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Adaptors with old minolta glass

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is.that.a.thing.now View Drop Down
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Post Options Post Options   Quote is.that.a.thing.now Quote  Post ReplyReply Direct Link To This Post Topic: Adaptors with old minolta glass
    Posted: 02 July 2018 at 01:21
Originally posted by neilt3 neilt3 wrote:

Unless you just buy a replacement mirror for the LA-EA4 .   
Sony LA-EA4 replacement mirror on ebay
Also available from any Sony spare parts place .
Unlike a standard SLT mirror that is just removed , a baffle needs to be removed on the LA-EA4 first for the mirror to just slip out .

Still best not to mess your mirror up though !


Oh now that is neat! I managed to get a ton of dirt on mine right after I bought it. This was years ago when they were just released, and those parts weren’t available.

I managed to delicately clean it with a sensor swab, but it still is kinda dirty. I might actually buy that part. Thanks!
 



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Post Options Post Options   Quote neilt3 Quote  Post ReplyReply Direct Link To This Post Posted: 01 July 2018 at 20:55
Originally posted by is.that.a.thing.now is.that.a.thing.now wrote:



One thing to be careful of is keeping that translucent mirror clean. Unlike the LA-EA2, the new EA4 doesn't have a replacable mirror. If you damage/dirt it your are out of luck.




Unless you just buy a replacement mirror for the LA-EA4 .   
Sony LA-EA4 replacement mirror on ebay
Also available from any Sony spare parts place .
Unlike a standard SLT mirror that is just removed , a baffle needs to be removed on the LA-EA4 first for the mirror to just slip out .

Still best not to mess your mirror up though !
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is.that.a.thing.now View Drop Down
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Post Options Post Options   Quote is.that.a.thing.now Quote  Post ReplyReply Direct Link To This Post Posted: 01 July 2018 at 15:38
Originally posted by addy landzaat addy landzaat wrote:

The AF system that is inside the LA-EA4 is old.


I would have considered the the a77 autofocus system to be old.

Either way, considering I was coming from a-mount film bodies and first gen e-mount, it wasn't all that bad.
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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 01 July 2018 at 15:35
Originally posted by is.that.a.thing.now is.that.a.thing.now wrote:

I hear it is just the af motor and focus system ripped out of an a77
You heard wrong - it is the 15 AF point with 3 cross points of the A65 (and the A55). The A77 has 19 AF points of which 11 are of the cross type. The AF system that is inside the LA-EA4 is old.
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Post Options Post Options   Quote is.that.a.thing.now Quote  Post ReplyReply Direct Link To This Post Posted: 01 July 2018 at 15:04
I have been using the a-mount adapters since the NEX-3.

I recommend the LA-EA4 unless ALL your glass is modern SSM stuff (if you spent that much on modern ssm lenses you probably would be shooting with the a99ii anyway. SAM lenses and a crop body might be a different story). It is relatively fast, (I hear it is just the af motor and focus system ripped out of an a77) and can handle any a-mount lens (except xi). The light loss is less than a third of a stop in my experience, and really isn't an issue. It doesn't support all the autofocus gimmicks on the a7 bodies, but it works decently enough. I think it is sort of a legacy thing from before the e-mount bodies had pdaf. The autofocus is just too slow with adapted lenses without it.

One thing to be careful of is keeping that translucent mirror clean. Unlike the LA-EA2, the new EA4 doesn't have a replacable mirror. If you damage/dirt it your are out of luck.

What we really need is a mix of the two adapters. An LA-EA3 w/ the screwdrive motor included.

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Post Options Post Options   Quote thingomy Quote  Post ReplyReply Direct Link To This Post Posted: 29 June 2018 at 14:19
Originally posted by glad2badad glad2badad wrote:


I have the LA-EA4 and when I use it I just move the Manfrotto tripod foot from the camera body to the adapter (there's a mounting screw on the bottom of it). Not ideal, but if you're not switching from the LA-EA4 to a native E-mount lens while in the field it's not a major deal. Just move the tripod foot back to the camera body when you're done.


Fair point, I forgot to mention that detail. I however generally leave the tripod foot on the camera full time, and as such, I would have to move it practically every time I changed lenses.

It's possible that an L-bracket, or certainly a vertical grip could change the shape of things to make it work.

The fact that the adaptor has a mount point on it is great if you are using it exclusively though.



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Post Options Post Options   Quote glad2badad Quote  Post ReplyReply Direct Link To This Post Posted: 29 June 2018 at 13:23
Originally posted by thingomy thingomy wrote:

Update...

I borrowed an LA-EA4 for a few days to test it out with my a7iii.

... <snip> ... but a standard manfrotto tripod foot on the camera blocks the adaptor, meaning it's unusable if you are dealing with a tripod and wanting to change lenses. This point alone is almost a deal breaker for me. ... <snip>

I have the LA-EA4 and when I use it I just move the Manfrotto tripod foot from the camera body to the adapter (there's a mounting screw on the bottom of it). Not ideal, but if you're not switching from the LA-EA4 to a native E-mount lens while in the field it's not a major deal. Just move the tripod foot back to the camera body when you're done.
http://www.misterbsphotography.com, A7II, A77II, A77, A700, Lens ... too many to list. :-)
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Post Options Post Options   Quote thingomy Quote  Post ReplyReply Direct Link To This Post Posted: 29 June 2018 at 11:17
Update...

I borrowed an LA-EA4 for a few days to test it out with my a7iii. I was pleasantly surprised by the responsivity of the focus in terms of tracking -- the tracking continues to work effectively (even if I've lost track of the myriad of different tracking settings, I count at least 4 modes...? no idea which I was using) anyway, the tracking locks onto the subject and focuses whenever one of the tiny cluster of AF sensors are in the right place. I didn't shoot any real subjects with it, but I expect it would be perfectly sufficient for someone wandering around a stage etc.

Focus speed isn't stellar, but its as good as any normal screw drive system.

Relative to the experience with the a700, the tracking is a huge plus, but the tight cluster of points in the centre is a minor negative.

Aperture mechanism and focus engage/disengage noise (and actual AF noise to a lesser extent) is an issue with this setup. (to me, feeling self conscious when in a quiet auditorium and it's 6 inches from my ears) It sounds just as loud as a shutter used to sound -- ie like someone rattling a tin can full of screws. Is this a real problem? maybe? It bugs me.

I emulated a dumb adaptor by slightly unseating both ends of the adaptor, and found that focus peaking and a button assigned to focus magnifier thing still works great leading to quite practical MF.

It would have been nice if the adaptor had an assignable focus hold button on it.

Biggest problem I found was the form factor, while hand holding, the adaptor is very comfortable with my left palm automatically propping the whole setup using it; but a standard manfrotto tripod foot on the camera blocks the adaptor, meaning it's unusable if you are dealing with a tripod and wanting to change lenses. This point alone is almost a deal breaker for me.

Cost is also prohibitive given my specific use case, and I see a dumb fotodiox adaptor in my near future. The LA-EA4 will stay on my "maybe" list for a while though. the LA-EA3 (which I havn't tried) would be a good middle ground for some people, but not helpful in my case.
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Post Options Post Options   Quote Miranda F Quote  Post ReplyReply Direct Link To This Post Posted: 29 June 2018 at 08:21
The noise processing (jpeg in camera or in PP from raw) and the choices you make re detail/smoothness make a lot more difference than the SLT mirror. And remember something is making those chocies even if you aren't.

I agree with others the 100-300APO is a great lens of its kind, but it isn't a low-light lens. If you're heading to the heights in ISO, then IME you're better off with a faster but shorter FL and cropping or using digital zoom.
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Post Options Post Options   Quote pegelli Quote  Post ReplyReply Direct Link To This Post Posted: 28 June 2018 at 22:03
Originally posted by butangmucat butangmucat wrote:



Well the 1/2 stop is ISO 4000 vs ISO 6400, then this does matter.


ISO 4000 is actually 2/3 stop below 6400, not half a stop.

Half a stop would be ISO 4600, but you can't set that on a Sony camera (even changing EV steps to 0.5 still keeps iso values 1/3 stop apart).

But do the test, print off a picture at a reasonable size at ISO 4000 vs. the same scene at ISO 6400. You'll be amazed at how little difference you can actually see that way. In any case it's much less difference than is suggested vs. looking at 1:1 on an LCD screen (also known as pixel peeping), which is (in my mind) not the right way to judge the noise limits of your camera.

Mind the bandwidth of others, don't link pictures larger then 1024 wide or 960 pix high, see here
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Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 28 June 2018 at 19:29
Originally posted by butangmucat butangmucat wrote:


I meant "night and day" more from an end IQ/result stand point: on a sunny day, even with the SLT, I can stop my KM 28-75 down to f8 while still maintaining a reasonably low ISO that guarantees good noise and dynamic range. But for a indoor press release where I was forced to use the 100-300 APO, I am pushing my camera to ISO 6400 because of the SLT, and producing borderline usable images.
That is more due to the lens then the SLT. Without the SLT, you still will be at 5000 ISO - how much better will your picture be? If you change to a f/2.8 lens, you will be at 1600 ISO. As said - reassess which lens you use in which situation.

The half a stop is nice to have, but it simply isn't the biggest problem.
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Post Options Post Options   Quote neilt3 Quote  Post ReplyReply Direct Link To This Post Posted: 28 June 2018 at 09:37
Originally posted by butangmucat butangmucat wrote:

Originally posted by addy landzaat addy landzaat wrote:

Originally posted by butangmucat butangmucat wrote:

It doesn't matter too much if I am carrying my KM 28-75 on a sunny day, but if I was forced to use my 100-300 APO for a indoor press release (as I did today), the half stop is really day and night.
f/2.8 to f/5.6 is two stops on your lens - in comparison the 0.5 stops from the mirror is peanuts. And the difference stays the same - mirror or no mirror. Just get a faster lens.


I meant "night and day" more from an end IQ/result stand point: on a sunny day, even with the SLT, I can stop my KM 28-75 down to f8 while still maintaining a reasonably low ISO that guarantees good noise and dynamic range. But for a indoor press release where I was forced to use the 100-300 APO, I am pushing my camera to ISO 6400 because of the SLT, and producing borderline usable images.


If your in these situations often it sounds like you might want to reasses your lens selection .
I use the 100-300mm APO D when I want a compact , lightweight option for when I'm walking about in the hills .
If the lights low or I know I'll need a higher shutter speed , I use lenses such as a 200mm f/2.8 , the 80-200mm f/2.8 or my 300mm f/4 ( all Minolta) or at a pinch the 70-210mm f/4 .
And that's with an SLT .

You can't have it all ways , if you (and I ) want to use older screw driven lenses on an E mount camera , that's the price you pay .

Other than that , if you changed your system , you may need to change some lenses if your jobs to cover press conferences and news etc.
Maybe the SEL 70-200mm f/4 or dig deep for a 300mm f/2.8 . Or even stick with an A mount 70-200mm SSM f/2.8 and use the LA-EA3 , fast aperture , no mirror .

No longer a cheap compact system camera , but for long lenses with a fast aperture , that's physics for you !

I use A mount for most of my needs , the NEX 7 I have is for a lightweight pocketable camera , so our needs are different which is why I tend to use adapters to use my existing lenses on it rather than buying native E mount lenses . YMMV .

Edited by neilt3 - 28 June 2018 at 09:41
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Post Options Post Options   Quote butangmucat Quote  Post ReplyReply Direct Link To This Post Posted: 28 June 2018 at 01:48
Originally posted by addy landzaat addy landzaat wrote:

Originally posted by butangmucat butangmucat wrote:

It doesn't matter too much if I am carrying my KM 28-75 on a sunny day, but if I was forced to use my 100-300 APO for a indoor press release (as I did today), the half stop is really day and night.
f/2.8 to f/5.6 is two stops on your lens - in comparison the 0.5 stops from the mirror is peanuts. And the difference stays the same - mirror or no mirror. Just get a faster lens.


I meant "night and day" more from an end IQ/result stand point: on a sunny day, even with the SLT, I can stop my KM 28-75 down to f8 while still maintaining a reasonably low ISO that guarantees good noise and dynamic range. But for a indoor press release where I was forced to use the 100-300 APO, I am pushing my camera to ISO 6400 because of the SLT, and producing borderline usable images.
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Post Options Post Options   Quote butangmucat Quote  Post ReplyReply Direct Link To This Post Posted: 28 June 2018 at 01:44
Originally posted by pegelli pegelli wrote:

Originally posted by butangmucat butangmucat wrote:

Originally posted by pegelli pegelli wrote:

Originally posted by butangmucat butangmucat wrote:

That is a fairly big hit for certain types of lenses.
   

half a stop is half a stop, whatever lens is used.........


It doesn't matter too much if I am carrying my KM 28-75 on a sunny day, but if I was forced to use my 100-300 APO for a indoor press release (as I did today), the half stop is really day and night.
Just increase the iso 1/2 stop and I think you'll hardly see the difference in the end result (unless you're pixel peeping)


Well the 1/2 stop is ISO 4000 vs ISO 6400, then this does matter.
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