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A-Mount Teleconverters Guide

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craigchinohills View Drop Down
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Post Options Post Options   Quote craigchinohills Quote  Post ReplyReply Direct Link To This Post Posted: 06 February 2006 at 21:36
I think there was a thread over on Photo.net with that lens and some questions but I'm in no hurry.
 



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Post Options Post Options   Quote H_K_F Quote  Post ReplyReply Direct Link To This Post Posted: 07 February 2006 at 02:20
Thank you so much for the teleconvertor informations.

I had a Minolta 1.4X APO(D) version, there is hardly any optical loss noticeable, excellent TC. I was hesitate to get a 2X convertor... (D) version would be prefered, since I can also use it on both 70-200 SSM and a 300 f2.8; well, I hesitate a little too long and it's out of stock now... : (

I could still buy a non-(D) version in HK, and limited to use on the 300 f2.8 only. I wonder if there is any other differences in terms of optical and focusing performance? Also, a non-(D) version is US$100 cheaper...
Dynax 7,9,A2,5D
Sony A700,A900,A99
17-35G, 24-70Z, 28-70G, 70-200G, 35G, 50D, 85G, 100D, 300/2.8G, 600G
NEX5,5R,A7Rii
10-18, 16, 18-200, 24-70Z, 35/2.8Z, 55/1.8Z, 85/1.8Z, 70-200/4
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Post Options Post Options   Quote X-R-M Quote  Post ReplyReply Direct Link To This Post Posted: 07 February 2006 at 02:40
ECCL, thank you for your response.

Yes, I would like to see some samples.
I was thinking about TC(s) for my 200/2.8 which is my longest lens and sometimes I could use longer optics.
I would love to get those Minolta APO TC's, as I prefer original equipment, but lately I spend too much for my photo stuff, that I doubt my wife and my budget would allowed me to get one of those APO - they are really expensive.
   Anyway I would like to know which TC I should prefer in case if I can get one for reasonable price.
   Is Kenko preferred over Tamron or vice versa, or they are identical?
   What about build quality?
   Kenko comes from Tokina group and I like Tokina build quality.
   I also wonder how 200/2.8 image quality with TC 1.4x and 2x compares to 300/4.0 and 400/4.5(at 5.6).Do you have any experience with that?

   I would appreciate if you can post some comparison images (I am sure I am not only interested here), but there is no rush, so post whenever you find some time.

   It will be great having your great compendium with samples in one thread.

Thank you for your efford ECCL.
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Post Options Post Options   Quote eccl Quote  Post ReplyReply Direct Link To This Post Posted: 07 February 2006 at 17:38
Originally posted by H_K_F H_K_F wrote:

Thank you so much for the teleconvertor informations.

I had a Minolta 1.4X APO(D) version, there is hardly any optical loss noticeable, excellent TC. I was hesitate to get a 2X convertor... (D) version would be prefered, since I can also use it on both 70-200 SSM and a 300 f2.8; well, I hesitate a little too long and it's out of stock now... : (

I could still buy a non-(D) version in HK, and limited to use on the 300 f2.8 only. I wonder if there is any other differences in terms of optical and focusing performance? Also, a non-(D) version is US$100 cheaper...


I believe all the Minolta APO teleconverters has the same optical design. The difference is just the difference gearing in II version and (D) function in the latest (D) version to support SSM lenses.

If you already have the 70-200 SSM, you should get the APO 2X (D) version. However, if you can find a 2X APO at good price and you don't mind manual focus then go for it. I bought both the APO 1.4X and APO 2X TC about the same price as one APO 2X (D) that was several years ago when the prices are much more reasonable.

One other option is to look at the Kenko Pro 300 and Tamron SP 2X, they are not as good as the Minolta APO but they are only about 1/3 the price and the quality is at least 70-75% of the APO TC in the center and 60-70% in the corner.

eccl
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Post Options Post Options   Quote eccl Quote  Post ReplyReply Direct Link To This Post Posted: 07 February 2006 at 17:43
Originally posted by X-R-M X-R-M wrote:

ECCL, thank you for your response.

Yes, I would like to see some samples.
I was thinking about TC(s) for my 200/2.8 which is my longest lens and sometimes I could use longer optics.
I would love to get those Minolta APO TC's, as I prefer original equipment, but lately I spend too much for my photo stuff, that I doubt my wife and my budget would allowed me to get one of those APO - they are really expensive.
   Anyway I would like to know which TC I should prefer in case if I can get one for reasonable price.
   Is Kenko preferred over Tamron or vice versa, or they are identical?
   What about build quality?
   Kenko comes from Tokina group and I like Tokina build quality.
   I also wonder how 200/2.8 image quality with TC 1.4x and 2x compares to 300/4.0 and 400/4.5(at 5.6).Do you have any experience with that?

   I would appreciate if you can post some comparison images (I am sure I am not only interested here), but there is no rush, so post whenever you find some time.

   It will be great having your great compendium with samples in one thread.

Thank you for your efford ECCL.


If you are considering regular (white color) Kenko Pro 300 and Tamron SP, they are the same TC just different name (Probably both made by Kenko) so just pick the one that is less expensive.

If you are getting the latest Pro 300 DG (black color) then it is only available in Kenko version.

I'll post some comparison shots as soon as I have the chance.

eccl





Edited by eccl - 07 February 2006 at 17:48
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Post Options Post Options   Quote apchoo Quote  Post ReplyReply Direct Link To This Post Posted: 07 February 2006 at 22:24
Hi there,
Great work on the topic of TCs!

One issue that was briefly mentioned in this thread is the reporting the correct f/stop with a TC mounted. I have an 80-200mm f2.8 APO (black) and a Kenko Teleplus Pro 300 (white, non-DG version), and just like you say, my 7D reports f2.8 when it really is f4.

Which TCs that you know of correctly reports the resulting f/stop in EXIF? A friend who uses the Tamron SP 1.4X & 2X TCs (white, supposedly identical to the Kenko 300s) with his 80-200mm f2.8 APO HS (white) says that he gets the correct f/stop on his 7D. Does that suggest that the Tamron and Kenko TCs aren't that similar?
 



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Post Options Post Options   Quote eccl Quote  Post ReplyReply Direct Link To This Post Posted: 07 February 2006 at 22:32
I have both the Tamron SP 1.4X (white) and SP 2X (white)and only the 2X reports the correct F stop. 1.4X doesn't.

Can you check with your friend to confirm his Tamron 1.4X SP TC (white) reports the correct aperture.

Thanks,
eccl



Edited by eccl - 07 February 2006 at 22:33
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Post Options Post Options   Quote H_K_F Quote  Post ReplyReply Direct Link To This Post Posted: 08 February 2006 at 16:52
Hi ECCL,

Thank you so much for your insight. In this case, I would buy the non-(D) version then. I seldom use a TC for 70-200 range anyway, it is most probaly use with the 300 only. I don't want to wait for the Sony version..., and can save some bucks. : )

BTW, the Minolta 1.4X APO is so good, I hardly take it off from the 300.

Thanks again.
Dynax 7,9,A2,5D
Sony A700,A900,A99
17-35G, 24-70Z, 28-70G, 70-200G, 35G, 50D, 85G, 100D, 300/2.8G, 600G
NEX5,5R,A7Rii
10-18, 16, 18-200, 24-70Z, 35/2.8Z, 55/1.8Z, 85/1.8Z, 70-200/4
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Post Options Post Options   Quote PLLD69 Quote  Post ReplyReply Direct Link To This Post Posted: 08 February 2006 at 18:11
Fab piece of work eccl. Of course unfortunately for me the area where you were unable to provide comprehensive detail was with the Sigma EX's. I have a 1.4EX (non DG) and may be forced into running it with a Tokina 80-200 f2.8ATX (not the Pro version, the one before that). Gheil mentioned using the 2x Sigma with a Tokina 80-200 does anyone have any information on a) compatibility and b) optical results if compatible. Many thanks.
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Post Options Post Options   Quote JST1 Quote  Post ReplyReply Direct Link To This Post Posted: 08 February 2006 at 22:12
Verification please, the APO 1.4x will not work with the 70-200 2.8 SSM? Or is it that AF wil not work with that converter?
Much appreciation.
JST- a99, a77II, a900, a700, RX1, 14 mm 2.8 tamron, 85 mm 1.4 ZA, 100 2.8 Minolta Macro, 135 mm 1.8 ZA, 70-200 2.8 G SSM, Minolta 300 2.8 G, Teleconverter 2X Minolta, 150mm-600mm Tamron.
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Post Options Post Options   Quote brettania Quote  Post ReplyReply Direct Link To This Post Posted: 08 February 2006 at 22:25
Originally posted by JST1 JST1 wrote:

Verification please, the APO 1.4x will not work with the 70-200 2.8 SSM? Or is it that AF wil not work with that converter?
Much appreciation.

Minolta has made three APO converters. The first is just designated as APO Teleconverter, the second has II in its name, and the third says APO D.
Only the last will AF with the 70-200 SSM. I have successfully used the II in MF, but have not tried the "original" model although I believe it would also work in MF.
I will try to verify that later today.
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Post Options Post Options   Quote JST1 Quote  Post ReplyReply Direct Link To This Post Posted: 08 February 2006 at 22:31
The 1.4x is backordered. I was hoping we could use it on the 70-210.
The 2x will do well on the 400mm. I can't wait to try it out.
Thnks for your help.
JST- a99, a77II, a900, a700, RX1, 14 mm 2.8 tamron, 85 mm 1.4 ZA, 100 2.8 Minolta Macro, 135 mm 1.8 ZA, 70-200 2.8 G SSM, Minolta 300 2.8 G, Teleconverter 2X Minolta, 150mm-600mm Tamron.
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Post Options Post Options   Quote eccl Quote  Post ReplyReply Direct Link To This Post Posted: 09 February 2006 at 04:05
As promised 100-300 APO @300mm vs 100-400 APO @ 300mm vs 200G + 1.4X comparison:

Original image:


100% crop wide open center:


100% crop wide open corner:


100% crop stop down center:


100% crop stop down corner:

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Post Options Post Options   Quote ab012 Quote  Post ReplyReply Direct Link To This Post Posted: 09 February 2006 at 04:12
very interseting stuff eccl!

that 100-400 center performance (even though it is at 6.3) is suprisingly good!!

Bernard

fun fun fun
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