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TC Guide II 200/2.8 + 1.4X 1.7X 2X Tests

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Eclipse View Drop Down
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Post Options Post Options   Quote Eclipse Quote  Post ReplyReply Direct Link To This Post Posted: 07 May 2008 at 14:51
ugonjwa? That's a new one on me....

I have found that quacks generally do get the best of deals like that....or the people who sell painkillers anyway

On the more cheerful side, if you do ever get round to getting them done, a mate of mine has had two hips and a knee replaced, and she's swimming and horse riding and everything... I can't keep up with her!
 



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Post Options Post Options   Quote Dinostrich Quote  Post ReplyReply Direct Link To This Post Posted: 07 May 2008 at 15:28
ugonjwa = swahili for unwell etc. - great language for multipurpose words. A result of living in Kenya for a decade and many business trips for another decade.

The received thinking is that they have got hips off to a fine art but more probelmatical for knees so waiting for them to get better at them

"On the more cheerful side, if you do ever get round to getting them done, a mate of mine has had two hips and a knee replaced, and she's swimming and horse riding and everything... I can't keep up with her!"

Reminds me of a joke but perhaps left unrecorded.

Enjoy the fine shooting weather - while it lasts !
I shot some film yesterday. I was told last night that film was dead so today I shot some more.
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Post Options Post Options   Quote Eclipse Quote  Post ReplyReply Direct Link To This Post Posted: 08 May 2008 at 13:20
Must ask the mate about her knee.
As she is very small, she has to have special joints. They were thinking of putting a child's joint in her shoulder when she had that done, but I think they used an adult one in the end. Shoulders would seem to be more complicated even than knees.
A friend of a friend was passing the factory that made a joint that she'd had fitted, and decided to drop in. They showed her round, and were very interested in how it was working, though a bit shocked to hear she did long-distance hill-walking on it, as they said it wasn't designed to cope with that sort of thing. It's still going strong, though!
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Post Options Post Options   Quote pegelli Quote  Post ReplyReply Direct Link To This Post Posted: 21 January 2009 at 21:05
Has anyone done a head-head comparison between a Kenko Pro 300 1.4x and a genuine Minolta or Sony APO 1.4x ?

I have the 200/2.8 and the Kenko and am wondering if the upgrade is worth it. The Kenko is not chipped so SSS is not as effective and exif is wrong, but I'm more thinking about an IQ comparison.
Mind the bandwidth of others, don't link pictures larger then 1024 wide or 960 pix high, see here
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Post Options Post Options   Quote eccles Quote  Post ReplyReply Direct Link To This Post Posted: 08 March 2009 at 21:45
@Pegelli, I don't have the Minolta/Sony TC but I do have a Kenko Pro 300 1.4x that I thought was pretty good until I tried a borrowed Sigma EX APO 1.4x. The Sigma TC gave noticeably sharper results when used with my Sigma 100-300 F4 EX lens, so much so that I immediately went out and bought one. Therefore, I would expect a Minolta or Sony TC to give better results than the Kenko on your 200mm/2.8.
The obvious advantage with the Kenko is that it'll work with many more lenses than the Sony/Minolta TC, but I wouldn't hesitate to get the real thing for the 200/2.8, even if it's the only lens that you have that it'll work with.
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Post Options Post Options   Quote accady Quote  Post ReplyReply Direct Link To This Post Posted: 16 March 2009 at 17:23

Great TC comparison, as valuable as the main guide. Thanks for doing this, eccl.
Maybe it's just me but looking at the 2x comparison, I think that the Vivitar is excellent (if not as good as the APO). Does anybody know the relationship between different brands of the MC7 converters (Kenko, Tamron, Vivitar, Phoenix, etc)?
As far as I know, the Kenko and Tamron are the same thing but how about Vivitar, Phoenix and others. Also, is there any 2x APO vs Tamron MC7 test available?
 



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Post Options Post Options   Quote eccl Quote  Post ReplyReply Direct Link To This Post Posted: 16 March 2009 at 17:42
I believe Kenko and/or Tamron make the majority of 1.4/2X teleconverters. They all look the same (size/dimension) and the only difference in the lettering.
Assuming all the MC7 2X came from the factory then the difference in image quality is probably due to sample variation.
Sorry I do not have a Tamron MC7 only Tamron SP 2X which is the same as Kenko Pro 300 2X
16/2.8 24/2.8 28/2 28/2.8 35/2 50/1.4 50/1.7 50/2.8 85/1.4 100/2 100/2.8 180/3.5 200/2.8 300/4 400/5.6 500/7.2 500/8

Zoom, TC and other lenses too numerous to list!
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Post Options Post Options   Quote accady Quote  Post ReplyReply Direct Link To This Post Posted: 16 March 2009 at 18:09
Originally posted by eccl eccl wrote:

Assuming all the MC7 2X came from the factory then the difference in image quality is probably due to sample variation.


I totally agree on sample variation. At one moment I had 2 Tamron MC7 and even on 6MP(7D) there were significant differences in sharpness and colors (probably due to different coatings). I had several chances to get a 2x Vivitar but always thought I could get similar results by uprezing. Seeing your sample crops, I think is well worth trying one.


Edited by accady - 17 March 2009 at 02:12
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Post Options Post Options   Quote Remko Quote  Post ReplyReply Direct Link To This Post Posted: 18 June 2010 at 12:28
I thought the Minolta TC's are matched to only certain specific (expensive) Minolta lenses.

I wonder how TC's perform on the less expensive Minolta lenses.
I only have experience with an Soligor MC7 2x and Beercan wide open. That was stunning. Pic is somewhere posted on dyxum.
Minolta / Dynax / Sony Alpha / NEX
A creative mind.
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Post Options Post Options   Quote cruiser Quote  Post ReplyReply Direct Link To This Post Posted: 26 June 2010 at 09:05
It would be interesting to see a comparison of the 100-400mm Minolta APO and the Sigma 70-200mm f2.8 with Sigma 2x teleconverter.
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Post Options Post Options   Quote tbroadley Quote  Post ReplyReply Direct Link To This Post Posted: 19 May 2013 at 16:14
In anticipation of an upcoming trip and having some weight considerations, I bought the Kanko 1.4x DGX and 2.0 duo. I have just finished some test shots wih the 1.4x on the 70-400mm and the only drawback I find is that it vignettes at the longer zoom ranges i.e 200-400mm. Center sharpness is better than what I expected and AF is pretty reasonable all things being considered. The edges tend to drop off but within my expectations. Obviously light has alot to do with the vignetting, I was shooting a lot at sunset so I was stressing it. it also worked well on my 28-135 and it surprised by keeping AF and pretty resonable at that. In general for $150, it is worth it for thise times whenyou need some extended range. Next up will be the 70-300g. Haven't got to the 2.0x yet but my expectations are that will suffer in comparison. I will at some point try both on the 200mm/2.8.

Tim
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Post Options Post Options   Quote bull drinkwater Quote  Post ReplyReply Direct Link To This Post Posted: 23 January 2014 at 10:48
I have both the 1.4 and 2.0convertwers and pair them with the 200mm and 70-200mm apo G hs.with either one the results are great. with the 70-200mm I don't get auto focus, but the apo coinverters won't stack.i have stacked the 2xapo and a 1.4 vivitar and still gotten good results . auto focus with the 200 and manual with the 70-200.however I do get auto focus with the 70-200 and the vivitar 1.4.
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Post Options Post Options   Quote bull drinkwater Quote  Post ReplyReply Direct Link To This Post Posted: 23 January 2014 at 10:49
Originally posted by bull drinkwater bull drinkwater wrote:

I have both the 1.4 and 2.0 apo convertwers and pair them with the 200mm and 70-200mm apo G hs.with either one the results are great. with the 70-200mm I don't get auto focus, but the apo coinverters won't stack.i have stacked the 2xapo and a 1.4 vivitar and still gotten good results . auto focus with the 200 and manual with the 70-200.however I do get auto focus with the 70-200 and the vivitar 1.4.
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Post Options Post Options   Quote bull drinkwater Quote  Post ReplyReply Direct Link To This Post Posted: 23 January 2014 at 10:54
this is one of those cases where you have to get out there and shoot about 100 photos at different settings and set back at the end of the day and examine the closely.
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