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Old 21st of January 2008 (Mon)   #1
BSBXTi
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Default Kenko 1.5 TC

This has probably been brought up before, but I searched and couldn't find anything, so here is my question: I would like to know how well this teleconverter work with the canon 400mm 5.6. I know about the loss of autofocus and how you loose a stop of light. I'm just interested in how the image quailty holds up. There are times when I want to get a pictular bird in frame without cropping so heavily!

Thanks,

Brenton
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Old 21st of January 2008 (Mon)   #2
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Default Re: Kenko 1.5 TC

I don't have the 400mm 5.6 but I must say I don't care for the I/Q when attached to my 70-200 f2.8. I haven't mounted it in a year. I am picky and I don't believe mine is the Pro version but I will probably never use it again. My $.02
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Old 21st of January 2008 (Mon)   #3
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Default Re: Kenko 1.5 TC

Interesting! thanks Spooks!
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Old 23rd of January 2008 (Wed)   #4
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Default Re: Kenko 1.5 TC

Beware that the Kenko 1.5 TC( as oppose to the 1.4 TC) MAYBE unsuitable for a FF camera.

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Old 23rd of January 2008 (Wed)   #5
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Default Re: Kenko 1.5 TC

Get the 1.4x not the 1.5x - difference in IQ.
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Old 23rd of January 2008 (Wed)   #6
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Default Re: Kenko 1.5 TC

Haven't tested it on a 400 5.6 but I've mated it to my 100-400 and it still AF's nicely, hunts slightly if the light really dims. I picked up the Pro version which is supposed to have better optics than the standard, it also doesn't seem to report on either my 100-400 or 70-200. I didn't notice any significant IQ loss on my 70-200 f4 but then again I wasn't pixel peeping to extremes.
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Old 23rd of January 2008 (Wed)   #7
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Default Re: Kenko 1.5 TC

I have all three Kenkos: 1.4x Pro DG (black), 1.4x Pro (white), 1.5x DG (black). The "Pro" units are only very slightly better optically than the 1.5x. The 1.5x is very similar to the black Tamron 1.4x "F" model, which is also very good. IMO the 1.5x is a very good TC, and you can get them used (sometimes) at a bargain price.
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Old 23rd of January 2008 (Wed)   #8
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Default Re: Kenko 1.5 TC

I love my 1.5x, but I have the 100-400. As stated above you still get AF with it.
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Old 24th of April 2008 (Thu)   #9
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Default Re: Kenko 1.5 TC

WIll the kenko pro 1.4 autofocus on the 400 5.6 (i assume the 1.5 will AF on the prime if it does on the 100-400)?
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Old 24th of April 2008 (Thu)   #10
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Default Re: Kenko 1.5 TC

Quote:
Originally Posted by wallybud View Post
WIll the kenko pro 1.4 autofocus on the 400 5.6 (i assume the 1.5 will AF on the prime if it does on the 100-400)?
The 40D is really picky, more so than its siblings, when going beyond f5.6 (with pins taped). It's hit and miss: some get it to work, others don't. I wouldn't count on it.
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Old 24th of April 2008 (Thu)   #11
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Default Re: Kenko 1.5 TC

so IF i consider it...I should just go for best IQ in a 1.4tc and then if its a hit keep it, if not back to amazon it goes?
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Old 24th of April 2008 (Thu)   #12
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Default Re: Kenko 1.5 TC

Quote:
Originally Posted by wallybud View Post
so IF i consider it...I should just go for best IQ in a 1.4tc and then if its a hit keep it, if not back to amazon it goes?
Hard to say. I don't get AF with my 40D + 100-400 IS + 1.4x TC set up. I do get it with my 20D.
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Old 24th of April 2008 (Thu)   #13
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Default Re: Kenko 1.5 TC

well Ive heard mixed things likeee...

a non reporting tc will do the same "damage" to the motor as taping the pins on a reporting tc. even though there seems to be no record of anything happening to a lens motor du to taping the pins(that i can find) Its just "assumed that its harmful" Id only be using it to GET THE SHOT if i need the reach....soo i assume your talking about having the pins taped on your 20d and 40d??
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Old 24th of April 2008 (Thu)   #14
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Default Re: Kenko 1.5 TC

Quote:
Originally Posted by wallybud View Post
well Ive heard mixed things likeee...

a non reporting tc will do the same "damage" to the motor as taping the pins on a reporting tc. even though there seems to be no record of anything happening to a lens motor du to taping the pins(that i can find) Its just "assumed that its harmful" Id only be using it to GET THE SHOT if i need the reach....soo i assume your talking about having the pins taped on your 20d and 40d??
I generally keep the pins taped on my TCs. But that's just my preference.
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Old 24th of April 2008 (Thu)   #15
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Default Re: Kenko 1.5 TC

ok sounds good...ill keep my fingers crossed...thanks a lot!
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