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Sony 28-75mm f:2.8 SAM

Discussion in 'Sony Chat' started by SqueamishOssifrage, Apr 13, 2016.

  1. SqueamishOssifrage

    SqueamishOssifrage Well-Known Member

    Does anyone have one of these, or has used one of these? I am toying with the idea of getting a Sony Alpha 7II as a 'bridge' between a pocket-able small sensor job, and the full outfit (two A850s + > 20 lenses.:eek: ). I know it is not brilliant optically, but my current 24-70mm f:2.8 is about 10 times the size of the A7II, and the 28-75mm is small and light, even with the necessary LA-EA3 adapter. The Tamron equivalent is cheaper, but would need the larger, heavier, LA-EA4 adapter.

    My specific query is - does the SAM also give automatic manual override of AF straight from the focus ring, as with SSM, or does the camera have to be put into MF first?

    Ta everso!
  2. swanseadave

    swanseadave Well-Known Member

  3. nimbus

    nimbus Well-Known Member

    The Minolta lens definitely doesn't have automatic manual override, which the op is looking for.

    Another option might be to consider an A65, which is much lower in cost than the proposed camera.
  4. Dorset_Mike

    Dorset_Mike Grumpy Old Fart

    The earlier Minolta 28-70 version is rated higher in the Dyxum reviews (4.78), the one on Ebay linked above is the Konica Minolta 28-75 version (rated 4.45) which Dyxum rate below the Sony 28-75(rated 4.61).

    The Minolta one on Ebay seems to go for around £350+

    Having compared the Sony and Tamron the similarities make me suspect that the Sony is quite possibly a badged Tamron with in lens AF being about the only difference, the weight is 585gm against the Tamron 510 and about 1mm longer, which could be down to the AF motor, number of elements etc is the same, minor differences in min focus distance and magnification.

    Wouldn't be the first time Sony (and Minolta before them) badged Tamrons sometimes with various levels of enhancement, coatings and AF speed, if this is a badge job then the AF motor is the obvious enhancement.

    The major common enhancement Sony add is a big price hike!
    Last edited: Apr 13, 2016
  5. nimbus

    nimbus Well-Known Member

    ^I seem to recall that Sony have a stake in Tamron.

    Also I did once handle the Sony version and certainly the one I looked at was made in Japan, the Tamron is made in China (as was the Konica-Minolta 28-75 D).
  6. SqueamishOssifrage

    SqueamishOssifrage Well-Known Member

    Thanks all for your responses. I actually already have the Minolta version - but it lives on my Dynax 7, which is actually the camera it was designed for. In terms of the optical train, and focus and zoom positioning, all three lenses are the same, although I wonder if the Tamron has different types of 'doped' glass, as they show a lot of alphabet soup after the name.

    As far as the place of manufacture is concerned, the rules are fairly sloppy. I suspect that Sony get the major assemblies from Tamron in China, and then assemble the lens with their SAM system in Japan.

    Anyway, as for as answering my question - you're all fired. Get your P45 from Personnel immediately, and you will be escorted from the building. :D:D
  7. nimbus

    nimbus Well-Known Member

    I claim re-instatement. The Sony lens does not support manual focus override from the focus ring, information gleaned from the Photozone test report.
  8. SqueamishOssifrage

    SqueamishOssifrage Well-Known Member

    Very many thanks - much appreciated. I read as many reviews as I could find, but didn't find that one. Looked at it just now.

    OK - you're reinstated, but dock yourself a day's pay for being a day late. :p :D

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