A warning about the LA-EA2 adapter with FS100

[MBradshaw]

I've spent the last few months reading as much as I can about lens choices on the fs100. I was thinking nikon stuff with a novoflex adaptor although that means I'll be totally manual. I've fine with that but would prefer image stabilisation which either means the metabones adaptors with canon lenses or one of the sigma os lenses on the la-ea2. Am I correct in thinking the new firmware will give normal iris control with alpha lenses. Not like the la-ea1 which jumped open and then went the chosen f-stop which would be useless to me. I keep thinking metabpnes but am worried about the odd report of it losing communication with the lenses every so often.

Thanks, Michael.

[Chris Johnston]

Both my a mount lenses have normal iris operation, you can hear the iris moving a little but the iris opens and closes as you would expect.

I would love to see a sony e mount 18-55 2.8 with af and oss come out, but until that happens I'll be using the a mount zooms.

[no logo]

I would love to see a sony e mount 18-55 2.8 with af and oss come out, but until that happens I'll be using the a mount zooms

That is exactly what sony want it . At first sell La-ea2 and alpha lens as much as they can (people go to shop quickly buy our new modern la-ea2 + alpha lens -they say . After all of this they will give us sony e mount 18-55 2.8 with af and oss and maybe E-28-75, E-70-200 f2.8 money ,money ,money ,money ,money

[raiseitupmedia]

That is exactly what sony want it . At first sell La-ea2 and alpha lens as much as they can (people go to shop quickly buy our new modern la-ea2 + alpha lens -they say . After all of this they will give us sony e mount 18-55 2.8 with af and oss and maybe E-28-75, E-70-200 f2.8 money ,money ,money ,money ,money

+1

[Prophetmatt]

What I think some people are missing is the difference in the types of autofocus between the la-ae2 and the e mount system. At least from what I've read, the translucent mirror af is much much better than e mount af.

[evilthought]

I can see how I'm to blame for not doing enough homework, but it's oversimplifying to say I couldn't make the mistake. After all, according to Sony's FS100U product page (and BH's), the FS100 isn't even compatible with the LA-EA2. Nor can it do 25p! I do see (now) that the LA-EA2 mentions f/3.5 in the product page but that could just as easily been outdated info given changing firmware.

What I think some people are missing is the difference in the types of autofocus between the la-ae2 and the e mount system. At least from what I've read, the translucent mirror af is much much better than e mount af.

Exactly. LAEA2 does PDAF AF. It can track as well as a DSLR in still mode. The native e-mount lenses use CDAF system. Though CDAF has been improving (and might even catch up some day), for tracking subject that is moving directly towards the camera (or away from from it), or anything erratic in these direction, PDAF is simply superior. The PDAF system knows if the out of focus subject is behind or in front, so it can move the lens in the right direction. CDAF is trial and error.

[paulcurtis]

I have all these but still not been able to upgrade to the new firmware. I have the LA-EA1 as well which i am using now.

I don't understand the f3.5 limitation but the NEX 5N does it too (in video mode). For me the AF isn't so important. But does the iris open up and jump back? On the NEX 5N it works smoothly with the 2470Z, that's a bit disappointing. The push AF is really perhaps the most useful thing for me, does that work in manual mode and at any Iris?

I'm curious whether the FS700 firmware deals with the EA2 better, certainly it seems quite the selling point of it and you can do rack focus pulls and face tracking according to some of post NAB news i've read.

cheers
Paul

[BrianMurphy]

Both my a mount lenses have normal iris operation, you can hear the iris moving a little but the iris opens and closes as you would expect.

I would love to see a sony e mount 18-55 2.8 with af and oss come out, but until that happens I'll be using the a mount zooms.

I agree with Chris, and I am in the same situation. I bought the Z24/70 and it is a lovely lens and I am happy to have smoother and quieter control over iris with the LA-EA2 unlike the clunk of the LA-EA1 which I had t buy while waiting for the firmware. I will by the Z50 Emount eventually and hope for that 18-55 2.8 too. Something I haven't done since getting the upgrade is try a Variable ND on either the Z2470 or the Tokina 1116. Does the decreased light effect the AF or is the 3.5 lens opening to hold a minimum field of view for the LA-EA2?

[paulcurtis]

Don't forget that the Sony road map for e mount lenses includes some high spec G zooms, long term it will be interesting to see. I wonder if the FS700 rocker zoom is for existing lenses or for new ones. I suspect new ones, so that will be something to watch...

I like the sony ZA stuff because i also fancy one of sonys upcoming full frame DSLRs and they'll work great on that

cheers
Paul

[no logo]

Don't forget that the Sony road map for e mount lenses includes some high spec G zooms

They promise one in the end of 2012 . That what I said .They do it deliberately . I am quite sure ,they could be to give us straight away . Money ,money