OT: EX1 Owners ( Aberations at full zoom? )

FrigidNDEditing wrote on 2/23/2008, 12:10 AM
Alright guys, I've been viewing footage of the EX 1 and it's fantastic ( especially on the wide angle shots ), and in direct comparison on the same tripod at the same time as the A1 I can really see the difference. The only thing that I'm seeing is that on the full zoom, there appears to be some chromatic aberration that you don't get on the wide. Now I know you can't get everything for under 7K, but have any of you noticed anything of this nature? ( particularly since I have a tendency to shoot interviews zoomed in for the shallow DOF) (don't know what the Iris was set at on the fully zoomed footage from the EX1).

Anyway, I'd certainly appreciate any feedback any fellow EX1 owners can give, as the majority of the stuff I do would be zoomed in. Also I've heard of some image tearing from the CMOS rolling shutter business but that was posted by HVX users and I know that they can sometimes have a tendency to be... what's the word, crazy overzealous :).

Dave

Comments

Serena wrote on 2/23/2008, 1:00 AM
Just had a look at some shots taken at full focal length (of sailing) in full sun and I can't see any chromatic aberration, but it needs a more critical test. Certainly nothing in frame centre but more likely to show at wider aperture.
Recently I gave the camera some hard tests for rolling shutter artifacts and saw nothing unexpected or in the nature of a problem. However maybe someone will quantify their test conditions and post images.
farss wrote on 2/23/2008, 3:26 AM
Not that I've noticed either.
If you want a shallow DOF the EX1 should really float your boat.
Just be warned, you might get more than you bargained for.

Bob.
FrigidNDEditing wrote on 2/23/2008, 9:46 AM
thanks for the info guys, and if I just wanted a shallow DOF bob, I'd just buy a 35 adapter like a redrock or a letus, but here's hoping I still get more than I bargained for :) (assuming that is that I buy it)

Dave
rmack350 wrote on 2/23/2008, 12:17 PM
Doesn't that camera correct for lens shortcomings electronically? Seems like I read a few comments to that effect. You might want to check in with your dealer or with Sony.

Rob
MH_Stevens wrote on 2/23/2008, 12:39 PM
Please explain for me exactly what you see so I can look for it as I see nothing obvious.
MH_Stevens wrote on 2/23/2008, 12:39 PM
Please explain for me exactly what you see so I can look for it as I see nothing obvious.
Serena wrote on 2/23/2008, 2:36 PM
To remind you of Adam Wilt's review (January 31):
"Chromatic aberration is insignificant through 45mm or so; either the camera uses chromatic aberration correction, or the lens is a lot better than it has any right to be at the price. Only in long telephoto positions from 45mm onwards does some red/green lateral fringing appear, and it's minimal even then.
Boken is pleasing, a nicely soft defocus with no oddball artifacts. Vertical green/magenta fringing, the bane of defocused images on prism cameras, is present but subdued. Flare is about average for lenses in this class of camera."

There is much more, but I presume you read the original review. In the images I checked last night I thought there might have been a little red fringe on a white post at the edge of the frame, but it was negligible in the context.
farss wrote on 2/23/2008, 3:24 PM
Correct me if I'm wrong but what looks like CA seems most noticeable on high contrast edges such a tree branches against blue sky, moreso when the exposure is a bit on the high side. But I'm probably mistaking other artifacts for CA.
I think there's multiple issues at play as well, even with a 1/2" chip there is still a diffraction limit, there's also compression artifacts. I guess what I'm hinting at is what we see in worst case shots may have no impact in most well lit real world shots.

Bob.
Serena wrote on 2/23/2008, 4:05 PM
Lens testing demands controlled set ups and the sort of thing we see in too many user posts (not here, of course) are nothing of the sort and seem more directed to being the first to find something wrong. But as in astronomy clubs, there is always one half whose major interest is building telescopes, and the other half who observe the Universe.
Serena wrote on 2/23/2008, 4:06 PM
>>>high contrast edges such a tree branches against blue sky, more so when the exposure is a bit on the high side. <<<

Lens flare.
FrigidNDEditing wrote on 2/23/2008, 10:15 PM
I was pretty sure that I'll see nothing if I get it, but I wanted to get a few folks impressions of it. ( and compared to the XHA1 footage standing on the tripod right next to it there was a DEFINITE difference. The XHA1 still looked fine in the overall situation, but in these less than forgiving shooting conditions the EX1 was very much so in a higher tier ( and it should be at 2x the cost) than the XHA1.

Thanks for the input guys.

Dave