![\"SEL2470Z\"](\"http:\/\/farm8.staticflickr.com\/7336\/12369919934_c733172e91_b.jpg\")
<\/a><\/h3>\nThis is the fourth\u00a0lens released for the Sony FE-System. Specifications<\/span><\/p>\n Size: (diameter x length):<\/strong> 73mm x 94.5m Build quality<\/span><\/p>\n This lens has a good build quality, but it doesn’t feel as rugged as Carl Zeiss Lenses from the A-mount series.<\/p>\n I think the outer barrel is made from metal, as is is the filter thread, but I am not 100% certain here, might be high quality plastics as well. Zoom- and focus-ring operate smoothly but I would have liked some more resistance on the focus-ring.<\/p>\n The lens hood is rather heavy and has a nice feel to it, it also locks in quite steadily and needs a healthy amount of force to remove it.<\/p>\n I use a a7, so results might be different for the A7r. In a bright environment the speed is quite good as is the precision.<\/p>\n In a darker environment like a normally lit room (f\/4, 1\/50 Sek., ISO 3200) the AF is slower but still usable for people photography.<\/p>\n If it gets even darker it takes more than one second until the lens is focused but it still locks focus.<\/p>\n Manual Focus<\/span><\/p>\n The focusing ring isn’t too well damped and I find its operation \u00a0quite silly. Image stabilizer (OSS)<\/strong><\/p>\n I tested the OSS at 50mm and found that it made a difference of about 2 stops.<\/strong> While I got consistently sharp images at 1\/25 sec. without OSS I would get sharp images at 1\/6 with OSS activated.<\/p>\n This lens shows significant distortion, not as bad as that you have to correct it in any case but it is easily noticeable as soon as there are straight lines in the image.<\/p>\n The Distortion changes around 32mm from barrel to pincushion.<\/p>\n If you shoot JPG the image is automatically corrected and you won’t see any distortion. It is not possible to deactivate distortion correction.<\/p>\n Here is one example to illustrate the degree of distortion: It is also interesting to note, that the lens has a wider field of view than e.g. the Zeiss 2\/24, I think the reason for that is that distortion correction will lead to a slight crop of the image, so the corrected image will have the same field of view.<\/span><\/p>\n I like the bokeh quite a lot for less demanding scenes like this: Sadly but not unexpectedly I noticed onion rings in the bokeh:<\/p>\n What I also noticed was that even at f\/4 the highlight discs aren’t perfectly circular.<\/p>\n <\/p>\n but when we look at more demanding scenes like this one with the subject not too close and details in the background it can get rathe ugly: <\/p>\n These are from Sony and they are calculated with some rather questionable assumptions, so they are in no way comparable to MTF-charts from Zeiss or Leica. But they can be useful to compare this lens against other lenses from Sony and they show massive astigmatism at 24mm.<\/p>\n 24mm Most of the frame is super sharp and contrasty from f\/4 with surprisingly little change as the lens is stopped down. 30mm<\/strong><\/p>\n Most of the frame shows good sharpness and great contrast \u00a0from f\/4. 44mm<\/strong><\/p>\n thats a pretty good performance! 70mm<\/strong><\/p>\n At f\/4 the whole image is somewhat softer.![\"SEL2470Z\"](\"http:\/\/farm3.staticflickr.com\/2853\/12369467455_e19af8f4bb_b.jpg\")
<\/a><\/p>\nIntroduction<\/b><\/h3>\n
\nIn theory it should be good for many applications like reportage or travel photography. In this review I will try to assess how well it performs.<\/p>\n
\nFilter Thread:<\/strong>\u00a067mm
\nWeight:<\/strong>\u00a0430g
\nMinimum Focusing Distance: <\/strong>40cm
\nMagnfication:<\/strong> 0.2
\nPrice:
\n<\/strong><\/p>\n\n
\nThe inner barrel is made from plastics and shows no play.<\/p>\nAutofocus<\/h3>\n
\nAF speed is good but not on the same level as good DSLR lenses.<\/p>\n
\nIf you turn it fast you can change focus \u00a0from 40cm to infinty by turning the focusing ring less than 30\u00b0.
\nIf you turn it slowly you can change focus from 40cm to 50cm in 90\u00b0.
\nI could focus it precisely but I didn’t like the experience and would have preferred an speed independent implementation.<\/p>\nDistortion<\/h3>\n
\n![\"SEL2470Z_70mm_Distortion\"](\"http:\/\/farm8.staticflickr.com\/7297\/12467913283_aeff3af26f_b.jpg\")
<\/a><\/p>\nBokeh<\/h3>\n
\n![\"DSC09166\"](\"http:\/\/farm6.staticflickr.com\/5525\/12345156613_0563649b5a_o.jpg\")
<\/a><\/p>\n![\"DSC09312\"](\"http:\/\/farm8.staticflickr.com\/7458\/12350426965_da2f9f2e57_o.jpg\")
<\/a><\/p>\n![\"DSC09310\"](\"http:\/\/farm8.staticflickr.com\/7335\/12350879954_b3bcfa9cd2_o.jpg\")
<\/a><\/p>\n
\n![\"DSC09385.jpg\"](\"https:\/\/farm8.staticflickr.com\/7081\/13987550154_ab77eea91d_k.jpg\")
<\/a><\/p>\n\u00a0MTF Charts<\/h3>\n
![\"SEL2470Z_MTF\"](\"http:\/\/farm3.staticflickr.com\/2863\/12350124513_426fb7a8f9_o.jpg\")
<\/a><\/p>\nSharpness<\/h3>\n
\n<\/strong><\/p>\n
\nThe corners and parts of the edges are rather lousy and stay lousy from f\/4 to f\/11. Sagittal structured are much sharper than tangential ones, so the lens shows astigmatism.<\/p>\n![\"CarlZeiss_2470mmf4_24mm_infinity\"](\"http:\/\/farm4.staticflickr.com\/3729\/12350430494_1223cfba3f_o.jpg\")
<\/a><\/p>\n
\nThe corners are okayish at f\/4, improve quite a bit at f\/5.6 and become quite good at f\/8.
\n![\"CarlZeiss_2470mmf4_30mm_infinity\"](\"http:\/\/farm3.staticflickr.com\/2864\/12350152653_b56e4269fa_o.jpg\")
<\/a><\/p>\n
\nThe Image is quite sharp from corner to corner even at f\/4, the corners aren’t as sharp as the center but the falloff is low.
\n![\"CarlZeiss_2470mmf4_44mm_infinity\"](\"http:\/\/farm8.staticflickr.com\/7346\/12350152543_eef01ef3db_o.jpg\")
<\/a><\/p>\n
\nAt f\/5.6 most of the image is sharp with okayish corners.
\nAt f\/8 the corners improve a little, but they aren’t great.<\/p>\n
![\"CarlZeiss_2470mmf4_70mm_infinity\"](\"http:\/\/farm4.staticflickr.com\/3777\/12349970965_0ab4db10d9_o.jpg\")
<\/a><\/p>\n![\"Corner\"](\"https:\/\/farm8.staticflickr.com\/7293\/12361803925_82961e9b1b_o.jpg\")
<\/a><\/p>\n