Odd film results

[hellosnails]

Hi all

I'm developing some rolls I recently shot. A few are fine, and a few random frames are showing issues.

In a couple rolls / frames, I'm getting this foggy/hazy spot in the center of the frame.
In others, I shoot more or less at the correct exposure, but certain frames are very underexposed or have this harsh vignette that starts half of the frame.

Any idea what could be causing these? Is it the lens or camera itself? I shoot with a Minolta CLE / M Rokkor 28mm. I scan myself but get developed at the lab.

Note: I did run the film through security xrays at the airports, though I read that it shouldn't affect ISO 400 or lower? Some rolls might have gone through 1-2x

Added a couple examples here:

Notice the fog right on the couple's face. This is on every frame of the roll more or less

Thanks!!

 

[Theo Sulphate]

Something on the scanner bed?

 

[Agulliver]

Is it fog, or is it a small area that is unfocussed?

I think you can rule out x-rays. X-ray damage doesn't look like that and practical experience shows that unless you put films in your checked baggage you can go through multiple airports with high speed film and suffer no visible damage.

I'm going with something wrong with the lens or something on the scanner bed.

 

[trendland]

From my point that is a typical case to clean your lens. If it isn't that it is more complicate.
But then it can't be 1) with your Film,2) with development.

It is your lens right?

PS : That could happen to everyone - ,no Problem at all I would say.

with regards

 

[winger]

1-It may be tough to see, but find a way to view the negatives themselves magnified to see if the hazy spot is really on them or if it's being added in the scanning process.
2-If it is on the negatives, check your lens under magnification.

For the vignetting - could the strap have been hanging near enough to the lens to cause it? Or a strap from something else?

 

[hellosnails]

1-It may be tough to see, but find a way to view the negatives themselves magnified to see if the hazy spot is really on them or if it's being added in the scanning process.
2-If it is on the negatives, check your lens under magnification.

For the vignetting - could the strap have been hanging near enough to the lens to cause it? Or a strap from something else?

It's a bit hard to explain, but I think what I'm seeing is that there are maybe 4-5 correctly exposed shots, then this vignette happens on one frame (I can see on the neg strip) then it extends to the next few frames. Like a gradient across the film strip itself.

I will try to get a magnified look at the negs. From the naked eye I couldn't see anything, but it's so small and subtle it'll need a closer look. Thank you!

 

[hellosnails]

Something on the scanner bed?

I thought that, but every frame on that film strip has the same spot in the same place, so it's affecting every shot. Which must be a lens issue.

But I shot other photos after those, and they do not have the same issue. It's really odd, and so many variables I don't know which one is the culprit!

 

[MattKing]

I thought that, but every frame on that film strip has the same spot in the same place, so it's affecting every shot. Which must be a lens issue.

A problem with a lens won't reveal itself in a localized manner like this.
Each part of the lens images the whole scene.

 

[russell_w_b]

Where is the sun in relation to your lens on the dodgy shots? I use a Hoya 24mm lens on the Pentax MX and an Auto-Chinon 28mm lens on the Praktica MTL3 which, if used without a hood, exhibits an over-exposed area right in the middle of the shot. There is sufficient front element protruding to catch the sun (or bright overcast sky) and to concentrate it on the very centre.

Fortunately, a straight, short rigid hood prevents this in most cases with me. The Chinon has one with it as standard which suggest it's an acknowledged problem. I made one for the Hoya by breaking apart an old rubber hood and retaining the rigid part.