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Thread: The new 100mm FE STF lens

  1. #1
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    The new 100mm FE STF lens

    I did not see a post here about this lens.

    It's good. So sharp. And if you're used to the a-mount version--the surprising thing is that it auto focuses. If you have any questions (other than image samples--can't do that yet), ask away. It's likely going to be Sony's least understood lens. As of now, it reports the value in T-stops (rather than what most are used to--f-stops).

  2. #2
    I posted an article here http://sonyalphalab.com/new-sony-fe-...m-radio-flash/

    I was a little confused by the inclusion of T-Stops however?

    Thanks,
    Jay
    Jay - Comments, Questions, and Critiques always welcomed and encouraged!

    Current Everyday Gear: Sony A7r, Sony A6400, Sony Nex-6, Sigma 56mm f/1.4 Lens, Sigma 30mm f/1.4 Lens, Sony E 18-55mm, Sony E 55-210mm OSS Lens, Sony E 16mm f/2.8 Pancake, Rainbow Imagining MC/MD Lens Adapter w/ Minolta MD 50mm f/1.4 PG Rokkor Lens

  3. #3
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    whats a t stop...?
    Camera : Sony A6000
    Sony Lens : FE 90mm f/2.8 G OSS Macro , 18-55mm f/3.5-5.6 OSS, 10-18mm f/4 OSS ultra wide,FE 16-35mm f/4 OSS ZA Lens
    Sigma Lens : 30mm f/2.8 DN

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  4. #4
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    The t-stop is light transmission. So, in essence, wide open, you'll get the light transmission of 5.6, I believe, but the depth of field of 2.8.

  5. #5
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    oh god...really....why ?
    Camera : Sony A6000
    Sony Lens : FE 90mm f/2.8 G OSS Macro , 18-55mm f/3.5-5.6 OSS, 10-18mm f/4 OSS ultra wide,FE 16-35mm f/4 OSS ZA Lens
    Sigma Lens : 30mm f/2.8 DN

    500 px : https://500px.com/stevemeier

  6. #6
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    Quote Originally Posted by Steve View Post
    oh god...really....why ?
    For the best bokeh.

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    The apodization element takes away some light from the edges (hence the lower overall light transmission), but the bokeh is so smooth (not nervous or unnatural).

  8. #8
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    it seems it used more for videography as changes f stops would be very noticable as switching a view around etc in the same local.....so the idea is to maintain the same amount of light across the seen.
    Camera : Sony A6000
    Sony Lens : FE 90mm f/2.8 G OSS Macro , 18-55mm f/3.5-5.6 OSS, 10-18mm f/4 OSS ultra wide,FE 16-35mm f/4 OSS ZA Lens
    Sigma Lens : 30mm f/2.8 DN

    500 px : https://500px.com/stevemeier

  9. #9
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    T-stop is very much a standard measurement for video. This lens, however, is a great lens for both still and video. I was so excited that they finally made one for FE and IT'S AUTOFOCUS!

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    Name:  Screenshot_20170212-194831.jpg
Views: 264
Size:  18.3 KB

    Note the bokeh quality. Most other lenses would have a little bit of a "nervous" bokeh.

  11. #11
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    Here's another example of the bokeh quality. Name:  d935ec87c6f1b116cb8e8e8ebcbf075c.jpg
Views: 241
Size:  9.1 KB

    - - - Updated - - -

    The apodization element does that smooth, perfect circle bokeh quality.

  12. #12
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    it is very nice from that point of view
    Camera : Sony A6000
    Sony Lens : FE 90mm f/2.8 G OSS Macro , 18-55mm f/3.5-5.6 OSS, 10-18mm f/4 OSS ultra wide,FE 16-35mm f/4 OSS ZA Lens
    Sigma Lens : 30mm f/2.8 DN

    500 px : https://500px.com/stevemeier

  13. #13
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    I might be so bold as to say that bokeh is the reason you get this lens.

  14. #14
    Quote Originally Posted by SPtheALIEN View Post
    I might be so bold as to say that bokeh is the reason you get this lens.
    Yes, I totally agree with that
    Jay - Comments, Questions, and Critiques always welcomed and encouraged!

    Current Everyday Gear: Sony A7r, Sony A6400, Sony Nex-6, Sigma 56mm f/1.4 Lens, Sigma 30mm f/1.4 Lens, Sony E 18-55mm, Sony E 55-210mm OSS Lens, Sony E 16mm f/2.8 Pancake, Rainbow Imagining MC/MD Lens Adapter w/ Minolta MD 50mm f/1.4 PG Rokkor Lens

  15. #15
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    I shoot landscapes and dont do much DOF stuff when taking them.....the bokeh is very nice agreed.
    Camera : Sony A6000
    Sony Lens : FE 90mm f/2.8 G OSS Macro , 18-55mm f/3.5-5.6 OSS, 10-18mm f/4 OSS ultra wide,FE 16-35mm f/4 OSS ZA Lens
    Sigma Lens : 30mm f/2.8 DN

    500 px : https://500px.com/stevemeier

  16. #16
    It seems like the list of "fully compatible" of this SEL100F28GM is very limited. In short, only a6300, a6500, a7R II and a7S II and PXW-F55.

    Saying that, other cameras can still use the lens.
    Amateur and unskilled photographer with a very small collection of gears.

  17. #17
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    It arrived! Name:  ORG_DSC04708-01.jpg
Views: 218
Size:  102.9 KB

  18. #18
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    Name:  170325FE 100mm F2.8 STF GM OSSILCE-7RM2252-35.jpg
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    Name:  170325FE 100mm F2.8 STF GM OSSILCE-7RM2252-113.jpg
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    Name:  170325FE 100mm F2.8 STF GM OSSILCE-7RM2252-182.jpg
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    Name:  170325FE 100mm F2.8 STF GM OSSILCE-7RM2252-320.jpg
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    Name:  170325FE 100mm F2.8 STF GM OSSILCE-7RM2252-336.jpg
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  19. #19
    Elite Member leuius's Avatar
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    Quote Originally Posted by Steve View Post
    whats a t stop...?
    In short the F-stop is the geometric aperture (meaning the physical size of the lens/iris opening, compared to focal length) where the T-stop is the effective aperture (meaning the amount of light really transmitted through the lens).

    T-stop is always a higher number (or equal but very rare) than F-stop.

    Typically, the more glass in the lens, the larger the difference becomes because of reflections and light loss. In the case of the STF, there is a sort of "graduated density filter" (no effect in the center becoming more important towards the lens periphery) which blocks a portion of the light, hence the much higher 2-stop difference between T-stop and F-stop wide open. As you close down the iris, the "filter" (apodization element) is not blocking as much light and the T-stop to F-stop difference becomes less important.

    Hope this helps...

    Regards.

  20. #20
    Elite Member leuius's Avatar
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    Quote Originally Posted by SPtheALIEN View Post
    It arrived! Name:  ORG_DSC04708-01.jpg
Views: 218
Size:  102.9 KB
    Nice pictures...

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