November 28, 2014, 12:03:38 PM

Author Topic: Stacked TCs - 1.4x III + 12mm Extension Tube + 2x III  (Read 14949 times)

AlanF

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Re: Stacked TCs - 1.4x III + 12mm Extension Tube + 2x III
« Reply #30 on: January 28, 2014, 11:35:44 AM »
postscript
I just tried focussing on closer subjects. The AF on 5DIII and 70D both failed, but the liveview on the 70D was spot on. So, perhaps this is the reason why I thought previously the tube didn't work? It makes me really glad I bought the 70D and sold the 7D because the latter had very poor AF on the 300/2.8 + 2xTC whereas the 70D is very good, and it has amazing liveview focussing.
5D III, 70D, Powershot SX50, 300/2.8 II, 1.4xTC III, 2xTC III, 70-200/4 IS, 24-105, 15-85, Sigma 10-20, Tamron 150-600, EOS-M, 18-55, f/2 22.

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Re: Stacked TCs - 1.4x III + 12mm Extension Tube + 2x III
« Reply #30 on: January 28, 2014, 11:35:44 AM »

Jack Douglas

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Re: Stacked TCs - 1.4x III + 12mm Extension Tube + 2x III
« Reply #31 on: January 28, 2014, 03:44:26 PM »
When I get my 12 mm back I'll try again but I'm not impressed with this although there might be a circumstance where I'd try it.  ISO 4000  Had to manually focus (auto was spotty) and it was tricky hand held.

Jack
6D  24-70 F4  70-200 F2.8 II  300 F2.8 II  1.4X III  2X III

Eldar

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Re: Stacked TCs - 1.4x III + 12mm Extension Tube + 2x III
« Reply #32 on: January 29, 2014, 05:48:23 AM »
I finally got around to try this. I mounted the 600 w. the extenders and extension tube on a RRS TVC-34L tripod with RRS PG-02 pano-gimbal head.

First observation was how shaky it was. I sold my Wiberley gimbal-2 head when I got the RRS head, so I cannot make a direct comparison. But I made some shots with the 400/2.8L II and 2xIII extender, mounted on the 7D, which is equivalent to 1280mm and as I recall, that was much more stable.

But, second observation, the sharpness and my ability to focus was so limited that I do not view this as a realistic alternative for practical use. I will wait and see what the 7DII will be able to do.
5DIII, 1DX, 8-15/4L, 16-35 f4L IS, 24-70/2.8L II, 70-200/2.8L IS II, 70-300/4-5.6L IS, 200-400/4L IS 1.4x, Zeiss 15/2.8, 17/4L TS-E, Zeiss 21/2.8, 24/3.5L TS-E II, Zeiss 35/1.4, Zeiss Otus 55/1.4, Zeiss Otus 85/1.4, 100/2.8L IS Macro, Zeiss 135/2, 600/4L IS II

mackguyver

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Re: Stacked TCs - 1.4x III + 12mm Extension Tube + 2x III
« Reply #33 on: January 29, 2014, 09:49:24 AM »
Alan, Jack, & Eldar, thank you for your experiments, and as Eldar says, I'm sure it's not practical for normal use.  I still think there's some value for it in rare situations and look forward to giving it a try.  And yes, if the 7DII turns out to be half as awesome as we all hope, I'll consider going back to a crop sensor...

Skulker

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Re: Stacked TCs - 1.4x III + 12mm Extension Tube + 2x III
« Reply #34 on: January 29, 2014, 01:10:35 PM »
postscript
I just tried focussing on closer subjects. The AF on 5DIII and 70D both failed, but the liveview on the 70D was spot on. So, perhaps this is the reason why I thought previously the tube didn't work? It makes me really glad I bought the 70D and sold the 7D because the latter had very poor AF on the 300/2.8 + 2xTC whereas the 70D is very good, and it has amazing liveview focussing.

I never got on with the 300/2.8 + 2xtc on the 7d. It was not workable for me, just too slow for wild life, but it should always focus using normal AF. I used to turn off the search for focus option. Or it would take ages to focus. But its great on the 5d3 or 1dx. In fact its probably my fav lens on the 1Dx and very often hand held at that.

But I don't think I would ever use the stacked converters for wild life. The IS is best turned off and the whole set up has to be well supported. Due to the lack of light you are going to need such slow shutter speeds its not really what you want for fast moving wild life in poor light. And that's always what I seem to be taking photo's of.  :)
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Caps18

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Re: Stacked TCs - 1.4x III + 12mm Extension Tube + 2x III
« Reply #35 on: January 29, 2014, 08:58:02 PM »
Wildlife is tricky, especially if you use live-view and digitally focus with the AF button.  Or manually focus by zooming in and pixel peeping (why isn't there a 50-100x zoom).  I only have the 25mm tube, so it had to be that one, but I haven't come up with a reason to have a 840mm eq lens for non-moving objects yet.
5D mark 2, 16-35mm f/2.8, 17mm TS-E f/4, 85mm f/1.8, 300mm f/4 + 1.4x, 580 EX Flash

AlanF

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Re: Stacked TCs - 1.4x III + 12mm Extension Tube + 2x III
« Reply #36 on: January 31, 2014, 09:23:39 AM »
I have only just noticed that TDP has a shot of the moon through a 600mm with stacked extenders.

http://www.the-digital-picture.com/Reviews/Canon-EF-600mm-f-4-L-IS-II-USM-Lens-Review.aspx

5D III, 70D, Powershot SX50, 300/2.8 II, 1.4xTC III, 2xTC III, 70-200/4 IS, 24-105, 15-85, Sigma 10-20, Tamron 150-600, EOS-M, 18-55, f/2 22.

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Re: Stacked TCs - 1.4x III + 12mm Extension Tube + 2x III
« Reply #36 on: January 31, 2014, 09:23:39 AM »

mackguyver

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Re: Stacked TCs - 1.4x III + 12mm Extension Tube + 2x III
« Reply #37 on: January 31, 2014, 09:32:14 AM »
I have only just noticed that TDP has a shot of the moon through a 600mm with stacked extenders.

http://www.the-digital-picture.com/Reviews/Canon-EF-600mm-f-4-L-IS-II-USM-Lens-Review.aspx
Cool find, thanks Alan.

Jack Douglas

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Re: Stacked TCs - 1.4x III + 12mm Extension Tube + 2x III
« Reply #38 on: January 31, 2014, 12:50:28 PM »
AlanF, we've been two pleased customers with the 300 II and both converters.  I'm holding off (still lots to learn and lots to do, with my 6D) on the decision on a second body.  I might have even bought a 1Dx at my wife's urging ;) as my friend has just recently, but boy I don't like the weight.

So, my question for you is how have you found the 70D crop to be with the 300 and extenders 1.4X and 2X.  Another friend has the 70D but he's so busy we haven't had time to get my lenses on his camera. 

We both know that getting beyond 600 would be very useful at times if the negatives are not too great.  I'm still thinking 7DII.  Any thoughts from your recent experiences?

Jack
6D  24-70 F4  70-200 F2.8 II  300 F2.8 II  1.4X III  2X III

AlanF

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Re: Stacked TCs - 1.4x III + 12mm Extension Tube + 2x III
« Reply #39 on: January 31, 2014, 02:55:11 PM »
Jack
The 70D is very good indeed with 300/2.8 II and TCs. I haven't had a chance to use them stacked yet. I don't think stacking is practical for bird photography. With individual TCs, the focussing is fast and accurate, the IQ very good. There is no doubt I am getting better reach than with the 5DIII, but the 5DIII does give slightly crisper and richer images, which makes up for some of the lower reach. DxO PRIME noise reduction without loss of detail is so remarkable that it greatly raises the iso performance of the 70D. Trouble is, the noise reduction takes about 2.5-3 minutes on my MacBook Pro and 11 minutes on my MacBook Air.
5D III, 70D, Powershot SX50, 300/2.8 II, 1.4xTC III, 2xTC III, 70-200/4 IS, 24-105, 15-85, Sigma 10-20, Tamron 150-600, EOS-M, 18-55, f/2 22.

Jack Douglas

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Re: Stacked TCs - 1.4x III + 12mm Extension Tube + 2x III
« Reply #40 on: January 31, 2014, 05:13:47 PM »
Thanks AlanF, in other words a 7DII could prove to be a nice addition to the 6D, having both handy.  I'm really pleased with my new 70-200 F2.8 and I'm guessing that with a 7DII (+_ extender) that might work for BIF??

Plus I have concerns about what I'd be willing to travel with.  South American is in the not too distant future and I worry about the 300.

Jack
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scyrene

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Re: Stacked TCs - 1.4x III + 12mm Extension Tube + 2x III
« Reply #41 on: April 04, 2014, 05:48:45 PM »
Just to say, I received my 2x III today, and had to try stacking. I've always used stacked teleconverters (as long as I've had them), and have had some good results with the 2x II + 1.4x III (+500 f/4 II). I used them plus a Kenko 2x recently again to photograph distant offshore birds (eiders and scoters, common here but they almost never come within half a mile of shore).

These are not good shots but they prove it is possible. The gull washing and man are at 5600mm (500+1.4+2+2+2), and in poor light, manually focused. So sharpness and focus are out of the window - also I had to shoot at ISO 10000 to correctly expose. Still, it proves it's possible. The order was lens-2x II-2xIII-12mm extension tube-1.4x III (I think!). I don't know if order matters with regard to image quality. For scale, the man was nearly 1/4 mile away, on the other side of the lake. Both shots are uncropped, on a 5D3.
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mackguyver

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Re: Stacked TCs - 1.4x III + 12mm Extension Tube + 2x III
« Reply #42 on: April 05, 2014, 11:34:52 PM »
I might have to give my set a shot tomorrow - I've had them for a while but a scenario to use them hasn't presented itself yet...

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Re: Stacked TCs - 1.4x III + 12mm Extension Tube + 2x III
« Reply #42 on: April 05, 2014, 11:34:52 PM »

scyrene

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Re: Stacked TCs - 1.4x III + 12mm Extension Tube + 2x III
« Reply #43 on: April 15, 2014, 08:25:35 PM »
A little update - and a warning! I had the 500 f/4 II with 2x III tc attached, with a Kenko 12mm extension tube behind that, and the 2x II and 1.4x III extenders behind that. I stood the camera upright, lens down (as I often do) on a bench while I fiddled with my bag. The camera fell over (which it sometimes does, and comes to no harm), but it hit the back of the bench and the lens combination just clean sheared in half! Thankfully, the strap stopped the camera falling onto the ground. Predictably, it was the extension tube that had failed - the front part had simply detached. Could have been costly! So be extra careful when mounting big lenses on teleconverters with extension tubes :(
5D mark III, 50D, 300D, EOS-M; Samyang 14mm f/2.8, 24-105L, MP-E, 85L II, 100L macro, 500L IS II, EF-M 18-55; 1.4xIII, 2x III + 2xII extenders; 600EX-RT; EF-M--EF adaptor.
Former lenses include: 70-200L f/4 non-IS, 200L 2.8, 400L 5.6

Jack Douglas

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Re: Stacked TCs - 1.4x III + 12mm Extension Tube + 2x III
« Reply #44 on: April 15, 2014, 11:34:32 PM »
Very good advice.  Obviously the Kenko had me a little worried just balancing on the gimbal and there is detectable "slop".  :-\

Jack
6D  24-70 F4  70-200 F2.8 II  300 F2.8 II  1.4X III  2X III

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Re: Stacked TCs - 1.4x III + 12mm Extension Tube + 2x III
« Reply #44 on: April 15, 2014, 11:34:32 PM »