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Messages - Lnguyen1203

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1
EOS Bodies - For Stills / Re: Strange Image Artifact on my new 5D III
« on: August 06, 2013, 10:42:23 AM »
I'd guess it is a memory card problem.  Do you see it on every frame or just one frame?  Try reformat the card.  Good luck.

2
Lenses / Re: Superteles: 300 vs 500
« on: July 28, 2013, 10:56:13 AM »
Here is a typical example of what IQ is like for the 300mm f/2.8 II with a series III 2xTC attached. There is no PP on these, no unsharp mask etc, changing of contrast etc. The 5760x3840 full frame is reduced to 1200x800 to have it on screen. There are 100% crops of the centre and the head to show the level of resolution. These are tiny: 210x163 pixels at the centre and 763x619 of the head.

That IQ looks good to me.  TFS.  Loi

3
Lenses / Re: Superteles: 300 vs 500
« on: July 28, 2013, 10:31:57 AM »
Hi All,

I'd been agonizing for months over this choice that's presently being debated here.  I am now comfortable with the 300 2.8 II and 2X III.  I would never argue it's equal to a 600 but it sure is hand holdable and the IQ is nothing to be ashamed of.  This shot is typical of what I get.  It represents a crop of about 1/4 of the original.  I wish that the comments that are made in CR could be accompanied by sample pictures because it's so hard to get a handle on what one person considers acceptable and another does not, but I know that's a tall order.

Jack

6D 300 F2.8 III with X2 III at 500th F25  ISO 1250  (should have dropped the ISO for this bright shot)

Jack, I have shot with both the 300f2.8 IS (version I) + 2X III and the 500f4 II + 2X III.  The latetr IQ is far superior.  I hear the IQ of the 300f2.8 II + 2.0X III is fantastic since the 300f2.8 II shares the same optics with the 500f4 II and 600f4 II.  The issue here is not IQ, but reach and crop.  Everytime you crop, you lose IQ.

Here is an example of a 500f4 II + 2X III, so focal length is 1000-mm, cropped to about 75% of original.

I have seen folks with fantastic photos and IQ with a 450D and Sigma 150-500mm.  Getting close and having good light is key.

Loi

4
At ISO-2500 and 100 percent crop, you will see grain.  More if the image is under exposed.  The 1DX is quite a bit better here, but you will also see grain if underexposed at same ISO.

5
Lenses / Re: Superteles: 300 vs 500
« on: July 27, 2013, 11:31:52 AM »
If you shoot birds, by all means make the trade.  For wildlife, it depends on where you are, 300+1.4x is enough for Africa, but not in other parts of the world depending on what you shoot.  On the other hand, handholding a 500f4 on a boat shooting orca may be tough.

From what you describe, I'd get a crop body to go with the 300 and get the 2X III in case you need even more reach,

I loaned my 300f2.8 IS to my brother after getting  a 500f4 II and never look back.  I just came back from a trip to Africa and the 500 performed great for me from the safari vehicle.   But I don't hike 4-12 miles with it and don't shoot orcas.

Loi

6
EOS Bodies - For Stills / Re: A question for 5dmk3 and 1dx owners
« on: May 25, 2013, 06:06:34 PM »
Depending on what you shoot and light/aperture/DOF, re composing sometimes does not give best results.  When possible, I use the multi controller to move the focus point.

7
Lenses / Re: 600mm lens - tripod
« on: April 20, 2013, 11:45:57 PM »
Agree 100% with Neuro's assessment.  In my view the only regret you will have is not having proper support and watching the big glass hit the ground.  I have used the Wimberley WH-200 and it is very nice.  I personally have the same RRS setup as Neuro describes, with the only difference being that I have the TVC-33S (the S stands for "short") which I prefer for travel convenience.

I'd definitely go with the 3 section' studies, especially this is new to you.  I have no trouble getting my Gitzo 3530LS 3 section on board a plane even a regional aircraft.

8
Lenses / Re: Using two Canon EF 1.4X entenders
« on: February 14, 2013, 09:21:54 AM »
Does anyone here use two 1.4X extenders? If so, can you tape one set of pins and say focus at f8 on a canon ef 400 L f5.6? 

Right now I use a 5d mk iii and I find it quite capable with the extender taped .  I guess I am thinking, when the new firmware comes in the spring, can I feasibly have a 800 f8(f11 reality)? I understand that the image may degrade, and it will be slower, but I was wondering if anyone with 1d series has tried this?

If you use two extenders, the max aperture would be f11, no matter what the camera says.  The 1DX does not AF at f11 when I tried to use the combo: 500f4 II, Kenko 1.4x, extension tube, 2x III.  Swapping the order of the Kenko and the canon 2x gives me an error.

9
Lenses / Re: Canon 2X extender : Mk2 vs Mk3 on 70-200 f/2.8L IS USM
« on: February 14, 2013, 09:12:02 AM »
I had the 2X II and the 2X III with a 300 f2.8 IS, the 2X III is marginally better.  Now I shoot with the 500F4 II and the image with the 2X III is quite good, perhaps as good as the 300f2.8 IS with the 1.4x II, which is quite good.

I have also shot with a borrowed 70-200f2.8 IS with a 2x II and the IQ is quite acceptable.  If you are trying to save money, buying a used 2x II is not a bad idea me think.

10
Lenses / Re: Just bought a new Canon EF 70-300L IS USM lens.
« on: January 27, 2013, 11:54:09 PM »
I am seriously thinking about getting one of the Kenko tele's, but has anyone had any experience using the 2X tele's with this lens?

D

I wouldn't if I were you.  The 2X would rob you 2f stops and now you will ha f11 as the largest aperture.  Meaning you can't use AF.  Also, the 2X should be reserved for the very best, sharpest telephotos.  If you need more reach, the Kenko 1.4x is OK.

11
For birds, nothing compares to the 500f4 II or 600f4 II.  I had the 300f2.8 IS and 1.4x and 2x TCs.  The 1.4x works great, but you lose much details and AF with the 2X.  I now shoot with the 500f4 II and have no regret.  It's very handholdable, only 1 lb more than the 300f2.8 IS. 

12
Lenses / Re: Tips needed for shooting in the cold
« on: January 16, 2013, 12:33:17 AM »
I was in Yellowstone last Feb and Nov, extremely cold temperatures from -10F to 20s and was out for 6-7 hours.  First time I had a T3i with me, second trip had a 1DX.  I went thru 3 batteries on the T3i for may be couple hundreds of pictures.  The 1DX battery had no trouble for the whole day.

Unless it is snowing, there is no issue with condensation when your gear going from warm to cold.  I changed lens with no problem.

Going from cold to warm, I left my gear in a Lowepro 500 bag and let it gradually warmed up to the cabin temp.  We turned off the cabin better when we went out, so when we came back it took time for the cabin to warm up.  I did not put my gear in zip lock bags and it did seem to have any condensation issue.  The point is to avoid bring cold gear to warm room suddenly.

I wore a mitten with inner lining that I could keep warm when not shooting.  This was the ardent part.  And keeping my feet warm.  I wore Baffin boots, the kind people wore to Antarctica :)

Enjoy!

13
Lenses / Re: Just bought a new Canon EF 70-300L IS USM lens.
« on: January 13, 2013, 09:11:08 PM »
Your kestral looks awesome, Lnguyen1203. Is that image cropped? If not, even with the 1.4x on the 70-300L you were able to get awfully close to that bird!

It is crop, but yes, I was fairly close to the bird, may be 15 yards or so.

14
Lenses / Re: Just bought a new Canon EF 70-300L IS USM lens.
« on: January 13, 2013, 08:12:52 PM »
Thanks for availing the results of your experiment, Lnguyen1203, that's really helpful. But just to be clear, the Canon 1.4X III only fits/works on the 70-300L throughout the latter part of the zoom range, right? Zoom it in to far and glass meets glass--ouch--right?

Correct.

15
Lenses / Re: Just bought a new Canon EF 70-300L IS USM lens.
« on: January 13, 2013, 07:04:45 PM »
I did a quick and dirty experiement today to check the exposure compensation.

#1 photo: 5D3, Kenko 1.4X TC, 70-300L, 0 EV, blown highlight is evidence, couldn't be recovered in LR4

#2 photo: same as above with -1 EV compensation, much better, some highlight on the bird is still blown.


These are quick and dirty experiements, so appologize to those of you who are purists :)

and just for kick, I swapped out the Kenko for the Canon 1.4X III.  AF is a bit sluggist and the lens makes a grinding noise.  I put the combo on my 1DX and the same noise persists.  My hummingbirs were not cooperating, so I went out and shot an Amerian Kestrel instead.  The IQ is fantastic, but I guess we know that already.  So, if Canon can fix the AF issue with firmware, this is in fact a viable option.

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