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Archive 2016 · Stacking TC's

Imagemaster
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p.1 #1 · p.1 #1 · Stacking TC's

Will a 1.4x TC III stack with a 1.4x TC II, and if so, will that combo give better or worse results than a 2x TC?

Jul 16, 2016 at 08:15 PM

Liquidstone
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p.1 #2 · p.1 #2 · Stacking TC's

Nope, they won't stack.

Jul 16, 2016 at 08:45 PM

dgdg
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p.1 #3 · p.1 #3 · Stacking TC's

I've stacked a 1.4 and 2x. Just nred a little spacer. As far as Tony's question. Dunno

Jul 16, 2016 at 09:56 PM

Mike Jacks0n
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p.1 #4 · p.1 #4 · Stacking TC's

Depending on the body and the lens you're using it would likely be best to use the 2x. For example, if you are using a 5D series or 1D series body with an F4 or F2.8 "L" lens I would say the 2x is going to be much better. Don't be afraid of the 2x, adjust the micro focus and get it tuned in and it should be fine.

Jul 16, 2016 at 10:20 PM

riokid
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p.1 #5 · p.1 #5 · Stacking TC's

dgdg wrote:
I've stacked a 1.4 and 2x. Just nred a little spacer. As far as Tony's question. Dunno

David,

No spacer needed if you stack 1.4X III (closer to the body) and 2.0X II. That is the only reason why I am keeping my 2.0X II

Jul 17, 2016 at 12:34 AM

dgdg
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p.1 #6 · p.1 #6 · Stacking TC's

I used the spacer however due to art morris's blog when he had trouble focusing on the sun. Good to know your experiences though for the next time.

riokid wrote:
David,

No spacer needed if you stack 1.4X III (closer to the body) and 2.0X II. That is the only reason why I am keeping my 2.0X II

Jul 17, 2016 at 02:51 AM

RustyBug
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p.1 #7 · p.1 #7 · Stacking TC's

I've stacked two 1.4x's (and 1.4X + 2X), but not the combo Tony is asking about. You typically can't do it when both TC's have protruding elements ... although, I've never tried to use a spacer to accommodate the protrusion.

I do recall someone years ago advocating that a pair of (non-protruding) 1.4X TC's AF'd better than a 2X TC. Never tested it out, so I don't know if that was factual or folklore.

Jul 17, 2016 at 07:14 AM

jcolwell
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p.1 #8 · p.1 #8 · Stacking TC's

RustyBug wrote:
... You typically can't do it when both TC's have protruding elements ...

You can stack Canon Mk I and Mk II Extenders, not Mk III.

You can insert an extension tube between Mk III Extenders. The Canon 12mm Extension Tube reduces MFD on my 500/4L IS from 4.5m to 3.6m, and "infinity focus" is reduced to about 13m (i.e. you can't focus on subjects further away).

Also, you can stack a Kenko Teleplus Pro 300 DG 1.4x TC behind either the 1.4x III or 2x III. I found that this Kenko TC has the same IQ as the Canon 1.4x Extender Mk I, which I owned before going to Mk III extenders.

I compared the 2x III alone vs. the 2x III + Kenko 1.4x in this old thread,

https://www.fredmiranda.com/forum/topic/1278663/1&year=2014#12188170

I found the the 2x III alone provided better IQ when enlarged to match the 2x III + 1.4x TC magnification, than the 2x III + 1.4x TC.

Jul 17, 2016 at 07:28 AM

schlotz
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p.1 #9 · p.1 #9 · Stacking TC's

Also agree, use the 2X but make sure it's ver III which is definitely better than the earlier versions.

Jul 17, 2016 at 08:35 AM

Imagemaster
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p.1 #10 · p.1 #10 · Stacking TC's

Thanks for all the replies so far.

1. I am not interested in stacking a 1.4x to a 2x, and not interested in using a spacer.

2. Since version II of the 1.4x TC does not have a protruding element, I thought it would fit between the body and the 1.4x III, which is why my original question.

3. I already have the 1.4x III, and will probably get the 2x III. I would have opted for a 1.4x II to stack with my 1.4x III, only if performance was as good as adding the bare 2x III, and it was possible to do.

4. This will be on a 300 f2.8 IS version I.

P.S. I also have a Kenko 1.4x TC, which worked extremely well in the past, but have found does not work at all with some newer Canon bodies.

Edited on Jul 17, 2016 at 01:55 PM · View previous versions

Jul 17, 2016 at 09:46 AM

RustyBug
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p.1 #11 · p.1 #11 · Stacking TC's

Imagemaster wrote:
Will a 1.4x TC III stack with a 1.4x TC II, and if so, will that combo give better or worse results than a 2x TC?

Tony,

Your OP said TC III & TC II ... not TC I.

Imagemaster wrote:
2. Since version I of the 1.4x TC does not have a protruding element, I thought it would fit between the body and the 1.4x III, which is why my original question.

Jul 17, 2016 at 01:38 PM

Imagemaster
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p.1 #12 · p.1 #12 · Stacking TC's

RustyBug wrote:
Tony,

Your OP said TC III & TC II ... not TC I.

Yes, I have edited that.

Jul 17, 2016 at 01:57 PM

herion
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p.1 #13 · p.1 #13 · Stacking TC's

Imagemaster wrote:
Will a 1.4x TC III stack with a 1.4x TC II, and if so, will that combo give better or worse results than a 2x TC?

I've stacked two Kenko 1.4x's with my 70-300L - AF was working on the short end, but was somewhat erratic on the far end. IQ was very good (but a bit degraded from no TC or just one TC)

Jul 17, 2016 at 06:02 PM

Imagemaster
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p.1 #14 · p.1 #14 · Stacking TC's

herion wrote:
I've stacked two Kenko 1.4x's with my 70-300L - AF was working on the short end, but was somewhat erratic on the far end. IQ was very good (but a bit degraded from no TC or just one TC)

Imagemaster wrote:
P.S. I also have a Kenko 1.4x TC, which worked extremely well in the past, but have found does not work at all with some newer Canon bodies.

Jul 17, 2016 at 07:20 PM

Abbott Schindl
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p.1 #15 · p.1 #15 · Stacking TC's

While I've not tried it, I wouldn't expect 2 stacked TC1.4s to deliver near the optical quality of a single TC2. The TC1.4 (II) has 5 elements; TC1.4 (III) has 7; TC2 (III) has 9. I'd expect 9 elements to perform better than 14 if for no other reason than there are fewer refracting surfaces involved.

Would you expect something different?

Jul 17, 2016 at 07:38 PM

Imagemaster
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p.1 #16 · p.1 #16 · Stacking TC's

Abbott Schindl wrote:
While I've not tried it, I wouldn't expect 2 stacked TC1.4s to deliver near the optical quality of a single TC2. The TC1.4 (II) has 5 elements; TC1.4 (III) has 7; TC2 (III) has 9. I'd expect 9 elements to perform better than 14 if for no other reason than there are fewer refracting surfaces involved.

Would you expect something different?

Since I have read on this site that a member got better results with two stacked 1.4x TC's than with a single 2x TC, why not?

Jul 17, 2016 at 10:06 PM

Abbott Schindl
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p.1 #17 · p.1 #17 · Stacking TC's

Interesting; I missed that post.

Jul 18, 2016 at 10:26 AM


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