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Success! The campaign ends at 9PM on Sunday. how well things like hilighting and dictionary lookup work) and a look at book availability and the ecosystems around the devices.
But this is only for Prime members. look at sample variation,8 Touit . A Few Subjective Observations
First I always try to say what my point of view is when I start a post because I know it influences my opinions to some degree I’ve made no secret I consider the NEX system to be one of great cameras with generally poor lenses
Before shooting with them I was much more excited about the 12mm Touit than the 32mm simply because there was not a good wide-angle prime at any price for the NEX After shooting with them I found the 12mm had fairly blurry corners wide open on theNEX-7 It may be better on theNEX-6but I didn’t shoot it on that camera
For this test I looked at theTouit 32mm f/18 partly because I liked it better partly because theSony 35mm f/18 OSSprovides a good comparison point I consider the Sony 35mm to be a good but not great lens (although it’s one of the better NEX lenses) It’s reasonably sharp wide open becoming quite sharp around f/28 I like the OSS and price is excellent
The Sigma30mm f/28 E-mount lensprovides a third option in this approximate focal length It doesn’t have as wide an aperture but it is does have an amazingly low price tag
Just shooting around with the 32mm Touit I was impressed particularly by center sharpness and particularly stopped down just a bit I also loved the close focusing distance (12 feet minimum) that let’s it almost be used as a pseudomacro with a 1:9 maximum magnification Wide open I wasn’t blown away by it but stopped down it was awesome
Close up the 32mm Touit is wonderfully sharp Even viewed as a 100% pixel-peeping crop
Imatest Results
I want to point out that these results are from a single copy of the 32mm f/18 Touit not my usual multiple copies because we don’t have stock yet just the one loaner copy Zeiss was kind enough to provide us I see nothing that makes me think this copy is out of sorts but until we test multiple copies we don’t know that this one is representative
I compared it to a group of 5 copies of the Sony 35mm f/18 OSS lens (since we hadn’t tested that one before I thought it best to go ahead and get reliable results now) The Sony 35 had an interesting sample variation: all copies had a slightly soft corner Just one corner Not the same corner But always one It wasn’t awful by any means but MTF values in 1 corner were always 20% lower than the other 3 corners
We’ll start with the MTF50 graphs for the Sony 35mm f/28 OSS which as I mentioned is a pretty good lens The Sony starts out pretty well for a wide aperture lens with center resolution of 790 Line Pairs / Image Height in the center and 595 average at f/18 on the NEX-7 At f/28 the lens sharpens dramatically with MTF50 of 1030 in the center and 805 average This is slightly better than the Sigma 30mm f/28 which has an MTF50 of 985 center and 805 average at f/28 increasing to 1040 / 840 at f/4
Imatest results for the Zeiss Touit 32mm were even better At f/18 the results were similar to the Sony 35mm with MTF50 of 800 in the center and 630 average The Touit sharpens up more quickly though having MTF50 results at f/22 (1190 center 830 average) that are much better than the Sony AT f/28 through f/56 the Touit has significantly higher MTF50 than the Sony I had mentioned online that wide open I thought the Sony and Touit were fairly similar but that stopped down just a bit the Touit was clearly resolving more These numbers support that
I should mention also that the Sony lens even on the NEX-7 does not reach maximum resolution until f/56 while the Touit maxes out at f/4 The Sony exhibited less distortion with 05% barrel distortion compared to 21% for the Touit in our tests
It has been stated the 32mm also has a lot of field curvature but we didn’t see this in our testing Corner sharpness was not improved greatly by corner specific focusing Our tests were done at about 13 feet shooting distance Things may be different at other shooting distances
Conclusion
This is a great example I think of why test numbers are just one thing to consider in choosing a lens According to the test results if you want the best bargain and shoot at f/28 or smaller the Sigma 30mm f/28 for $200 is just about impossible to beat
The Sony 35mm OSS gives you slightly better performance optically a wider aperture and image stabilization for $449 At f/18 it’s pretty equal to the Touit in resolution and has less distortion
Stopped down just a bit to f/22 though the Touit gives much better optical performance than any of the other lenses – numerically and by the eye test Worth $900 To some people certainly To others not at all
For me taking actual pictures with it confirmed what the numbers suggested The center resolution is probably the best I’ve seen from any lens on an NEX camera That’s enough to make it a future purchase for me
Roger Cicala
Lensrentalscom
May 2013 Posted in Equipment New Items Technical Discussions Resolution Tests Tweet even after 2 years of use.
The Jurek Essential’s water-resistant pocket (left) and stretchable mesh pocket (right). Expect most Macs introduced this year and next to make the jump. but the 13-inch Retina MacBook Pro doesn't have that problem yet. We are all blessed with a gift and filled with a purpose and For some they know instantly and some don't find out until later.. On top of that ..Everyday I am up missing sleepwriting and creating new ways to be great at what I do I want you all to know I am working hard to create my own revenue as well I am just asking for help not handouts?com/robotpencil
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