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Messages - pensive tomato

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1
do you mean that the ML folks determine that using full ISOs is the recommended course of action to decrease noise and optimize DR? Or do you mean that an ML hack already makes this a moot point?
The latter, though I wouldn't call it a hack - by fine-tuning the full iso stops the bleeding edge Magic Lantern is able to crank an additional 1/3-1/2 stop from full isos, much more than any potential improvement you'd get from Canon's 1/3 ev steps.

Thanks for the reply, that's informative. As you pointed out in another thread, that's one more reason to consider ML (although I'm a bit hesitant with my 6D still being under warranty).

By the way, I meant hack as a compliment, more along the lines of creative tinkering of existing resources  :)

2
I look forward to your tests, have you managed to do it yet?

Hopefully not, the latest Magic Lantern research adding 1/3-1/2 stop to full isos make the 160x values completely obsolete, even if they're a tiny bit better than Canon's defaults.

Marsu42, I'm not fully following what you're saying, do you mean that the ML folks determine that using full ISOs is the recommended course of action to decrease noise and optimize DR? Or do you mean that an ML hack already makes this a moot point? Thanks for any clarification!

3
Hope that helps...

Most definitively! Thanks for all the info and tips. Good point about light perhaps bouncing a bit and helping communication with the master. I've used the 600EX as a background light on a stand, which works fine with macros of static subjects, but I like the idea of a more portable solution. I've run into some of the issues you described at the end of your post while using the 100mm macro with the MT-24EX. That made me wonder about the usefulness of the hood, so it's great to have your take on that.

Thanks a lot!

4
Here's that rig set up with the 100L:




Neuro, great seeing your portable setup (and very nice portrait of the mantis!). A few questions:

1) Do you see any benefits of using the omni-bounce on the MT-24EX? I think it's there in your setup, but I wonder about its effectiveness taking into account the suggested use of the omni-bounce versus the nature of macro lighting.

2) I really like the idea of the extension bracket for background light. Have you experienced any problems with line-of-sight contact getting the flash to fire?

3) I've been tempted by the MP-E 65mm for a while. Do you use the use Canon's hood on it? If so, what's your experience, particularly if attaching the MT-24 EX directly to the lens with the ring adapter?

5
Lenses / Re: Canon 24-105 vs canon 24-70 ii
« on: December 25, 2013, 11:26:23 AM »
What I originally intended to say, but failed to do :-) was that shooting with a f4 lens on the 6d gives you far less headaches and things to consider, and thus "works better" - that's from a naive usability, and not from a technical standpoint. So from Canon's point of view, packaging the 6d with a f4 lens or even designing one for it is a good business decision, avoiding "Um, 10/11 of my af points don't quite work as I'd expect" service inquiries.

I wonder if regional distribution decisions play a bigger role in deciding which f/4 to bundle with the 6D. In the U.S., the 6D is still bundled with the 24-105mm; whereas now we see the 5D3 being offered with either of the f/4 lenses. I would figure that as market and inventory conditions allow, we'll see the newer 24-70mm f/4 being the lens of choice for bundles in the U.S. as well.

FWIW, I tested my 6D with the 24-70mm f/2.8 II, the 24-70mm f/4, and the f/2.8 Tamron when I bought my current f/2.8 copy. In my limited testing at the store, the f/2.8 had faster and very accurate AF with the 6D. Of course, that was by no means a thorough evaluation. Other with significant experience using both lenses with the same camera can elaborate further in this direction.

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On the flip side, with the -3 EV center point, you might get more keepers in low light with the 6D than anything else Canon sells (including the 1DX).  I've found its low-light focusing to be just plain spectacular.

How do you define 'low light'?  For example, the difference between shooting at -2 EV and-3 EV could mean 1/15 s, f/2.8, ISO 51200 vs. 102400.  Neither is very usable from an IQ standpoint.  What most people call 'low light' is generally substantially brighter than either spec.

I agree that "works well in low light" or similar phrases have a rather imprecise meaning. I thought that Canon's spec on the center point is rather more precise than that, center AF point sensitivity down to EV -3 (at 73ºF/23ºC, ISO 100), which for example would be an 8-min exposure at f/8 or 1-min at f/2.8. Perhaps familiarity with night photography might help envisioning what level of available light would call for such an exposure (considerations on what constitute an adequate exposure aside).

As a side note, I can report using live view AF in the 6D for night landscape shots of 16-min at f/8, ISO 100 (EV -4). AF is rather slow and requires judicious use when choosing your subject. I wouldn't use the viewfinder in those scenarios, as I've found it too dim and small. I haven't heard/read anything pointing out that other cameras wouldn't do as well as the 6D is these circumstances. But I've personally witnessed other photographers resorting to MF quicker than me in these situations (technique and preference may play a role as well).

7
Software & Accessories / Re: Arca Swiss Z and Safety stops
« on: December 06, 2013, 11:29:33 PM »
Now, the question is do I go for a new C-11 or do I go for a blemished or demo C-12? Personally I think it makes more sense to use the C 12 and be future proof. In my case they would put on whatever I choose and purchase.

I know you're asking for dlleno's opinion, but see the report on my positive experience using the C-12 clamp. I'd heard about lever clamps being affected by slight changes in the geometry of the plates, but I'm surprised that RRS' can't be adjusted. In any case, I've only used knob clamps. They're a bit slower to use, but you know for sure when they're tight and it's very easy to make quick adjustments as you slide the plate or rail while keeping some friction.

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Software & Accessories / Re: Arca Swiss Z and Safety stops
« on: December 06, 2013, 11:18:05 PM »
dlleno, your reasonings behind AS' "motives" for locking their clamps make sense. We'll see how things play out in the market. I do hope that they go back and include an offering with their single decker clamp. I have to say that the quality of their double decker clamp is quite nice (just as the for the rest of the Z1), but it just doesn't fit the needs of a number of us very well.

As for my handle, it's a silly thing. About 10 years ago, a bunch of my buddies were figuring out handles for gaming after one too many drinks. For fun we were using some random handle generator, which oddly enough kept suggesting vegetables and uncommon adjectives. I'm of fair skin, bad physical shape, and given to get lost in thought, hence Pensive Tomato. It just stuck and I kept using it for other things as well.

9
Software & Accessories / Re: Arca Swiss Z and Safety stops
« on: December 06, 2013, 04:35:51 PM »
dlleno, it's good that a number of us hold Wimberley in high regard. Thanks for reminding me about them using the C-11 in their modified Z1 offering. I prefer the wider grooves of the C-12 over the C-11, and I assume that they are narrower as that's an older model (same look as the C-10). My C-12 is indeed lying tightly on the anti-twist nubs of my Z1 (no play). I secured the main screw using blue loctite, and I tightened the additional small screws as a safety precaution (although I reckon that they're most likely not adding much). sagitariansrock, I'm sure that Wimberley will advise you on the best course of action.

dlleno, I agree with you that AS' suggestion to put a clamp on top of their flat platform head is nonsense. I wonder if they started locking down their heads due to reports of lousy DIY clamp-replacement jobs?? Some new manufacturing process (as when they modified their stud construction)?? I doesn't sound smart to force their new system into everybody.

10
Software & Accessories / Re: Arca Swiss Z and Safety stops
« on: December 06, 2013, 03:20:21 PM »
So I contacted Wimberley regarding the retrofit, and they said they will do it for free: all I have to pay for is the clamp and the return shipping. That's pretty nice of them IMO. They also offered 20% discounts on their demo, blemished and last model, which are all perfectly acceptable to me functionally. I wonder which I should pick...

I also noticed that my new Kirk L-plate for 5DIII doesn't fit very nicely in the Arca Swiss clamp. The dovetail on the Kirk is quite blunt and the dovetail on the Arca Swiss is rather sharp. So I am just going to wait for my C-10 to arrive- then a quick check to see if I like the knob and then, off goes my Z1 for it's new clamp :)


I'm glad to hear about the Wimberley offering. I contacted their customer service once before, and they stroke me as good people to do business with. Regarding clamp models, keep in mind that the C-10 is discontinued, the C-12 is the current model and what I've had for almost a couple of years (http://www.tripodhead.com/products/qr-clamps-main.cfm). I can attest that the C-12 works fine with Kirk L-plates for the 6D and 7D.

You seem to already be on the Wimberley track, but you mentioned liking the lever system. RRS has a lever clamp that also has anti-twist groves. I ignore if they will retrofit your Z1, but a quick phone call can help (they have great customer service too).

11
I was surprised to find that this thread is still going! I don't know how much is there to say about the 6D AF capabilities, sure it is the most limited (crippled if you will) overall AF system of Canon's current FF offerings. As many have said, you gotta try it and see if it fits your applications. There are plenty of scenarios underlining its limitations --right tool for the right job after all.

I agree that product differentiation played into decisions on what AF system to have in the 6D. I'm happy with the Canon system. So I'm positively surprised that the 6D can be had in the current US market for less than $1500. If we talk about price, then let's look at the cameras as a whole. The 6D offers IQ, ISO, and other features comparable to Canon FF cameras that are substantially more expensive. Of course, one can always ask for more , but provided it fits your needs, IMHO the 6D gives great value.

12
Software & Accessories / Re: Arca Swiss Z and Safety stops
« on: December 04, 2013, 07:09:18 PM »
What wimberly does it take that OFF and put their clamp directly onto the stud, which takes advantage of the anti-twist nubs present in the AS stud.

Kudos to Wimberley keep up the good work!

That's exactly what I did when I fitted mine with their clamp. Wimberley includes instructions online to that effect too. Of course, that was an easy do-it-yourself job before AS decided -as reported- to use some strong glue.

13
Software & Accessories / Re: Arca Swiss Z and Safety stops
« on: December 04, 2013, 04:10:10 PM »
OP, that might indeed be the best bet!

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Software & Accessories / Re: Arca Swiss Z and Safety stops
« on: December 04, 2013, 11:45:22 AM »
I'm still trying to find out why AS produced a whole line of new geometry stuff, and why one would want to live with the double-decker clamp unless there was a critical need to use the proprietary new geometry.

That's beyond me as well. I read some place that the new system was supposed to provide AS with new possibilities, perhaps related to the rails for their view cameras?? Now I do find it funny that the company that produced a geometry standard emulated by others is moving in other directions.

15
Software & Accessories / Re: Arca Swiss Z and Safety stops
« on: December 04, 2013, 11:13:09 AM »
Best of luck with the conversion! Let us know how it goes. You should have good options for the clamp once you get the AS one out. I used the Wimberley as I could readily get it at a local store instead of ordering from RRS (the Z1 is not my primary head, so I wasn't as picky).

RRS does provide options to your heart's content. dlleno, RRS' panning clamp does look attractive. I just keep telling myself that I'm doing fine with my geared head and leveling base, although a compact top panning solution has been tempting me for over a year  ;D

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