Can you post an example?
Reciprocity departure would affect the entire image (giving less exposure than was expected), not a blob.
Kind of off the wall, but it happened to someone I know recently, could there be an insect in the camera body? Or a big blob of dust that is getting moved around?
Sorry, I missed the attachment. Will take a look when it gets out of the queue.
Yes--that was my sense about reciprocity as well.
A bug! Wow, maybe...?
The spooky part is the "Nikon 5D Mark II" that you refer to. Perhaps you
In any case, no reciprocity effect with digital.
So I've got this really spooky black 'blob' in a number of images.
They are all from the same shoot, I was using a Nikon 5D Mark II and lighting
the room with tungsten lights. My exposures were slow, between and 8th and a
30th, but I have shot a ton of film at these speeds and slower and never seen
anything like this. The only thing I could think of is resiprocity, but I'm
not sure that even exits in digital and besides, I have never seen it cause
The blob is not in every picture,and it moves! so I have to assume it is not
damage to my camera internally.
Was this space haunted or is this a digital problem I need to learn about???
You didn't hear about the merger?
well--climbing my way out of that hole!
yes, I meant canon.
I think I am so freaked out about being in the same room as big scary ghost that my brain wnet into remisssion.
Seriously, isnt this the beginning of a horror movie plot???
I see the file now.
Pretty indistinct edges. My guess would be something between the lens and the sensor, but closer to the sensor. It could be something hanging off the back of the mirror or something like that. Especially if it moves around between images. Have you taken the lens off and looked in the camera body?
Good point--I'll do that--right now I am trying to get rid of the blob in photoshop, and its not easy
It's absolutely something that landed on the lens...whether or not it's a live bug or not, can't tell you unless you can see how it's moving over some frames.
The reason I'm sure is that it looks just like a bug that was splatted against my lens when I was shooting from a moving motorcycle...only my bug had some green guts which the sun in backlight showed...at least in your image the bug (fly?) wasn't spread all over the front elements of the lens.