downloads. In other news --- the Sigma guys redraw their MTF charts on some lenses so buyers need to look closely.
p.1 #20 · NEX 7 - have Zeiss 21mm 2,8 but I want more. CV 15mm or Speed Booster ?
Interesting Max - interesting but not surprising.
j.liam, thanks for saving me reading the large number of Speedincreaser pages, all one needs to know in one pithy sentence, and from the horse's mouth.
'The new Zeiss 12 sounds like it may be perfect for the 7.'
It's looking that way. Sensor, meet lens. I bet the 12mm has moderate barrel only. APS-C suddenly looks attractive.
