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tc20+tc20

Started Dec 4, 2011 | Discussions thread

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pcm81

Forum Member • Posts: 66

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tc20+tc20

Dec 4, 2011

I fess up, i am an engineer, not an artist... as such I am curious from scientific point: what happens if you attach TC20 to TC20 to a lens, say 70-200VR2...

Theoretically you should get 280-800mm f/11.2 zoom lens...

Will it work?
Will it focus? It has to still focus manually at some distance...
Will IQ be crap or just a bit worse than 70-200 + TC20?

Any one working for a camera store and can try this out?
Thanks

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Post (hide subjects)	Posted by	When
tc20+tc20	pcm81	Dec 4, 2011
Re: tc20+tc20	mironv	Dec 5, 2011
Re: tc20+tc20	pcm81	Dec 5, 2011
Re: tc20+tc20	mironv	Dec 5, 2011
Re: tc20+tc20	pcm81	Dec 5, 2011
Re: tc20+tc20	Bhimaprasad Maiti	Dec 5, 2011
Re: tc20+tc20	pcm81	Dec 5, 2011
Re: tc20+tc20	pcm81	Dec 5, 2011
Re: tc20+tc20	Guidenet	Dec 5, 2011
G lenses are a pain for this	Marianne Oelund	Dec 5, 2011
Marianne, TC-20E stack just fine...	Joseph S Wisniewski	Dec 11, 2011
Not necessarily	Marianne Oelund	Dec 21, 2011
Re: tc20+tc20	Bjorn_L	Dec 5, 2011
Re: tc20+tc20	pcm81	Dec 6, 2011
Re: tc20+tc20	nkarasev	Dec 6, 2011
Re: tc20+tc20	pcm81	Dec 6, 2011
Re: tc20+tc20	henne	Dec 6, 2011
Re: tc20+tc20	jamesdak	Feb 27, 2012
Re: tc20+tc20	nkarasev	Dec 6, 2011
Re: tc20+tc20	Cenk	Dec 6, 2011
Re: tc20+tc20	henne	Dec 6, 2011
TC20+TC20 = 4x magnification	Bob GB	Dec 6, 2011
Re: TC20+TC20 = 4x magnification	mironv	Dec 6, 2011
Re: TC20+TC20 = 4x magnification	Bob GB	Dec 7, 2011
Re: TC20+TC20 = 4x magnification	mironv	Dec 7, 2011
Re: TC20+TC20 = 4x magnification	pcm81	Dec 10, 2011
Check that link again	Leonard Migliore	Dec 10, 2011
Re: TC20+TC20 = 4x magnification	nkarasev	Dec 11, 2011
Re: TC20+TC20 = 4x magnification	pcm81	Dec 11, 2011
Re: TC20+TC20 = 4x magnification	larrywilson	Dec 11, 2011
Re: TC20+TC20 = 4x magnification	pcm81	Dec 11, 2011
Rude for rude...	Joseph S Wisniewski	Dec 11, 2011
The myth of the DX "sweet spot"...	Joseph S Wisniewski	Dec 11, 2011
Re: The myth of the DX "sweet spot"...	noirdesir	Dec 15, 2011
Performs poorly, both in experience and in theory...	Joseph S Wisniewski	Dec 11, 2011
Re: Performs poorly, both in experience and in theory...	pcm81	Dec 11, 2011
you want seriously weird results that will happen	Mike H	Dec 12, 2011
Re: Performs poorly, both in experience and in theory...	nkarasev	Dec 12, 2011
Re: Performs poorly, both in experience and in theory...	pcm81	Dec 13, 2011
Re: Performs poorly, both in experience and in theory...	henne	Dec 13, 2011
Re: Performs poorly, both in experience and in theory...	nkarasev	Dec 13, 2011
Re: Performs poorly, both in experience and in theory...	larrywilson	Dec 22, 2011
Re: tc20+tc20	nelsonal	Dec 12, 2011

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