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Tamron 70-300USD, 100-400APO, DT 55-300, etc...

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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 Topic: Tamron 70-300USD, 100-400APO, DT 55-300, etc...
    Posted: 05 August 2016 at 23:20
Size comparisons from left to right in the first picture

Minolta AF 100-400mm F4.5-6.7 APO 840 g
Tamron SP AF 70-300mm 4-5.6 Di USD 765 g
Minolta AF 75-300mm F4.5-5.6 "Big Beercan" 865 g
Minolta AF 70-210mm F4 "Beercan" 695 g
Sony DT 55-300mm F4.5-5.6 SAM 460 g
Minolta AF 100-300mm F4.5-5.6 APO 435 g

Fully retracted with hoods stored


Fully extended with hoods installed


Test chart comparison at 100, 200, 300, 400, and 600 mm.

Tested on a Sony SLT-A65V on a tripod with Steady Shot off, manually focused using a 24" 1920x1080 monitor, IR remote for shutter. You might notice these don't look as sharp as the pictures posted in previous 100-300 APO thread which were taken on the SLT-A58K.

100 mm Wide Open Center


100 mm Wide Open Top Left


100 mm Wide Open Bottom Right


200 mm f/5.6 Center


200 mm f/5.6 Top Left


200 mm f/5.6 Bottom Right


300 mm f/5.6 Center


300 mm f/5.6 Top Left


300 mm f/5.6 Bottom Right


Edited by QuietOC - 07 August 2016 at 18:16
Sony A68 A77II A6000 A7II LA-EA3 LA-EA4 MC-11
Minolta Maxxum 600si
Pentax Q7 5-15 15-45/2.8
 



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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: 05 August 2016 at 23:23
400 mm photos with 300 mm zooms use the Kenko DGX 1.4X teleconverter.
600 mm photo with the 100-400 APO uses the Kenko DGX 1.4X teleconverter.
600 mm photos with the 300 mm zooms use the Kenko DGX 2X teleconverter.

400 mm f/8 Center


400 mm f/8 Top Left


400 mm f/8 Bottom Right


600 mm f/11 Center


600 mm f/11 Top Left


600 mm f/11 Bottom Right
Sony A68 A77II A6000 A7II LA-EA3 LA-EA4 MC-11
Minolta Maxxum 600si
Pentax Q7 5-15 15-45/2.8
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Miranda F View Drop Down
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Post Options Post Options   Quote Miranda F Quote  Post ReplyReply Direct Link To This Post Posted: 07 August 2016 at 09:08
Thanks for the test, QUietOC. Some interessting results there.

Firstly, at 100mm the diffrerence between the PF of the 70-210 and the CA of the Tamron 70-300 is most marked, though this seems to reverse at the longest end.

Your copy of the Minolta 75-300 seems to be better than mine - mine shows very significant CA against a bright background at full aperture, though lessnes a lot by f11.

The SOny 55-300 does seems to be sharpest of the lot, though only a little more than the Tamron which is still good, and is only let down by the CA at longer focal lengths. I presume you have compensation switched off (or you're using raw)? I guess this CA would be corrected with in-camerra jpegs; it would be interesting to know how well.

The 100-400 seems to work well with the TCs, doesn't it?
At what distance did you carry out the tests, and was that the same with the TCs fitted?
Miranda F & Sensorex, Sony A58, Nex-6, Dynax 4, 5, 60, 500si/600si/700si/800si, various Sony & Minolta lenses, several Tamrons, lots of MF primes and *far* too many old film cameras . . .
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Pirate View Drop Down
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Post Options Post Options   Quote Pirate Quote  Post ReplyReply Direct Link To This Post Posted: 07 August 2016 at 13:52
Ahoy!

I see 2 lenses missing, though one of them is pretty hard to find in *A-Mount:

Sigma AF 100-300/4 EX DG (IF) APO
*Tokina AT-X 100-300/4 AF-II (gold band) (AF 340)

Your comparison tests are however very interesting so thanks for the time and effort in compiling it which I would think ought to be put into some sort of Dyxum lens test archive.

The other observations are that all bar one are full frame lenses and the camera used is APS-C. I would think that the results may not be as accurate had the test been done with a full frame camera. Would that be a valid point?

Edited by Pirate - 07 August 2016 at 13:55
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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: 07 August 2016 at 16:53
These are the lenses I have. I don't have 100-300/4s or any of the G lenses. Those are really in another size/weight/cost class except for maybe the 70-300G/G2. I don't have a full-frame digital camera. The results are valid for the APS-C crop area. The Tamron MTF curves at 70 mm looks like it falls off rapidly beyond the APS-C region. It us too bad we don't have longer APS-C lenses. The 55-300 is a very nice cheap lens.

I should measure the distances and report those. I just keep the test chart the same apparant size, and it is printed on a 13"x19" paper. The 100 mm shots are just beyond 1.5 meters, some of the lenses couldn't focus on the chart at 70 mm. The 600 mm shots are much farther away.

Edited by QuietOC - 07 August 2016 at 18:20
Sony A68 A77II A6000 A7II LA-EA3 LA-EA4 MC-11
Minolta Maxxum 600si
Pentax Q7 5-15 15-45/2.8
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Miranda F View Drop Down
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Post Options Post Options   Quote Miranda F Quote  Post ReplyReply Direct Link To This Post Posted: 08 August 2016 at 12:49
Ah, right. I usually do tests at similar sizes/distances for the same reason as you. I used to check CA and PF on a particular cell-phone mast near where I used to work, which represented bird/tree/sky images well, and I suspect some of the results may be a bit different from the closer tests. Basically, at their longest focal length, all the older telephoto lenses I tried showed lots of CA but minimal PF (assuming I have correctly distinguished these) at full aperture, reaching a minimum at typically f8-f11.
Miranda F & Sensorex, Sony A58, Nex-6, Dynax 4, 5, 60, 500si/600si/700si/800si, various Sony & Minolta lenses, several Tamrons, lots of MF primes and *far* too many old film cameras . . .
 



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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: 08 August 2016 at 13:03
I haven't found a good candidate for an outdoor test chart yet. The brick school gym wall I've used is very low contrast. The lighting also varies a lot. I have yet to see any consistent difference between tests at different distances. I have thought before I found some, but later testing has always disproved it.
Sony A68 A77II A6000 A7II LA-EA3 LA-EA4 MC-11
Minolta Maxxum 600si
Pentax Q7 5-15 15-45/2.8
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Miranda F View Drop Down
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Post Options Post Options   Quote Miranda F Quote  Post ReplyReply Direct Link To This Post Posted: 09 August 2016 at 09:58
I guess it depends on what you are most interested in finding. For me it was CA/PF on small subjects at fairly long distances (distant birds, eg buzzards) against a bright sky background, and as I said, cellphone masts proved perfect for that, revealing any chromatic aberration, veiling, resolution, and colour bias (the masts are all grey).

I'm still not sure why people are so interested in corner resolution, though. The only time I stress the lens resolution heavily is when I'm cropping heavily for lack of reach, and unless my aim is pretty poor, this is usually near the centre!
Miranda F & Sensorex, Sony A58, Nex-6, Dynax 4, 5, 60, 500si/600si/700si/800si, various Sony & Minolta lenses, several Tamrons, lots of MF primes and *far* too many old film cameras . . .
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