August 20, 2014, 06:26:10 PM

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Messages - kaihp

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31
1D X Sample Images / Re: Any Thing shot with a 1Dx
« on: May 28, 2014, 09:35:21 PM »
This place is definitely on my future travel plans.

I checked the website but didn't see any flyers for Photography specifically, the arrangement you had was with an external 3rd Party ??

Edward,

Unfortunately, the photo courses are not mentioned on the English language part. The Swedish version is here:
http://www.nordensark.se/fotokurser/ (try run it through Google translate)

Here's the PDF for the August weekend course:
http://www.nordensark.se/assets/pdf/Pdf-fotokurserna/Toms-fotokurs-15-17-aug-2014.pdf


32
I would probably consider a 1Dx over my 5D3 for a very long time. Keep my current lenses, maybe except for the 17-40/4L (now that the 16-35/4L IS is coming).

I'm lusting for a 85mm with a 1.2-1.4 aperture, but that's a separate topic.
Oh, and at some point I'd try a TS-E. But that would be "new" money.

33
1D X Sample Images / Re: Any Thing shot with a 1Dx
« on: May 26, 2014, 12:54:09 AM »
Did you go on your own or participate in their photo course with Tom Svensson?
I attended the course. That way you get a lot closer to the animals and you have access to them ouside of regular working hours. It's worth every cent.

Thanks. I'll definitely look into it.

34
1D X Sample Images / Re: Any Thing shot with a 1Dx
« on: May 25, 2014, 09:57:53 PM »
Who has the prettiest eyes in the land??


Beautiful, Eldar!

I wasn't aware of Nordens Ark, but with 200km to Oslo and 120km north of Gothenburg this could be worth a weekend trip. Did you go on your own or participate in their photo course with Tom Svensson?

The August weekend would be possible for me, but the price is ... well, Scandinavian!

35
Lenses / Re: Sigma 50mm Art 1.4 Focusing problems
« on: May 24, 2014, 09:34:46 PM »
The USB Dock are not going to help as there is no any new firmware available yet.
The regular adjustments you can do in camera body.
And more complicated staff like adjustments per AF points you can not do with the dock anyway.
And I still believe that new lens should be adjusted and calibrated at the factory. ;)
Maybe I'm an old school guy ;)

The dock can do adjustments at four different subject distances. You cannot do that with the in-body AFMA.

So in this case, yes, you are a bit old-school. Nothing wrong with that, though - I like to shoot in M over Tv and Av modes, for example  ;D

36
My guess is that Canon will retain the 82mm filter size, and upgrade the next 70-200/2.8L to 82mm as well.
In this way, the f72.8L "holy trinity" series (16-35, 24-70, 70-200) all use 82mm filters, whereas the f/4L mid-range series uses 77mm filters.
Both the 70-200/4 lenses have 67mm filter threads

Really? :o That just goes to show how long time has passed since I sold my f/4L and moved to the f/2.8L  :D

And I cannot see why would Canon want to upgrade its 70-200/2.8 II anytime soon. That lens is a gem (awesome, heavy and pricey :D ).

I'm not suggesting that it isn't a gem, nor that it will be updated soon. But it might fit, that's all I'm saying. :)

37
My guess is that Canon will retain the 82mm filter size, and upgrade the next 70-200/2.8L to 82mm as well.
In this way, the f72.8L "holy trinity" series (16-35, 24-70, 70-200) all use 82mm filters, whereas the f/4L mid-range series uses 77mm filters.

38
1D X Sample Images / Re: Any Thing shot with a 1Dx
« on: May 23, 2014, 02:02:27 AM »
That is one great image, even by your standards Edward.

Like I (and several others on CR) have said a couple of times, you have to make a book. A big one, where you tell all these stories and give advice on travel, guiding, equipment etc. And share your phenomenal images in high quality print!

I hereby preorder 10 copies!

+3 (preorders  :P )

39
Lenses / Re: Sigma 50mm Art 1.4 Focusing problems
« on: May 23, 2014, 01:58:22 AM »
After 4 copies of Sigma I'm a bit disappointed.
It's a gorgeous piece of glass but needs adjustments.
All copies are front focusing from the beginning and needs +13 or +17 depends on bodies.
So I decided to return and wait a bit longer.
Really don't think new lens should be adjusted at all !!!

Please share your experience with this lens.


Are those adjustments consistent, or do you need to change the AFMA from time to time, that's the real question to ask yourself. We have two forum members who have had to return their 50A lenses to Sigma because they couldn't focus reliably. Sure, 13-17 is a lot, but consistent (correct) focus beats inconsistent focus every time.

Please have a look at the http://www.canonrumors.com/forum/index.php?topic=20723.0 thread.

40
I recently discovered on taobao that Benro now also sells filters - specifically also 10-stop ND filters. Since ND1000 filters can help give some interesting effects, I decided to purchase first a 77m and a 82mm filter.

I bought the "SD" (Super Digital) filters. Inspired by Bryan Carnathan's article about 10-stop filters I decided to do a quick test of the filters. As I had previously purchased a 3-stop Tiffen 82m filter (82ND9) I decided to test that also for reference.

Since I don't have an "official" reference color plate, I searched around and downloaded and printed this target: http://photojoes.org/colorchecker.jpg on a laser printer and taped it to a door. Since the printing and my two Osram table lamps used for illumination are likely to give a color cast, so I used the gray boxes to adjust the color temperature for each picture.

(I should say that I'm very much still learning about color temperatures, so I could have done the adjustments incorrectly. If so, please let me know and I'll be happy to update/correct things.)

I chose a deep DOF (f/8) to ensure that I wasn't getting hurt by creases in the paper and non-planarity issues from the taping. Also, since I'm not sure of the lamp filament type, I shot at 0.5sec exposure so reduce or avoid any flicker issues. The 0.5sec, f/8, ISO 100 gave standard exposure with the two lamps.

I'm showing 5 shots, all adjusted to the same (theoretical) in-camera exposure. They have been run through DPP for color temperature adjustment and rescaling to 1200 x 800 px, nothing else.

The camera (5D3) was (obviously) mounted on a tripod (concrete floor), live view was used for initial focus and the lens was then switched to MF. IS was off. Silent shutter and a remote (wireless) trigger was used.

All shots taken at f/8, ISO 100.
1) Control shot, 24-70/2.8L Mk II @ 70mm, 0.5sec.
2) Tiffen ND0.9, 24-70/2.8L Mk II @ 70mm, 4sec.
3) Benro ND10, 24-70/2.8L Mk II @ 70mm, 480sec.
4) Control shot, 70-200/2.8L II @ 200 mm, 0.5sec.
5) Benro ND10, 70-200/2.8L II @ 200 mm, 480sec.

So what are my conclusions so far?
Like Bryan, I find that the Tiffen gives a really bad color cast and much reduced contract. Sharpness seems OK, though. Cost is USD136, according to their website
The Benro filters look quite good with colors very close to the control picture (after correction) and little or no sharpness lost. I'm quite happy with what I see here, especially with the price paid: RMB485-600 (USD88-96) .

Comments, suggestions and improvements/corrections to methodology / design of test are welcome.

41
We just got back a damaged pelican case at work.... Air Canada ran a forklift through it. Fortunately, they hit the box with the tools, not the one with the 60Ghz spectrum analyzer.....

 :o Jeheezuz, forklift ramming a 60GHz spectrum analyzer would have been expensive.

42
I just now received  an update for my 50 Art at the repair shop.

They have ordered the mother board of the lens to replace. I can guarantee, as an old consumer electronics rep guy, they have NO idea what's wrong, and decided to switch out all the electronics and cross their fingers. It's also cheaper to replace the whole board, than to find a single component that might act up, very tricky to find.

I returned mine yesterday. Sigma called me today and said they would just replace it with a new lens. It took them 10 minutes of testing to determine that it was totally sick.

I think these two reports are (relatively) good signs - on Eldar's copy Sigma is able to immediately reproduce the errors and "declare it sick".

In both cases, I seriously doubt that the service shop have the debugging tools to determine why the lenses are exhibiting these errors. For that, they most likely will have to ship them back to the factory or R&D. I seriously hope that they will ship them back (to R&D) for analysis, instead of just scrapping them locally.

43
Btw, when you guys post a working it non working 50 Art, can you please share which body you are using it on, and what sorts of values you have your afma set too?

I have two buddies with 50 Art, one using 1dx and one using a 6d and the one using the 1dx has hm the same issues I and Eldar has, but the one with the 6d it seems to work fine.

First thing I will do when I get it back is to test it in the 5d2 for a while, I hope it's not a 1dx issue.

Good point, Viggo.

If I recall correctly, wickedwombat is shooting with a 5D3 (his lens is OK), and Eldar has used both a 1Dx and a 5D3 (both have problems with his 50A, it seems).


44
1D X Sample Images / Re: Any Thing shot with a 1Dx
« on: May 18, 2014, 02:33:41 AM »
Timbavati Sth Africa

1Dx 400f/2.8 II @ f/2.8 & 1/500th ISO200

Wow, that leopard looks like it's lounging deliberately there for you to take beauty photos of it! :D
Just gorgeous, Edward.

45
And when it misses it still locks on the focus point you use, so you don't know until you review the image on the screen that it missed. It doesn't hunt at all, it locks fast, just in the way wrong spot.


I know nothing about AF algorithms etc, but this seems odd. Wouldn't the camera do several Phase-Detect rounds to assure that focus is achieved? Initial PD-AF to determine focus direction and distance, and then at least a follow-up to confirm that focus is achieved? I recall Roger Cicala writing about this on his blog some time ago (a search reveals this was in July-August 2012).

Yeah, modern-style AF is closed-loop, so the camera should confirm the focus. And yet, it doesn't change away from the incorrect focus setting. This would indicate that the lens thinks it's in the position where it's supposed to be, and yet, it isn't. Wombat is probably right: some physical/electrical part failure seems likely.

Oh, and gratullerer med 200 års dagen til Norge (selvom det var i går) til alle Nordmenn her i tråden :).

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