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Which teleconverter?

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crysania View Drop Down
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Post Options Post Options   Quote crysania Quote  Post ReplyReply Direct Link To This Post Topic: Which teleconverter?
    Posted: 03 February 2021 at 17:45
Hi folks. You've been really helpful with the questions I've had in the past, so I appreciate it. I'm debating picking up a teleconverter. I don't have use for one all the time, but there are some times I wish I had more reach than 200mm. But OH BOY do they confuse me (and I read the bit on the site about teleconverters and I'm still confused).

I have a Sony a77ii and use a Minolta 80-200mm f/2.8 APO G lens with it. What teleconverters would work for this combination? I would have thought the Minolta APO ones but then I'm reading they don't actually work together.

Any help would be greatly appreciated!
 



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QuietOC View Drop Down
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Post Options Post Options   Quote QuietOC Quote  Post ReplyReply Direct Link To This Post Posted: 03 February 2021 at 17:54
Originally posted by FAQ FAQ wrote:

How about teleconverter for Minolta 80-200/2.8 APO G?

Generic or Kenko Pro 300/Tamron SP will fit.

I'd recommend any MC7 2X Kenko model. An older 5-pin version should be fine. I have 8-pin Tamron-F and Kenko ones for sale.

Edited by QuietOC - 03 February 2021 at 17:58
Sony A7RIV NEX-5T HVL-F45RM LA-EA5 Metabones-IV Sigma MC-11 Yongnuo EF-E II TLT ROKR MD-NEX KR-NEX DA-NEX
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Pentax Q7 5-15 15-45/2.8 8.5/1.9 11.5/9 AF-P/Q
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crysania View Drop Down
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Post Options Post Options   Quote crysania Quote  Post ReplyReply Direct Link To This Post Posted: 03 February 2021 at 18:01
Yeah I saw that but I wasn't sure if those were the only ones or there were others out there. It was a lot of info on that site and only one snippet about this lens!
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amrep View Drop Down
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Post Options Post Options   Quote amrep Quote  Post ReplyReply Direct Link To This Post Posted: 03 February 2021 at 18:09
The Kenko Teleplus 1.4X DGX (for A-mount) is probably the best option. This is the most recent edition for A-mount and it will work on most A-mount lenses.

There are many variants of the Teleplus teleconverters. Some are labeled Vivitar, Tamron etc. The older Kenko Mx-AF 2X Teleplus MC7 are now plenty and cheap second hand. If you donít mind some reduced resolution (typical for most 2X teleconverters) this is an option. It may not be much better than cropping in post processing, but can be useful for manual focus video (because video resolution is low anyway).

Edited by amrep - 03 February 2021 at 18:13
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Post Options Post Options   Quote QuietOC Quote  Post ReplyReply Direct Link To This Post Posted: 03 February 2021 at 18:20
I've never used the 80-200G, but I generally find the 2X MC7 teleconverters sharper than any of the MC4 teleconverters.

They all should be sharp in the center wide-open, but the MC4's just have more issues away from the center. The 3X teleconverters are very good optically too. I think for 1.4X there is a big advantage for first-party teleconverter that stick into the rear of the lens. Kenko has since released a MC5 1.4X teleconverter (not for A-mount) that is supposedly a bit better than the MC4's.
Sony A7RIV NEX-5T HVL-F45RM LA-EA5 Metabones-IV Sigma MC-11 Yongnuo EF-E II TLT ROKR MD-NEX KR-NEX DA-NEX
Minolta Maxxum 600si
Pentax Q7 5-15 15-45/2.8 8.5/1.9 11.5/9 AF-P/Q
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momech View Drop Down
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Post Options Post Options   Quote momech Quote  Post ReplyReply Direct Link To This Post Posted: 03 February 2021 at 18:33
I have an old Minolta 2X APO II TC which works fine with my Minolta APO 300/2.8, etc. Never used the 80-200 so maybe something's different with this lens?
Also, the Sony A mount TCs work fine with my older Minolta lenses as well.
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amrep View Drop Down
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Post Options Post Options   Quote amrep Quote  Post ReplyReply Direct Link To This Post Posted: 03 February 2021 at 18:51
Generic teleconverters are notoriously difficult to rate. There are obviously some copy-to-copy variation. I addition each type may match some lenses well and others not so well. Ideally there should be made measurements with about 10 different copies of the same TC-type on 10 copies of each lens. Of course no such research have taken place. The most thorough test I have seen is this, but even this should be taken with a grain of salt:
https://www.traumflieger.de/objektivtest/open_test/telekonverter/overview.php

Most good copies of the newer Kenko TC models seems to be OK. But I also have one old Kenko 1.5X SHQ and I think it is inferior, I avoid using it.
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Basil View Drop Down
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Post Options Post Options   Quote Basil Quote  Post ReplyReply Direct Link To This Post Posted: 03 February 2021 at 19:04
Originally posted by amrep amrep wrote:

The Kenko Teleplus 1.4X DGX (for A-mount) is probably the best option. This is the most recent edition for A-mount and it will work on most A-mount lenses.


I have the same camera and lens combination, and use a Tamron branded version of this teleconverter when I don't want to carry a larger lens around all day. It works very well for what I need it to do.
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Post Options Post Options   Quote amrep Quote  Post ReplyReply Direct Link To This Post Posted: 03 February 2021 at 19:21
In Japan, most Kenko Mx-AF 2X MC7 on offer now seems to go for about 2000-2500Y (USD 20-25). Definitely the cheapest of the still useful TCs.
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