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Quality issues with Minolta AF 28- 135mm F4.0-4.5

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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: 04 April 2018 at 13:41
I've had at least 4 inexpensive copies of the 28-135 and opened at least a couple of them. None were particularly sharp wide-open on an APS-C sensor. None were particularly bad. I've had worse copies of the later zooms and even the 28-85 and original 35-105. My smaller, older, faster Minolta MD 50-135 F3.5 is sharper, so age is not really the issue. The 28 mm wide end is probably why the 28-135 needed to be so huge. Look at the size of the Sony FE 28-135 F4 G OSS. Minolta also had a smaller, earlier MD 35-135 F3.5-4.5--traditional extending front focus, 55 mm filter thread and included a hood!

The 28-135 is fairly easy to work on if you follow the pictures on Pete Ganzel's site. He has a scan of the repair manual too. There are adjustments in the lens, but none are really for alignment issues. Minolta had updated parts for the lens to allow focus shift adjustment.

I would recommend just selling it as is, describing it accurately. There are lots of other lenses to use.

A68 30M 35 50 60M 16-50 16-80 18-55 18-70 18-135 55-200 55-300
A6000 LA-EA1 6.5 16 20 30 50 60 16-50 18-55 55-210
600si: 20 24 28 50 100M 135 24-85 24-105 28-105 35-70 35-105 70-210 75-300 100-200
 



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Sönke Henning View Drop Down
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Post Options Post Options   Quote Sönke Henning Quote  Post ReplyReply Direct Link To This Post Posted: 04 April 2018 at 15:10
What has been said here contradicts my own experience as well as artaphot's findings on sample variation.
artaphot

It can produce TACK sharp images between 40 and 100mm. At 28mm the corners never get really sharp. At 135mm it gets a little softer overall (but still acceptible).
I'm still travelling but if you like please PN me in a week or so to send you proof to my words.

I've used it extensively on the a850 and now on the a99 ii.

Edited by Sönke Henning - 04 April 2018 at 15:25
http://www.caucasus-pictures.blogspot.com
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tullahoma View Drop Down
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Post Options Post Options   Quote tullahoma Quote  Post ReplyReply Direct Link To This Post Posted: 05 April 2018 at 22:31
I agree that you can get very sharp images with the 28-135mm lens. I have the Zeiss 24-70mm f2.8 and 16-35mm f2.8 lenses. The Minolta 28-135mm lens that I use is for all intents and purposes just as sharp as both of the Zeiss lenses and the Zeiss 16-80mm lens which I use on my a77ii for a walk-around because of its range. I use the Minolta as my primary walk-around lens for my a99ii unless I anticipate the need for f2.8 again for its extend focal range. I have the 24, 28, and 35mm-105mm Minolta lenses but prefer the 28-135mm lens.

I will note that both of the Minolta 28-135mm lenses that I have did not focus to infinity when I first got them but that was easily fixed. My first one eventually stopped AF'ing after 100mm which seems to be another common problem.
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WestCoastCannuck View Drop Down
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Post Options Post Options   Quote WestCoastCannuck Quote  Post ReplyReply Direct Link To This Post Posted: 06 April 2018 at 01:21
Sounds like a dud. It is a very complicated design and old now - there are lots of bad copies.

However... IMO it is worth trying to find a good copy. Buy one from here.. from a known member that is willing to give image examples and an honest assessment - that is my suggestion.

I have had three copies.... when I got the first, I was unhappy with the image quality and wondered what all the fuss was about. A second came up locally - and after trying it I snapped it up. It was like night and day the difference. VERY sharp.. all through the range at all settings. Later, I picked up a third copy locally just because the price was good and it looked new - it was also excellent. I sold the first with full disclosure here on Dyxum for about $30 I think.

I don't use it much, preferring the 35-105 (original of course) but not because of any real difference in IQ... I just prefer the OOF rendering of the 35-105. My copies are equally sharp. (35-105 vs 28-135) When I feel I need the wider range and only want one lens - the 28-135 is what I put on with confidence.

I use an A99ii.

Cheers and good luck!

Mike
flickr

A99ii|A77ii|Tam15-30|ZA24-70|M28-135|M35-105|M80-200G|SAL70400G|Σ50 1.4|ZA135|200F2.8HS G|300F2.8HS G|400/4.5|APOii1.4XTC|APOii2XTC
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Cliff View Drop Down
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Post Options Post Options   Quote Cliff Quote  Post ReplyReply Direct Link To This Post Posted: 06 April 2018 at 02:58
Nice lens synopsis Miranda F.

I'd only add that with most of photos today being viewed on screens of 2mp(1080p) or 8mp(4k) of varying sizes at varying distances, there are limits on how many of the frailties of old lenses we see, or virtues of newer glass. That said, flare and veiling do not hide.
ContaxRF, Min7000i, Sony A100, A65, Nex5T, A7ii, A6500. 2 many lenses, mostly ordinary Minolta & 3rd party A, MC/D, other mf, vintage Vivitars & cats, LA-EA2,3,4 E16-50&55-210mm
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jackal2008 View Drop Down
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Post Options Post Options   Quote jackal2008 Quote  Post ReplyReply Direct Link To This Post Posted: 06 April 2018 at 19:58
i might just lucky, but all my minolta metal lens are sharp enough on a55, and with nice color.
they do have problems like glare, CA, etc. my copy of 28-135 is as sharp as 35-105. these two are my general walk around lens.
 



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dbuergi View Drop Down
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Post Options Post Options   Quote dbuergi Quote  Post ReplyReply Direct Link To This Post Posted: 07 April 2018 at 09:46
Hi all,

here is a little update since I was able to do some testing in the morning. The macro mode gives really nice pics and also manual focus on all other lengths provides better pics than AF so this should be the main problem. I also found out that the front element was a bit loose but that was easy to fix.
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djfoxy View Drop Down
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Post Options Post Options   Quote djfoxy Quote  Post ReplyReply Direct Link To This Post Posted: 07 April 2018 at 20:40
In general one can see variations in the beercan lenses.

But I'm pretty sur that QC from Minolta era is far way superior than the ones of today.

I had 2 copies of the beercan 70-210/4. For a reason I ignore the 2nd one had zoom ring going turning the opposite way than beercan lenses, and moreover it had a noticeable yellow color cast.

I own 2 copies of 35-105 and both are perfect.

So as already said it's a matter of "luck" but considering the price of those lenses nowadays it can be easy to pick 2 to 3 copies at once and compare to keep the best one.

One thing that I need to do:
Make my comparison beercan 28-135 VS Sony 28-75/2.8 Sam.

This lens will be very handy for any next body A-mount with hybrid AF ( only A99ii at the moment... Hope for an entry level FF or drop of prices of A99ii )
Minolta: XG1/ D7D/<beercan>135 f2.8/ 35-70 f4/ 35-105/ 70-210 f4/ 100-200 f4.5</beercan>/ 500 f8/ 17-35 f2.8-4/   50 f1.7/   50 & 100 f2.8 macro
Sony: A58/ A77ii / 28-75 f2.8 SAM/ DT 35 f1.8/ 85 f2.8
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djfoxy View Drop Down
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Post Options Post Options   Quote djfoxy Quote  Post ReplyReply Direct Link To This Post Posted: 16 April 2018 at 12:17
I used my 28-135 lens this week-end but didn't MFA it before => eye AF was pretty off focus.

On the other hand manual focus showed me that this lens is pretty sharp indeed.

I'm not much involved in movie recording but ended up making a video with it and:

1- I discovered where was hidden the menu for P/A/S of the movie mode of A77ii    (still learning things out of it)

2- I liked the rendering in aperture mode

Minolta: XG1/ D7D/<beercan>135 f2.8/ 35-70 f4/ 35-105/ 70-210 f4/ 100-200 f4.5</beercan>/ 500 f8/ 17-35 f2.8-4/   50 f1.7/   50 & 100 f2.8 macro
Sony: A58/ A77ii / 28-75 f2.8 SAM/ DT 35 f1.8/ 85 f2.8
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