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Sigma launches a slew of new lenses - Photography

The 30mm f:1.4 is interesting, but I can't figure out why it's so big. 76 mm (3.0 in) x 59 mm (2.3 in) 62mm filter. APS-C coverage Typical of Sigma no Pentax mount... "Siddhartha Jain" <co.uk> wrote in message news:googlegroups.com... ...

  1. #1

    Default Re: Sigma launches a slew of new lenses

    The 30mm f:1.4 is interesting, but I can't figure out why it's so big. 76 mm
    (3.0 in) x 59 mm (2.3 in) 62mm filter. APS-C coverage Typical of Sigma no
    Pentax mount...


    "Siddhartha Jain" <co.uk> wrote in message
    news:googlegroups.com... 


    Darrell Guest

  2. #2

    Default Sigma launches a slew of new lenses

    http://www.dpreview.com/news/0502/05021401sigma10dgs.asp
    - APO 50-500mm F4-6.3 EX DG
    - APO 70-200 mm F2.8 EX DG
    - APO 80-400mm F4.5-5.6 EX DG OS
    - APO 100-300mm F4 EX DG
    - APO 120-300mm F2.8 EX DG
    - APO 300-800mm F5.6 EX DG
    - APO 180mm F3.5 EX DG
    - APO 300mm F2.8 EX DG
    - APO 500mm F4.5 EX DG
    - APO 800mm F5.6 EX DG
    - Sigma 18-200mm F3.5-6.3 DC
    - Sigma 10-20mm F4.0-5.6 EX DC HSM
    - Sigma 30mm F1.4 EX DC HSM

    Siddhartha Guest

  3. #3

    Default Re: Sigma launches a slew of new lenses

    Got to like the 30mm f:1.4 (Dimensions (dia x len) 76 mm (3.0 in) x 59 mm
    (2.3 in) 62mm filter) I can't figure out why a APS-C/DX lens like that is
    so big. Optics theory would indicate that a element diameter of 30mm should
    yield a 30mm f:1.0 allow for some light loss (1 stop is generous) and you'll
    get f:1.4. So I can't figure out why it's huge. Maybe Pentax will update
    their old 30mm like they did with their old 40mm f:2.8 "Pancake" lens.


    "Randall Ainsworth" <techline.com> wrote in message
    news:150220050544453979%techline.com... 
    > >
    > > When Sigma tried to claim that the SD9 was a 10 megapixal
    > > camera I concluded that they are liars and not to be trusted.[/ref]
    >
    > Wise decision...[/ref]


    Darrell Guest

  4. #4

    Default Re: Sigma launches a slew of new lenses

    Siddhartha Jain wrote: 


    That's $1,000 for the OS (Optical Stabilized)
    http://www.shutterbug.com/test_reports/1104sb_sigma/

    Nikon's 70-200 f2.8 is $1600
    paul Guest

  5. #5

    Default Re: Sigma launches a slew of new lenses

    "Siddhartha Jain" <co.uk> wrote in message
     

    This looks like a good alternative to the Canon EF-S 10-22. But Sigma's
    12-24 was much poorer than the Canon 10-22, so I don't hold out much hope
    for the Sigma 10-20. It's have to be a lot less expensive than the Canon
    10-22, which goes for $650 on sale.


    Steven Guest

  6. #6

    Default Re: Sigma launches a slew of new lenses


    "Steven M. Scharf" <net> wrote in message
    news:jh4Qd.157$news.atl.earthlink.net... [/ref]
     

    It's too slow and typical of their wides it's probably and too soft at
    anything more than f/8. But I'll be tempted as it will fit a 1D, unlike the
    Canon EF-S version, if they can get the price well under $500.


    Dave Guest

  7. #7

    Default Re: Sigma launches a slew of new lenses

    "Dave R knows who" <com> wrote in message
    news:bw4Qd.6748$sonic.net... [/ref]

    >
    > It's too slow and typical of their wides it's probably and too soft[/ref]
    at 
    unlike the 

    Yes, Sigma always seem to have slower lenses. I hesitated about the EFs
    10-22 because I can't use it on my Canon film body, but since I already
    have a 20-35 for the film body, it'll be okay. The Sigma EX lenses seem
    to be moving down-market, no longer as good as the consumer lenses from
    Canon or Nikon. But if the 10-20 Sigma is good at f/8 that'd have been
    good enough for me, as long as it sold for $400-450 or so, rather than
    the $650 of the Canon. But I have a feeling that Sigma is going to
    price the 10-20 at $600-700.

    Scharf-DCA Guest

  8. #8

    Default Re: Sigma launches a slew of new lenses

    "Dave R knows who" <com> wrote in message
    news:bw4Qd.6748$sonic.net... [/ref]

    >
    > It's too slow and typical of their wides it's probably and too soft[/ref]
    at 
    unlike the 

    Yes, Sigma always seem to have slower lenses. I hesitated about the EFs
    10-22 because I can't use it on my Canon film body, but since I already
    have a 20-35 for the film body, it'll be okay. The Sigma EX lenses seem
    to be moving down-market, no longer as good as the consumer lenses from
    Canon or Nikon. But if the 10-20 Sigma is good at f/8 that'd have been
    good enough for me, as long as it sold for $400-450 or so, rather than
    the $650 of the Canon. But I have a feeling that Sigma is going to
    price the 10-20 at $600-700.

    Scharf-DCA Guest

  9. #9

    Default Re: Sigma launches a slew of new lenses

    Siddhartha Jain wrote:
     

    This one sounds interesting....
     

    So does this...
     

    I'm a nature photographer and a Canon lens fan, but will have to see how
    these lenses are rated.


    Jim Guest

  10. #10

    Default Re: Sigma launches a slew of new lenses

    Siddhartha Jain <co.uk> wrote: 

    When Sigma tried to claim that the SD9 was a 10 megapixal
    camera I concluded that they are liars and not to be trusted.

    --
    Ray Fischer
    net

    Ray Guest

  11. #11

    Default Re: Sigma launches a slew of new lenses

    In article <curuhf$mdt$sonic.net>, Ray Fischer
    <sonic.net> wrote:
     
    >
    > When Sigma tried to claim that the SD9 was a 10 megapixal
    > camera I concluded that they are liars and not to be trusted.[/ref]

    Wise decision...
    Randall Guest

  12. #12

    Default Re: Sigma launches a slew of new lenses

    "Siddhartha Jain" <co.uk> wrote in message
    news:googlegroups.com... 

    I'm still not sure what the difference might be between the existing 70-200
    f/2.8 and the 'DG' other than the designation; it's not a DC so it should
    still work fine on a full-frame sensor w/o vignetting.

    Mark


    Mark Guest

  13. #13

    Default Re: Sigma launches a slew of new lenses


    "Darrell" <dev/null> wrote in message
    news:com... 


    It's not a DC lens so it can still be used on full-frame cameras, thus the
    size. There's no specifics on exactly what DG (digitally optimized) means.

    Mark


    Mark Guest

  14. #14

    Default Re: Sigma launches a slew of new lenses

    "Mark B." <net> wrote in message
    news:com...

    [regarding the Sigma 30mm f/1.4]
     

    Sorry, but it's a DC lens. See
    http://sigma-photo.com/lenses/lenses_all_details.asp?id=3300&navigator=6


    Andrew Guest

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