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16
EOS Bodies / Re: Best way to clean dust off focusing screen of 5D3?
« on: February 17, 2013, 01:56:57 PM »
I'm in luck: a few puffs of the rocket blower removed it. I think it was on the mirror.

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EOS Bodies / Best way to clean dust off focusing screen of 5D3?
« on: February 16, 2013, 05:52:18 PM »
There's a large, black speck of dust in the upper-right when I look through the viewfinder of my 5D3. I suspect (but don't know for sure) that it's on the focusing screen and not in the viewfinder itself.

Unfortunately, I'm pretty OCD about this stuff and I know that speck will drive me crazy even though it won't affect the pictures. Some folks here and elsewhere have described using a blower to successfully clear the dust. (I do have a Giotto Rocket Blower.) Can someone describe that procedure — especially with an eye toward minimizing the chances of introducing new dust?

18
Lenses / Re: Which 50mm (with AF) is best from f/1.4 - f/2.0?
« on: January 29, 2013, 11:57:23 AM »
Hey everyone,

I already have a Sigma 35 and it is indeed an amazing lens.

But I tend to prefer the 50mm focal length. The Canon 50/1.4 has been okay, but it's rather uninspiring compared to the Sigma 35. Perhaps I'll just stick with the Canon until Sigma releases a new 50/1.4 in the art line. I noticed that they released a 30/1.4 Art lens for APS-C today, as well as 3 mirrorless Art lenses. Wish they would have done the 50/1.4 instead!

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Lenses / Re: Which 50mm (with AF) is best from f/1.4 - f/2.0?
« on: January 28, 2013, 11:37:02 PM »
The 50L needs to be used wide open, at f 2.0 - 2.8 the extra cost is for the bokeh.  Also focus shift can be an issues at those f stops. 

The 50L  is awesome, but damn you pay for that little extra.  Stopped down the 50/1.4 is 95%+ of the 50L.  I have no experience wit the sigma 50.

That's the problem: I primarily want to use the 50mm from f1.4 to f/2.8. I have the 24-70 II and it is amazing at f/2.8 and 50mm, so there's not much point in me having a fast 50 if I can't use it wide open.

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Lenses / Re: Which 50mm (with AF) is best from f/1.4 - f/2.0?
« on: January 28, 2013, 11:35:41 PM »

If your body has it, I'd set AFMA for about a four foot subject distance @f/1.4. Then shoot something at about 40 feet @f/1.4. If it's way OOF at 40 feet, knowing what I know now about the issue, I'd say just send it to Sigma USA as long as you like what you see at 4 feet. They now have a very good fix for this issue in my experience and if you like what you see at 4 feet its probably a copy worth keeping imo. 


This is very helpful, thanks.

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Lenses / Re: Which 50mm (with AF) is best from f/1.4 - f/2.0?
« on: January 28, 2013, 01:29:09 PM »
Thanks everyone for your replies. What I've gathered so far is:
— The Sigma 50/1.4 is probably the sharpest at f/1.4 of the bunch, and nearly a match for the 50L's bokeh
— The 50L has better build quality, weather sealing, bokeh and possibly microcontrast and color
— The Sigma is prone to AF issues

I have the Sigma 35 and it's an excellent lens. It did take two copies to get a good one, though; the first front-focused badly.

I'm trying to decide whether the additional cost of the 50L is worth it. Sounds like I might be better off trying for a good copy of the Sigma 50 first.

22
Lenses / Re: Which 50mm (with AF) is best from f/1.4 - f/2.0?
« on: January 27, 2013, 11:56:17 AM »
The only time it doesn't produce results where its bristling with detail is when shooting wide open near MFD.


What happens at MFD wide open? Reason I ask is that I frequently find myself shooting at that distance.

Maybe I'll play the Sigma lottery and order one from B&H.

23
Lenses / Re: Which 50mm (with AF) is best from f/1.4 - f/2.0?
« on: January 27, 2013, 11:29:18 AM »
I was really hoping Canon would come out with a new 50/1.4, or that Sigma would update its 50/1.4 to the "Art line" with similar quality to their new 35/1.4. No luck on either front — so far, at least.


So am I. There is something for Canon or Sigma to win here. Let's hope 2013 will bring some news on that

What about things like micro-contrast and rendering? If the 50L does better in that arena, then images can appear more crisp and defined even if it's not strictly sharper.

24
Lenses / Which 50mm (with AF) is best from f/1.4 - f/2.0?
« on: January 27, 2013, 09:28:21 AM »
I currently own the Canon 50/1.4 but am disappointed with its performance from f/1.4 to f/2.0. At f/2.0 it sharpens up nicely, but what's the point of an f/1.4 lens that can't be used wide open?

Is the 50L any better in that range? I've read so many conflicting reports about the L. Some love it, others insist there isn't much of a difference (in sharpness, at least), between it and the 50/1.4.

Then there's the Sigma 50/1.4. I've heard it might be the sharpest of all at f/1.4, but it's extremely prone to AF problems (which I'm not willing to deal with).

I was really hoping Canon would come out with a new 50/1.4, or that Sigma would update its 50/1.4 to the "Art line" with similar quality to their new 35/1.4. No luck on either front — so far, at least.

25
Lenses / Re: Would you keep a lens that required +18 AFMA?
« on: January 09, 2013, 10:47:38 PM »
Also, each unit of AFMA is 1/8 the depth of focus. So, anything over |8| units of AFMA means the lens is outside the accuracy spec for the AF system.

That is very helpful, and intuitively makes sense to me as well.

26
Lenses / Would you keep a lens that required +18 AFMA?
« on: January 09, 2013, 08:28:39 PM »
Just bought the new Sigma 85/1.4. It requires a +18 AFMA on my 5D III. I'm concerned that if I ever get a new camera body, and it front-focuses even a little bit more, that I won't be able to adjust it.

What do you think?

27
Lenses / Re: Announcement on January 8, 2013? New Lenses [CR1]
« on: December 24, 2012, 10:19:09 AM »
If this rumor is indeed true (which we don't know yet), I think it can only be positive that there will be so many good options at 35mm: the new Sigma, the current 35L (aftermarket once the 35L II goes on sale), the 35L II, and for those that need IS, the 35 IS.

I have to say, though, that I would have been happier with an announcement for a 50L II or a 50/1.4 II. That's where I feel the Canon line-up needs more attention.

28
Lenses / Re: Canon EF 50 f/1.4 IS in 2013 [CR2]
« on: December 17, 2012, 11:34:30 AM »
Anyone care to hazard a guess when this theoretical lens might be announced? Photokina? Later?

29
Lenses / Re: Canon 100mm f/2.0 for portraits
« on: December 11, 2012, 09:06:56 AM »
I think the 100/2 is one of Canon's most underrated lenses. I prefer it to the 85/1.8 on FF. I found the focal length to be better for portraits, and the IQ, AF and sharpness are excellent.

I currently have the Sigma 85/1.4, but as good as it is I'm considering selling it and getting the 100/2 again.

30
I wonder if we'll see a new Canon 50/1.4 (with IS?) before we see a new Sigma 50/1.4. Either way, I'd be happy. If Canon does as good a job as they've done with their other updated non-L primes, I'd be happy.


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