bird photos on cloudy day

In message .com,
wrote:

Chromatic aberration is in the lens, not the environment. Better lenses
have little or none.

The higher the contrast of edges, the more easily you can see CA. A
bird silouetted against a cloudy sky is one of the most high-contrast
situations you're going to run into.

My general rule is that I shoot birds against the sky on sunny days, and
on cloudy days, I try to shoot low birds with vegetation or the ground
as background, whenever possible.
--


John P Sheehy

In message ,
paul wrote:

A deep blue sky is pretty dark. A cloudy sky is white so much more
contrast & more noticeable CA, I would guess. Definitely more purple
fringing on a digicam.

Agreed, except to note that purple fringing and CA are two completely
different things. CA happens in the lens; purple fringing is a
logistical bug in the demosaicing process, triggered by photosite
leakage (colored light is assumed because of the filters over the cells,
but is actually leakage that occurs *under* the filters).
--


John P Sheehy

In message ,
paul wrote:

A deep blue sky is pretty dark. A cloudy sky is white so much more
contrast & more noticeable CA, I would guess. Definitely more purple
fringing on a digicam.

Agreed, except to note that purple fringing and CA are two completely
different things. CA happens in the lens; purple fringing is a
logistical bug in the demosaicing process, triggered by photosite
leakage (colored light is assumed because of the filters over the cells,
but is actually leakage that occurs *under* the filters).
--


John P Sheehy

In message ,
wrote:

I live in Oregon and many cloudy days are very much grayer than white.
The contrast between a perched bird and its background is not as
pronounced as on sunny days or on days with bright white clouds as
background.

That's only possible if your backdrop is the underside or side of a dark
cloud, but it is sunnier where the bird is. With homogenous cloud
cover, the sky is always much brighter than a grey card mounted on a
tree branch.
--


John P Sheehy

In message ,
wrote:

I live in Oregon and many cloudy days are very much grayer than white.
The contrast between a perched bird and its background is not as
pronounced as on sunny days or on days with bright white clouds as
background.

That's only possible if your backdrop is the underside or side of a dark
cloud, but it is sunnier where the bird is. With homogenous cloud
cover, the sky is always much brighter than a grey card mounted on a
tree branch.
--


John P Sheehy

Actually, Michael has a point. Does the OP really mean Flare or Chromatic
Aberration?


Francis A. Miniter
I probably mean flare because what I see many times doesn't arise from
the lens. I'm using Canon L glass and I think it's clean.

Thanks to all for your comments.

Dale

Actually, Michael has a point. Does the OP really mean Flare or Chromatic
Aberration?


Francis A. Miniter
I probably mean flare because what I see many times doesn't arise from
the lens. I'm using Canon L glass and I think it's clean.

Thanks to all for your comments.

Dale