chromatic aberrations

[bj**rn]

hi

maybe this has been discussed before and i just haven't found it. i shot some footage with the ex1 + ps mini 35mm adapter and had serious chromatic aberrations.
even without the dof adapter there were noticable green, margenta and even lines on the focus chart.
on the actual shoot we ignored them, because we knew, we could fix it in a secondary cc. but still, the blue lines were so thick, you could even see them on the flip out lcd of the cam.

has anybody had similar experiences with the camera? any solutions?


björn

 

[seunosewa]

Grabs?

 

[Fohdeesha]

you got some cro-mabs, bro

 

[bj**rn]

sorry no grabs. i don't have access to the material right now and cannot show it on the net before it is broadcasted. it was easy to fix in post, so it's all good for me. i just don't want to deliver images like this again.

 

[basspig]

The lens on the EX1 has considerable CA at zoom levels past 70. It's common for the EX1. The lens seems to be optimized for use on the wide end, rather than the tele end.

 

[Stevet]

The lens on the EX1 has considerable CA at zoom levels past 70. It's common for the EX1. The lens seems to be optimized for use on the wide end, rather than the tele end.

Agreed!

I have noticed that CA is worse on the tele end when focusing at further distances.

 

[thxdave]

Mine has CA at full tele as well. I asked Sony about it and they didn't seem at all concerned. I'm on my third lens on my EX1 (not for CA issues, btw) and they all had it. I think the only way you could avoid this issue is via a Letus adapter (or similar) using well corrected lenses. Since you'd be using the zoom at a more moderate zoom setting, you'd avoid the CA-prone settings.

 

[basspig]

'Tis a bit of a shame, since the tele on this cam is rather anemic, and I have a tendency to need more than the 14x. Looked at a Raynox 1.8 extender for $2,000, but the thing is as big as a small telescope.

 

[seunosewa]

Better tele than wide, since you can almost always move closer to your subject.

 

[basspig]

Not when you're shooting a closeup of a performers fingerwork from a balconey 70' away! The EX1 gets as close as a 1/2 body shot. Can't get in any closer, and the CA on the black and white attire looks really consumer cam, which is embarassing for us to explain away.

 

[Buck Forester]

The only time I notice any slight purple fringing effects is when I'm shooting someone close up with a really bright background compared to the foreground, such as someone in front of a window. The edges of the their head sometimes gets that purple fringe, but that's a situation that's often problematic with most glass whether still or video.

 

[mico]

'Tis a bit of a shame, since the tele on this cam is rather anemic, and I have a tendency to need more than the 14x. Looked at a Raynox 1.8 extender for $2,000, but the thing is as big as a small telescope.

Where is the Raynox 1.8x listed for $2000. I find the HDp-9000ex at $899.00.

Is there another model coming out?

 

[chagchag]

I think the only way you could avoid this issue is via a Letus adapter (or similar) using well corrected lenses. Since you'd be using the zoom at a more moderate zoom setting, you'd avoid the CA-prone settings.

Alas, this is not the case. You have to zoom in to between 75 and 82 to avoid fringes, vignetting and soft edges using the Letus Extreme.

And as mentioned zooming beyond 70 means CA.

 

[thxdave]

Thanks for that, Chaq. Since I don't have a Letus (yet), I wasn't sure what zoom position you had to use to get the framing correct. I'll have to doublecheck my CA issues as I've noticed them mostly at the full tele position and didn't notice it at mid-tele.

 

[Dennis Wood]

We shot our EX1 fix/Zeiss article a few weeks ago using the EX1 and our CFXL imaging element. Zoom required is generally Z68 to Z72 to get a correct 36mm wide image frame. We're very happy with the CA levels. You'll see a session dedicated to optimizing the EX1 for use with our adapter next week...just finishing edits.