February 21, 2017, 04:17:40 PM

Recent Posts

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Third Party Manufacturers / Re: SIGMA Announces the 24-70mm F2.8 DG OS HSM
« Last post by AvTvM on Today at 03:28:41 PM »
Sigma global website, lens performance data page. MTF charts, vignetting, distortion ...
https://www.sigma-global.com/en/lenses/cas/product/art/a_24_70_28/data/

How does MTF compare to Canon 24-70 2.8 II ?
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How is Sigma going to produce all of these new lenses in the near term?  Do they have the production capacity or new facilities?  Does anyone know?  Or, are we going to have to wait a long time for these to hit the shelves?
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Third Party Manufacturers / Re: SIGMA Announces the 24-70mm F2.8 DG OS HSM
« Last post by LDS on Today at 02:50:18 PM »
https://www.sigma-global.com/en/lenses/cas/product/art/a_24_70_28/data/
This is very interesting.

It's also interesting it doesn't report the weight. "TBD" ???
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isnt 400mm f6.3 little slow? they could have made 400mm f 5.6, we should wait and see for the pricing compared to Canon/Nikon.
have they published MTF chart?

Why yes they have.
https://www.sigma-global.com/en/lenses/cas/product/contemporary/c_100_400_5_63/data/

This thing is a BEAST!

Without a lense collar!!!

Normally I would say the lack of a tripod foot is a negative thing, but in this case I'm not so sure.

The Sigma 100-400C is only 3oz heavier than the Canon 70-300.
http://www.the-digital-picture.com/Reviews/Canon-EF-70-300mm-f-4-5.6-IS-L-USM-Lens-Review.aspx
That lens does have the option for a collar, but most reviews put it in the role of a highly versatile walk-around lens. Probably at the top of the weight range of what people would consider for that role, but if there's less than 10% weight difference between the two then the stated focus of making a 400mm zoom handle like a 300mm zoom seems reasonable.

Now we just have to hope that the price drops in proportion to the weight in comparison to the 150-600C.
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Lighting / Re: Firing Godox/Streaklight with Canon optically.
« Last post by CanonFanBoy on Today at 02:44:57 PM »
I'm a dummy :) seems like all you need is just ONE pair of pass-through transceivers for the Streaklight. Basically you mount a transceiver on the camera, your Canon remote goes on top of the transceiver. Hope it helps!

Hi Jopa. It looks like this is the ticket (Yongnuo YNE3-RX https://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Dphoto&field-keywords=Yongnuo+YNE3-RX+). It is a Canon compatible receiver that would go on the Streaklight and be controlled by my ST-E3-RT. $39.00 solves my problem. :)

Thanks to all of you for your help.
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Why is anybody at all hopeful about this lens being coma-free enough for astrophotography?

Because the 12-24 has very good coma.
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Technical Support / Re: New Member with 5D MK III Streaks in Image
« Last post by Crayfordmedia on Today at 02:41:08 PM »
I'm always a bit amazed at these types of posts. It like your having an issue with your car and desperately trying to describe a noise when you start or go around a curve. You'll spend days on a forum going back and forth with "did you do this..." or "Are you using this...". Then you'll end up taking it to a mechanic and have wasted 3-4 days on the internet.

In the end you'll either live with it or take it to CPS... so here is my advice. Return it if you can or send it in for repair... or live with it.

I  was wondering what it was, and to make sure it get fixed correctly. It hard to explain it over the phone. Is there a way of remove these automatically in lightroom instead of doing it manual in photoshop?
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Lighting / Re: Firing Godox/Streaklight with Canon optically.
« Last post by CanonFanBoy on Today at 02:38:00 PM »
Just get yourself a Yongnuo YNE3-RX for your Streaklight and use Canon's RT system to trigger all your lights.

That looks like the ticket! Amazon order placed.

I might actually have a use for the Canons after all. I was going to try 3 per 7' umbrella (have triple threat shoes), but was worried I wouldn't have enough power.

Hopefully I'll now be able to gang 6 in one umbrella and the Streaklight in the other. Sad when you really think about it.

Thanks for the great tip! ;D
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EOS Bodies / Re: Canon eos 77D
« Last post by Sharlin on Today at 02:36:25 PM »
I would have paid a good price for a miniaturized 80D, but Canon's marketing people apparently don't want to offer a product like that.

They do provide one, though, it's called the M5. There's probably much more demand for that one than for a hypothetical Rebel-sized 80D DSLR.
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Technical Support / Re: New Member with 5D MK III Streaks in Image
« Last post by Pookie on Today at 02:34:34 PM »
I'm always a bit amazed at these types of posts. It like your having an issue with your car and desperately trying to describe a noise when you start or go around a curve. You'll spend days on a forum going back and forth with "did you do this..." or "Are you using this...". Then you'll end up taking it to a mechanic and have wasted 3-4 days on the internet.

In the end you'll either live with it or take it to CPS... so here is my advice. Return it if you can or send it in for repair... or live with it.
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