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Stacking 1.4 teleconverters (1 Viewer)
- Thread starter v_cowell
- Start date
David Smith
Warrington Lancs
Vince
I have done this succesfully on my 40D. I found that I had to use 'all focus' points........for some reason it would not lock on if using just centre point.
I haven't tried it on my 7D as yet but should have tried it by Monday.
You should have better success with the 1D MK1V when you get it.
Below is a previous thread which may help.
Dave
Actually-when re-reading your question do you mean 2 1.4s plus a 2X
http://www.birdforum.net/showthread.php?t=190336
I have done this succesfully on my 40D. I found that I had to use 'all focus' points........for some reason it would not lock on if using just centre point.
I haven't tried it on my 7D as yet but should have tried it by Monday.
You should have better success with the 1D MK1V when you get it.
Below is a previous thread which may help.
Dave
Actually-when re-reading your question do you mean 2 1.4s plus a 2X
http://www.birdforum.net/showthread.php?t=190336
Roy C
Occasional bird snapper
I have done this test, same converters and 300/2.8. There was not a lot in it but the 2x just shaded it. One advantage to having a 2x as well as a 1.4x is that you can stack them with the 300/2.8 and get reasonable results in good light (assuming the 2x is not a Canon mkIII).
Roy C
Occasional bird snapper
With two 1.4 x tc you do not add them together, you multiply 1.4 x 1.4 = 1.96 (actually it is 2 as a 1.4x tc is not exactly 1.4x)
So two 1.4x tc on a 300mm = 600mm, the same as a straight 2x
Steve Arlow
Well-known member
I have a question about stacking of converters, looking at my Canon 1.4x would I stack this with another as the elements within the converter seem to prevent such as action. For instance the glass at both ends extend beyond the housing.
Is the stacking only possible using non Canon with a Canon?
many thanks
Is the stacking only possible using non Canon with a Canon?
many thanks
Chris Galvin
Well-known member
Steve,
You need a non-Canon such as a Kenko
You need a non-Canon such as a Kenko
Roy C
Occasional bird snapper
Steve, you can stack a Canon 1.4x tc with a Canon 2x tc providing the 2x is a MKII (2x MkI or the new 2x MkIII will not stack). As already indicated you can stack a non Canon like the Kenko with your 1.4x Canon. There is a way of stacking two Canon 1.4x tc's by putting a 12mm extension tube between them but you would lose focus at infinity.
OBXGuide
Nature Photographer
Well, am I ever glad I stumbled across this thread. I bought another Canon 1.4x TC in order to stack it with the one I already had. Man, I would have been confused when I got around to assembling them had I not read this. Did not realize everyone was using a non-canon TC in order to stack them. Hadn't even looked at it. Just assumed it would work from all the stuff I'd been reading. I happen to have a set of 3 Kenko extension tubes, so maybe I'll be able to do it after all.
BTW, Roy, those are some very nice shots in your gallery
BTW, Roy, those are some very nice shots in your gallery
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Jaff
Registered Member
As my 2x is currently KIA I have been using two stacked 1.4s lately (Canon and Kenko PRO) and the results have been very good, as has been said on a par with the 2x really and generally the AF has been very good too but not quite as reliable as using the 2x. Check out the close-up of the willow warbler on my flickr page for a heavy crop using the two 1.4's. It's been sharpened a little as we all do but that doesn't detract from the fact that the original is still top notch IQ.
Basically if you were in a position where you had a 300mmf2.8 and you couldn't afford a Canon 2x and 1.4x for it or if you had an f4 lens and wanted a lot more reach but a 2x would stop the AF working then two 1.4s, be it a Canon and kenko or two kenko's then they are a very viable alternative IMO.
Basically if you were in a position where you had a 300mmf2.8 and you couldn't afford a Canon 2x and 1.4x for it or if you had an f4 lens and wanted a lot more reach but a 2x would stop the AF working then two 1.4s, be it a Canon and kenko or two kenko's then they are a very viable alternative IMO.
davethebird
Well-known member
Excellent shots of the Willow Warbler with great detail. Can you just confirm the body/lens combination you used as the EXIF data has gone walkabout. Thanks. :t:
Jaff
Registered Member
Yeah I have my flickr account set to withhold the exif data, perhaps you can do me a return favour BTW. Can you at least see what date it was taken? My aim was to include the EXIF when I saved the image so people could see when it was taken rather than me having to manually alter it for every image I upload which is the case if I use save for web.
At any rate it was a 1DMKIII with a 300mmf2.8 IS with Canon and Kenko 1.4's as I said. Really need to get my 2x seen to though! |^|
davethebird
Well-known member
It was taken on April 7th 2011 according to the description to the right of the picture. This fills automatically from the EXIF data.
I have the same 1.4 TCs but with a 300 f4 so I rarely use them stacked on my 7D. Perhaps I'll give it another go. :t:
Joe52
Well-known member
Here's a shot of The International Space Station by Romy Ocon using a 7D + EF 400 2.8 IS + Canon 2x II + Sigma 2x + Sigma 1.4x, at a distance of 348 km, it's not bad at all.
http://romyocon.wordpress.com/2011/04/17/iss-over-manila-april-18-2011/
http://romyocon.wordpress.com/2011/04/17/iss-over-manila-april-18-2011/
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