I'm not sure if I'm seeing the blobs. Is it on the surface of the negative or do you think it's uneven development. If the latter, do you tap your tank on hard surface after filling and each agitation cycle to dislodge bubbles?
kidtexas wrote:
I'm not sure if I'm seeing the blobs. Is it on the surface of the negative or do you think it's uneven development. If the latter, do you tap your tank on hard surface after filling and each agitation cycle to dislodge bubbles?
Yes, I tap the tank (or rather strike it ) after every agitation. But I agitate only ~5 times during the 12 minutes. So there's some time for bubbles to form in the pauses.
I haven't actually examined the negatives, but since I rinse the film for half an hour after development, I think it must be because of uneven development due to air bubbles on the film during the process. But I'm not sure, because the edges of the blobs are quite smooth. Could be because of the bubbles building up slowly though.
Almost all of the marks on my film come from the very final step, drying. I've seen all kinds of gunk - dust, scratches, water drying marks, even some gooey oily stuff from the tap water that caused me to redo my wash method.
I think I see the blobs now - all the way at the left most edge of the image? That does look like a developing thing. Maybe try more frequent agitation. Those look pretty large.
edwardkaraa wrote:
Makten, are you keeping the film in the fridge? If you do, these could be water condensation marks.
No, not after they are exposed. And before, I keep them in the freezer but I let them warm up before loading the camera. I usually develop the roll the same day that I shot the last frame.
kidtexas wrote:
Almost all of the marks on my film come from the very final step, drying. I've seen all kinds of gunk - dust, scratches, water drying marks, even some gooey oily stuff from the tap water that caused me to redo my wash method.
I think I see the blobs now - all the way at the left most edge of the image? That does look like a developing thing. Maybe try more frequent agitation. Those look pretty large.
They are very large, and that makes me wonder if it really could be bubbles of air. Shouldn't be very likely to form during ~2 minutes between agitations.
I'd say it's definitely not from drying. Something must be going on during development, or at exposure. The roll was shot at a few deegres minus Celsius, so I have no idea of what was going on inside the camera.
Edit: The film is new Tri-X that is far from expired, by the way. So it should be OK.
Makten, I still believe it must be condensation. Maybe because of the very low temperature outside. I once ruined a few rolls of film and a whole day's work because of these. The spots were very similar to what you're describing.
Makten wrote:
I keep them in the freezer but I let them warm up before loading the camera.
I think Edward could be right. Try letting them "warm up" in the fridge before subjecting them to room temperature, or even loading them straight from the fridge, perhaps even outside. There is no point in letting the film get to room temperature and humidity at this time of year.
I recently picked up a Hasselblad 500 with a 50mm. I haven't shot film since the early 90s and that was in a strictly point and shoot mode. Here's a few shots from my first few rolls (developed in a lab and scanned by me, I never thought scanning would be so tough!). I just bought some developing material but haven't gotten around to actually developing yet. Having absolutely no clue what I am doing is helping push that off a bit more...
Film was Illford 400 (xp2 I think) and Kodak portra 160. They were all scanned with an Epson v700 using the default software, hence the odd color. I'll have to rescan them with Silverfast or Vuescan.
edwardkaraa wrote:
Makten, I still believe it must be condensation. Maybe because of the very low temperature outside. I once ruined a few rolls of film and a whole day's work because of these. The spots were very similar to what you're describing.
carstenw wrote:
I think Edward could be right. Try letting them "warm up" in the fridge before subjecting them to room temperature, or even loading them straight from the fridge, perhaps even outside. There is no point in letting the film get to room temperature and humidity at this time of year.
I hear you guys! And the more I think, the more it seems that you're right. It can't be air bubbles, so it has to be something else.
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Whatever, here are some more shots with the Pentax 67II and 105/2.4. Wide open and handheld, as usual!
I looooooove this camera and lens. This is the look I've been wanting since I started photographing.
Having absolutely no clue what I am doing is helping push that off a bit more..
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I have recently started "bathroom" home B&W developing 120 film. I avoided beginning because, after reading about it, there were so many variables that I didn't know where to start. My advice is to just start with one or two developers D-76, Adanal or whatever and just do it. A good resource is "The Massive Dev. Chart" http://www.digitaltruth.com/devchart.php.
) after every agitation. But I agitate only ~5 times during the 12 minutes. So there's some time for bubbles to form in the pauses.
