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  • Sigma 19mm f/2.8 EX DN (NEX) Lens Review
    s 16mm lens that s why we can claim that Sigma is really an improvement over the otherwise mediocre Sony s UWA MTF50 Sony NEX 5n MTF50 Sony NEX 7 LW PH Sony NEX 5n LW PH Sony NEX 7 Of course arguing about raw MTF50 chart is as useful to a practitioner as a cold shower to a cat So instead let s take a look at the simplified SQF charts below just don t forget that there s a reason SQF is called subjective Here we can see that the lens does not offer much flexibility when it comes to prints with all print sizes over 17in probably showing some visible quality problems around corners SQF Sony NEX 5n SQF Sony NEX 7 Before moving on to the next section let s first take a look at the crops from the imaging target and then some real life tests The crops show clear difference in image quality with both NEX 5n as well as NEX 7 Borders at f 2 8 are visibly softer in both cases sort of confirming what Imatest seems to be complaining about Sony NEX 5n Sony NEX 7 Eyeballing the results from the real life tests all done at the infinity with NEX 7 and uncorrected for artifacts we can observe some minor softness around corners at f 2 8 As we stop down the lens image quality around corners improves and by f 8 there is no major difference between the center and the corners Center seems more or less uniform throughout the aperture range Unfortunately monitor is not necessarily the best medium for noticing subtle changes and at normal viewing distances some artifacts even softness around corners might not be very noticeable you d need to blow up the picture to higher magnification to be able to see subtle variation in quality as you stop down the lens from f 2 8 So the bottom line is that unless you are really obsessed at pixel peeping or plan to print in large format you are probably gonna be reasonably happy with the overall quality of images produced by Sigma 19 2 8 DN Center L L Corner U R Corner Color Rendering Sigma 19mm f 2 8 EX DN is one of the dozens if not hundreds of lenses that don t really have anything unique about the way they render images There is nothing wrong with that meaning that users get fairly consistent and predictable performance albeit without any memorable characteristics Conventional boring predictable consistent pick your adjective here Like many UWA lenses out there Sigma 19 2 8 EX DN produces reasonably well saturated colors with the color gamut that seems to be shifted slightly towards blues Not exactly cool blue a la Zeiss but slightly warmer blue Contrast levels streight out of camera are fairly good global contrast varies from moderate at wider aperture to moderately high at smaller apertures Tonal reproduction is average with balanced range across

    Original URL path: http://slrlensreview.com/web/reviews/sigma/sigma-wide-angle/803-sigma-19mm-f28-ex-dn-nex?tmpl=component&print=1&page= (2016-02-18)
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  • SLR Lens Review
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    Original URL path: http://slrlensreview.com/web/component/mailto/?tmpl=component&template=rt_modulus_j16&link=e877546407e0a8b750fc0acb7add92829eeab064 (2016-02-18)
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  • Sigma 19mm f/2.8 EX DN (NEX) Lens Review
    both NEX as well as mFT cameras and retails at 199 as of April 2012 Along with its 30 2 8 EX DN cousin the 19mm lens targets entry level market and fills in a niche between Sony s UWA 16 2 8 and 24 1 8 lenses The optical construction of the lens consists of 8 elements in 6 groups with three aspherical surfaces The build quality is consumerish with plastic barrel and plastic knurled focusing ring The lens is fairly compact and light measuring 60 6x45 7mm 2 4x1 8in and weighing 140g 4 9oz The lens accept 46mm screw in type filters Aperture is electronically controlled with min aperture of f 22 The minimum focusing distance is 20cm 7 9in View 1 View 1 THe manufacturer s box contains the lens front and rear caps plastic lens hood and manual registration cards Within the scope of this review the lens was tested on APS C type Sony NEX 5n and Sony NEX 7 cameras where its EFOV is 28mm Summary Lens Composition 8 elements in 6 groups Angular Field 59 degrees Sony NEX Minimum Focus 20cm 7 9in Focusing Action AF MF f stop Scale f 2 8 f 22 electronic Filter Size 46mm Lens Hood Plastic included Weight 140g 4 9oz Dimensions 60 6x45 7mm 2 4x1 8 Lens Case Soft pouch included Retail Price 199 2012 Depreciation 50 2012 Handling As the first native WA alternative lens Sigma 19 2 8 holds a lot of promise Sitting between the ho hum Sony 16 2 8 and super expensive Sony Zeiss 24 1 8 lenses Sigma offers a lof of appeal to someone who is willing to sacrifice a little bit in FL but save in costs and possibly even get an improvement in quality Performance

    Original URL path: http://slrlensreview.com/web/reviews/sigma/sigma-wide-angle/803-sigma-19mm-f28-ex-dn-nex?showall=&limitstart= (2016-02-18)
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  • Test Report Part I (Resolution, Color, DOF) - Page 2
    away If we were to review the lens in isolation meaning not using any other benchmark whatsover we could say that performance characteristics of the lens are decent but not remarkable The patterns are very similar on both NEX 5n as well as NEX 7 Outstanding center resolution throughout the aperture range and average border performance This is quite common in most wiide angle lenses and this is particularly true on NEX 7 which puts significantly more pressure on the lens corners in general corners are softer than the center particularly at wider apertures Sigma follows this trend but the absolute difference between center and borders is not as large as with the Sony s 16mm lens that s why we can claim that Sigma is really an improvement over the otherwise mediocre Sony s UWA MTF50 Sony NEX 5n MTF50 Sony NEX 7 LW PH Sony NEX 5n LW PH Sony NEX 7 MTF50 Sony NEX 5n MTF50 Sony NEX 7 LW PH Sony NEX 5n LW PH Sony NEX 7 Of course arguing about raw MTF50 chart is as useful to a practitioner as a cold shower to a cat So instead let s take a look at the simplified SQF charts below just don t forget that there s a reason SQF is called subjective Here we can see that the lens does not offer much flexibility when it comes to prints with all print sizes over 17in probably showing some visible quality problems around corners SQF Sony NEX 5n SQF Sony NEX 7 SQF Sony NEX 5n SQF Sony NEX 7 Before moving on to the next section let s first take a look at the crops from the imaging target and then some real life tests The crops show clear difference in image quality with both NEX 5n as well as NEX 7 Borders at f 2 8 are visibly softer in both cases sort of confirming what Imatest seems to be complaining about Sony NEX 5n Sony NEX 7 Sony NEX 5n Sony NEX 7 Eyeballing the results from the real life tests all done at the infinity with NEX 7 and uncorrected for artifacts we can observe some minor softness around corners at f 2 8 As we stop down the lens image quality around corners improves and by f 8 there is no major difference between the center and the corners Center seems more or less uniform throughout the aperture range Unfortunately monitor is not necessarily the best medium for noticing subtle changes and at normal viewing distances some artifacts even softness around corners might not be very noticeable you d need to blow up the picture to higher magnification to be able to see subtle variation in quality as you stop down the lens from f 2 8 So the bottom line is that unless you are really obsessed at pixel peeping or plan to print in large format you are probably gonna be reasonably happy with the overall quality of

    Original URL path: http://slrlensreview.com/web/reviews/sigma/sigma-wide-angle/803-sigma-19mm-f28-ex-dn-nex?showall=&start=1 (2016-02-18)
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  • Test Report Part II (Flare, Vignetting, Distortion) - Page 3
    Standard Zoom Telephoto Zoom Tamron Wide Angle Macro Wide Angle Zoom Standard Zoom Telephoto Zoom Telephoto Tokina Wide Angle Standard Macro Wide Angle Zoom Standard Zoom Telephoto Zoom Voigtlander Wide Angle Standard Telephoto Macro Misc Mamiya Wide Angle 645 Standard 645 Telephoto 645 Russian Meyer Pentacon Contact Us Member Login Home Reviews Sigma Wide Angle Sigma 19mm f 2 8 EX DN NEX Lens Review Sigma 19mm f 2 8 EX DN NEX Lens Review Test Report Part II Flare Vignetting Distortion Last Updated on 15 July 2012 Hits 16425 Article Index Sigma 19mm f 2 8 EX DN NEX Lens Review Test Report Part I Resolution Color DOF Test Report Part II Flare Vignetting Distortion Test Report Part III Macro Coma Test Report Part IV Recommendation Sample Images Test Report Part IV User Reviews Tweet Page 3 of 6 Flare Flare control is average in the Sigma 19 2 8 EX DN lens You can observe that the lens shows some flare and color streaks across the frame in situations when a strong light source in this case sun is within the picture frame Overall however this is not a terrible result given the focal length of the lens

    Original URL path: http://slrlensreview.com/web/reviews/sigma/sigma-wide-angle/803-sigma-19mm-f28-ex-dn-nex?showall=&start=2 (2016-02-18)
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  • Test Report Part III (Macro, Coma) - Page 4
    Telephoto Telephoto Zoom Sony Minolta Wide Angle Standard Telephoto Macro Wide Angle Zoom Standard Zoom Telephoto Zoom Tamron Wide Angle Macro Wide Angle Zoom Standard Zoom Telephoto Zoom Telephoto Tokina Wide Angle Standard Macro Wide Angle Zoom Standard Zoom Telephoto Zoom Voigtlander Wide Angle Standard Telephoto Macro Misc Mamiya Wide Angle 645 Standard 645 Telephoto 645 Russian Meyer Pentacon Contact Us Member Login Home Reviews Sigma Wide Angle Sigma 19mm f 2 8 EX DN NEX Lens Review Sigma 19mm f 2 8 EX DN NEX Lens Review Test Report Part III Macro Coma Last Updated on 15 July 2012 Hits 16425 Article Index Sigma 19mm f 2 8 EX DN NEX Lens Review Test Report Part I Resolution Color DOF Test Report Part II Flare Vignetting Distortion Test Report Part III Macro Coma Test Report Part IV Recommendation Sample Images Test Report Part IV User Reviews Tweet Page 4 of 6 Macro Like the Sony E 16 2 8 Sigma s 19mm lens is not particularly well suited for macro photography The lens gives you magnification rate of 0 14x at the MFD which is not particularly exciting in the macro world The lens does retain its sharpness in

    Original URL path: http://slrlensreview.com/web/reviews/sigma/sigma-wide-angle/803-sigma-19mm-f28-ex-dn-nex?showall=&start=3 (2016-02-18)
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  • Test Report Part IV (Recommendation, Sample Images) - Page 5
    Misc Mamiya Wide Angle 645 Standard 645 Telephoto 645 Russian Meyer Pentacon Contact Us Member Login Home Reviews Sigma Wide Angle Sigma 19mm f 2 8 EX DN NEX Lens Review Sigma 19mm f 2 8 EX DN NEX Lens Review Test Report Part IV Recommendation Sample Images Last Updated on 15 July 2012 Hits 16425 Article Index Sigma 19mm f 2 8 EX DN NEX Lens Review Test Report Part I Resolution Color DOF Test Report Part II Flare Vignetting Distortion Test Report Part III Macro Coma Test Report Part IV Recommendation Sample Images Test Report Part IV User Reviews Tweet Page 5 of 6 Alternatives As mentioned earlier in the review currently there are not that many choices out there for native Sony NEX mount UWA lenses If you re shooting m43 cameras you are lucky there is a ton of opptions available but Sony users are stuck with either a rather mediocre Sony E 16 2 8 lens or super expensive Sony Zeiss 24 1 8 lens A possible solution is to use an Alpha mount UWA lens like Minolta Sony AF 20 2 8 with an E LA1 E LA2 adapter Or opt for a fish eye like Samyang 8mm f 3 5 and use a PTLens distortion correction to fix the fish eye effect If you don t mind shooting in a manual mode then a wide selection of rangefinder lenses like Voigtlander Ultra Wide Heliar 12 5 6 and Voigtlander Wide Heliar 15 4 5 or any of the UWA Nikkor Ai Ai S lenses should also be considered Recommendation As a new entrant into the NEX market segment Sigma is certainly doing quite well Sigma 19 2 8 EX DN is the company s second solid offering the first one was 30 2

    Original URL path: http://slrlensreview.com/web/reviews/sigma/sigma-wide-angle/803-sigma-19mm-f28-ex-dn-nex?showall=&start=4 (2016-02-18)
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  • Test Report Part IV (User Reviews) - Page 6
    Macro Wide Angle Zoom Standard Zoom Telephoto Telephoto Zoom Sony Minolta Wide Angle Standard Telephoto Macro Wide Angle Zoom Standard Zoom Telephoto Zoom Tamron Wide Angle Macro Wide Angle Zoom Standard Zoom Telephoto Zoom Telephoto Tokina Wide Angle Standard Macro Wide Angle Zoom Standard Zoom Telephoto Zoom Voigtlander Wide Angle Standard Telephoto Macro Misc Mamiya Wide Angle 645 Standard 645 Telephoto 645 Russian Meyer Pentacon Contact Us Member Login Home

    Original URL path: http://slrlensreview.com/web/reviews/sigma/sigma-wide-angle/803-sigma-19mm-f28-ex-dn-nex?showall=&start=5 (2016-02-18)
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