7 replies to this topic

[theimutte]

In process of building a film holder to use Polaroid GO film inside of a 5.5" Schmidt camera, been doing radius and thickness checks to nail down the dimensions of the film holder.

In the last two nights testing for focus and coverage I've started to encounter these large streaks on the photos.

 

I cannot figure out of this is a result of Solar activity, Skyglow or some odd reflections/light leaks. Only started happening in the past week.

Any ideas?

 

 

I also have 1 other test photo, way overexposed but is completely pink.

[TxStars]

I would guess it is a light leak when loading the film / holder..

What are you using over yourself when inserting the film holder into the Schmidt camera?

[theimutte]

I would guess it is a light leak when loading the film / holder..

What are you using over yourself when inserting the film holder into the Schmidt camera?

Over myself? I suppose nothing. The holder is kept in a small light poof bag before I am ready to take it out and insert it. Once it's placed on the magnet, last thing I do is remove the film lid and close the door. I don't use any lights, and there is enough ambient light around to see where I'm going.

[TxStars]

Here is a quick reference of how I was using my SC ..

 

1) Place loose fitting cap on schmidt camera.

 

2) Place film in holder in dark room / change bag

 

3) when ready to load / unload camera place lightproof blanket over yourself & camera

 

4) load holder into camera, close side door

 

5) take off lightproof blanket

 

6) ensure camera is still pointed at target

 

7) carefully remove front cap to begin exposure

 

8) end exposure by replacing front cap

 

9) cover yourself with the lightproof blanket

 

10) open side door of camera

 

11) remove holder and place in change bag

Edited by TxStars, 05 December 2024 - 10:37 AM.

[theimutte]

Here is a quick reference of how I was using my SC ..

 

1) Place loose fitting cap on schmidt camera.

 

2) Place film in holder in dark room / change bag

 

3) when ready to load / unload camera place lightproof blanket over yourself & camera

 

4) load holder into camera, close side door

 

5) take off lightproof blanket

 

6) ensure camera is still pointed at target

 

7) carefully remove front cap to begin exposure

 

8) end exposure by replacing front cap

 

9) cover yourself with the lightproof blanket

 

10) open side door of camera

 

11) remove holder and place in change bag

Thanks for the steps,

going to try the light proof blanket for sure

[Weisswurst Josef]

Have an idea: Can it be that this Polaroid film is sensitive to mechanical preasure?

So this effect would not be caused by light but by handling.

[TxStars]

Have an idea: Can it be that this Polaroid film is sensitive to mechanical preasure?

So this effect would not be caused by light but by handling.

Could be.. Easy enough to test.. Just push a finger/ thumb hard on it then develop

[theimutte]

Have an idea: Can it be that this Polaroid film is sensitive to mechanical preasure?

So this effect would not be caused by light but by handling.

I have thought about this.

I've done many Polaroid photos and run to this kind of pod error once in a while. Only thing I can say is that it would not look anything like what I have on these photos. Chemical pod failure looks like large white scars that run up and down the photo.

This is also temperate failure, Polaroid film that develops in a cold setting will have a large blue color shift, however I have overtime tried to mitigate that problem.

Edited by theimutte, 17 December 2024 - 12:17 PM.