Leaked: Sigma 70mm f/2.8 DG MACRO | Art

Canon Rumors Guy

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  • Jul 20, 2010
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    <p>Along with the 105mm f/1.4 DG HSM Art, it looks like Sigma will announce a 70mm f/2.8 DG Macro Art series lens.</p>
    <p>Specifications and announcements can be expected some time in the next few days.</p>
    
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    Sharlin said:
    Not every new Sigma lens has to be "special" in some way. This one only has to be a nice sharp competitively-priced 70mm f/2.8 1:1 macro lens.

    I have to agree. I think my desire for a sharp 2:1 macro manifested itself.

    With this announcement, it is not too surprising that the 105mm macro is $400 off.
     
    Upvote 0
    Chaitanya said:
    New images have been posted and that lens still has extending barrel like old model. Quite a bit of disapointment since Nikon has been offering a Af-s 60mm Macro with weather sealing and internal focus since 2008.

    Please post a link or images. My Milvus 100 extends, so I can't complain about Sigma doing the same.

    No OS or HSM on the lens barrel, either...hmm.
     
    Upvote 0

    Chaitanya

    EOS 5D Mark IV
    Jun 27, 2013
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    chrysoberyl said:
    Chaitanya said:
    New images have been posted and that lens still has extending barrel like old model. Quite a bit of disapointment since Nikon has been offering a Af-s 60mm Macro with weather sealing and internal focus since 2008.

    Please post a link or images. My Milvus 100 extends, so I can't complain about Sigma doing the same.

    No OS or HSM on the lens barrel, either...hmm.
    I personally like to have lenses internally focus as there has been ingress of water drops while have used my camera in Western ghats. Its just personal prefrence based on the weather of my favourite place on earth to visit for macro photography.
    Here is the link:
    http://www.nokishita-camera.com/2018/02/105mm-f14-dg-hsm-art70mm.html?m=1
     
    Upvote 0
    Chaitanya said:
    I personally like to have lenses internally focus as there has been ingress of water drops while have used my camera in Western ghats. Its just personal prefrence based on the weather of my favourite place on earth to visit for macro photography.
    Here is the link:
    http://www.nokishita-camera.com/2018/02/105mm-f14-dg-hsm-art70mm.html?m=1

    Thank you! So it does have AF. And a 49mm filter?
     
    Upvote 0

    Chaitanya

    EOS 5D Mark IV
    Jun 27, 2013
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    chrysoberyl said:
    Chaitanya said:
    I personally like to have lenses internally focus as there has been ingress of water drops while have used my camera in Western ghats. Its just personal prefrence based on the weather of my favourite place on earth to visit for macro photography.
    Here is the link:
    http://www.nokishita-camera.com/2018/02/105mm-f14-dg-hsm-art70mm.html?m=1

    Thank you! So it does have AF. And a 49mm filter?
    Yes looks like it, but now a days 49mm filter thread is more common as more and more manufacturers are using it unlike in old days when it was predominantly Pentax who used it.
     
    Upvote 0
    Chaitanya said:
    Yes looks like it, but now a days 49mm filter thread is more common as more and more manufacturers are using it unlike in old days when it was predominantly Pentax who used it.

    But the old version has a 62mm filter, as does the Laowa 60mm f/2.8 2X. If the images are accurate, then there is an implication here that I do not have the knowledge to fathom.
     
    Upvote 0

    ahsanford

    Particular Member
    Aug 16, 2012
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    Sharlin said:
    chrysoberyl said:
    Besides being 70mm, but what will make this special? 2X? f/1.8? If both, I'm interested.

    Not every new Sigma lens has to be "special" in some way. This one only has to be a nice sharp competitively-priced 70mm f/2.8 1:1 macro lens.

    ...that is externally focusing like the EF 50mm f/2.5 compact macro. Ouch.

    Can someone tell me what that's a good thing? The EF-S 60mm and EF 100mm L and non-L are all internally focusing, are they not? Why does this Sigma need to telescope out so dramatically?

    - A
     
    Upvote 0

    aceflibble

    EOS RP
    May 8, 2015
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    Internally-focusing macros have to use strong focus breathing to focus down to 1:1 (let alone beyond), and it takes a bigger toll on transmission, too. For example, the Canon 100mm f/2.8L IS Macro, when it's at absolute 1:1, is actually about 72mm t/7.4. (Give-or-take for minor copy variation and specific shooting scenario; I haven't used the EF-S 60mm or non-L 100mm to have their measurements to hand.) Of course weight and cost also go up.

    Externally-focusing macro lenses can go to whatever magnification you want without changing the actual focal length, and though of course light is lost as the lens extends, it's usually not actually as much of a loss as when the lens has to shift everything around internally. That's the benefit to simpler designs like this. So this Sigma probably stays at 70mm no matter what magnification you want, and likely gets no darker than t/5 or so.

    It used to be that externally-focusing lenses also had less trouble with distortion, but these days that's mostly equalised.

    All that said, I would expect the most likely reason for going for external focus is simply cost. Sigma have proven they can nail extremely demanding optics, but they are still somewhat obligated to keep their prices below first-party options. With Tamron undercutting them even further, I wouldn't be surprised if Sigma doubled down on their own penny-pinching.
     
    Upvote 0

    FramerMCB

    Canon 40D & 7D
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    Sep 9, 2014
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    aceflibble said:
    Internally-focusing macros have to use strong focus breathing to focus down to 1:1 (let alone beyond), and it takes a bigger toll on transmission, too. For example, the Canon 100mm f/2.8L IS Macro, when it's at absolute 1:1, is actually about 72mm t/7.4. (Give-or-take for minor copy variation and specific shooting scenario; I haven't used the EF-S 60mm or non-L 100mm to have their measurements to hand.) Of course weight and cost also go up.

    Externally-focusing macro lenses can go to whatever magnification you want without changing the actual focal length, and though of course light is lost as the lens extends, it's usually not actually as much of a loss as when the lens has to shift everything around internally. That's the benefit to simpler designs like this. So this Sigma probably stays at 70mm no matter what magnification you want, and likely gets no darker than t/5 or so.

    It used to be that externally-focusing lenses also had less trouble with distortion, but these days that's mostly equalised.

    All that said, I would expect the most likely reason for going for external focus is simply cost. Sigma have proven they can nail extremely demanding optics, but they are still somewhat obligated to keep their prices below first-party options. With Tamron undercutting them even further, I wouldn't be surprised if Sigma doubled down on their own penny-pinching.

    A+. 8)
     
    Upvote 0

    Tanispyre

    EOS M6 Mark II
    Dec 25, 2013
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    The old 70mm Sigma macro was one of the best short macros (short for me is < 100mm) optically I have ever used. Easily it out performed the Canon 50 F2.5, Nikon 60 F2.8, and the Tamron 60 mm F2 macro lenses I have used. The Canon EF-S 60 mm was pretty close optically, but as the Sigma was full frame I would probably give the nod to the Sigma. If all they did was update the housing and focusing, then this will still be an excellent lens.
     
    Upvote 0