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Forum: Film Processing, Scanning, and Darkroom
03-11-2022, 12:45 AM
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I'll give some tape a try on the next roll - hopefully it will fix the problem!
This seems like an excellent idea - I'll try to do a test like this!
Duly noted - I would be happier if the leak is coming from the film door, as I think that would probably be an easier fix than the shutter...
This sounds like a very systematic approach to diagnosing the leak. Perhaps I will give it a try! As for a 'red window', the Yashica 635 does not have one (you can see good photos from all angles here: Yashica-635 - Learn more the Japanese medium format camera).
Thanks for all the helpful responses. It may take me a few weeks, but I'll do my best to follow up on this thread with a report about my (hopeful) solution and the outcome of the next roll!
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Forum: Film Processing, Scanning, and Darkroom
03-10-2022, 12:12 PM
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These may not be great photos, but you can see the light leak in the lower left corner of each frame of the negative strips. It appears as a blackish splotch and is particularly visible near (but perhaps not within?) the gaps / spacing between frames.
As for the processing, I can't provide full details because I sent the film off to be developed at a local photolab. The filmstock is Fomapan Action 400, and I did not ask the photolab to push or pull anything, so I assume the processing was usual B&W fare.
---------- Post added 03-10-22 at 12:15 PM ----------
The 'seals' are actually some mildly decaying wool around the film door. But it all looks to be in relatively good shape, aside from one small section. Could be the culprit...
I'm starting to wonder if sticky shutter blades may actually be the problem, given my other difficulties with the slower shutter speeds (1/30th second and slower).
We can rule this out, I think!
---------- Post added 03-10-22 at 12:18 PM ----------
Thank you so much for spelling everything out so well for me! As mentioned, I'm new to film photography, so I'm still trying to learn the fundamentals. Your details will certainly get me thinking!
In general, I'm starting to think the leak may be solved by [1(a)] of your above list!
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Forum: Film Processing, Scanning, and Darkroom
03-10-2022, 10:22 AM
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Hi Fellow Film Photographers,
I have recently developed the first roll of 120 film I put through an old Yashica 635 twin lens reflex camera I acquired. The camera seems to be in pretty good working order, aside from the fact that the shutter sticks on its 'slow' speeds (1/30th of a second and slower). However, the shutter works fine on the 'bulb' setting and at all speeds 1/60th of a second and faster.
I was pleased with the performance of the lens and mechanics of the camera, but all the frames suffered from an apparent light leak (at least I think it is). Please see the attached scan for an example.
Does anyone know how to diagnose the light leak problem? And how to fix it?
From cursory research online, I wonder if the problem could be:
- Light leaking in through the door of the film chamber?
- A light leak related somehow to a shutter problem?
- 'User error' that may have resulted in a light leak when I loaded or unloaded the roll of film?
I'm completely new to film photography, and I have novice camera repair skills. Please could this excellent community proffer some advice and guidance?
Best Wishes,
Andrew
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Forum: Repairs and Warranty Service
01-24-2022, 07:12 AM
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Many thanks for the testimonial and recommendation. I have a few bits and bobs that I've been tinkering with myself, but may need to send to a professional. Glad to hear that there are good Pentax craftsmen here in the UK.
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Forum: Welcomes and Introductions
12-05-2021, 11:27 AM
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Excellent! There's a kestrel that haunts the apartment building across from my home, and I've attempted to take many a photo as good as yours. Though I haven't quite gotten there yet. Thanks for sharing!
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Forum: Pentax News and Rumors
11-24-2021, 01:31 AM
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Getting an entry here - good luck everyone! (1)
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Forum: Welcomes and Introductions
11-24-2021, 01:30 AM
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Welcome to the forums from England's fens!
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Forum: Welcomes and Introductions
11-24-2021, 01:30 AM
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Welcome to the forums! I shoot on 16mm cine lenses using a micro four-thirds Panasonic, but I've never tried with my K-5. Have fun with your lenses!
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Forum: Welcomes and Introductions
11-24-2021, 01:29 AM
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Welcome to the best repository of Pentax knowledge in the world! Enjoy your SL and your time in the forums!
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Forum: Welcomes and Introductions
11-24-2021, 01:28 AM
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Welcome to the forums! I can't advise, but it seems like some other friendly and knowledgeable Pentaxians have tried to help out. Good luck!
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Forum: Welcomes and Introductions
11-24-2021, 01:26 AM
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Incredible image - is that a kestrel?
Welcome to the forums from England's fens.
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Forum: Welcomes and Introductions
11-24-2021, 01:25 AM
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Welcome to the forums from the fenlands of England! It certainly sounds like you have a great deal of Pentax experience, and I must admit that I am envious of your K1 setup. I've been enjoying a K5 for about a year now (my first Pentax digital camera), but I hope to upgrade to full-frame someday.
Have fun in the forums!
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Forum: Film SLRs and Compact Film Cameras
08-19-2021, 05:12 AM
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Well, I've been able to get conclusive confirmation about the levels of radioactivity associated with my Super Takumar 55mm f/2. I contacted a Radiation Safety Officer at a local university, and much to my surprise, he agreed to undertake a few tests on my camera equipment. It turned out that my 55mm f/2 was not emitting any measurable radiation.
On the other hand, a 55mm f/1.8 that I recently acquired was measured to emit approximately 2 microSieverts per hour (gamma and beta radiation). This radiation was coming from the lens's rear element. I was told that the typical yearly radiation exposure associated with living where I live is approximately 2 milliSieverts per year, and that an exposure dose of approximately 10 milliSieverts per year is deemed to not be too awfully dangerous for members of the general public.
The measurable radiation declined substantially (to approximately 0.5 microSieverts per hour) when measurements were taken at the back of my Pentax S1a when the 'hot' lens was mounted to the camera. Additionally, a measurement of the unmounted rear element of the lens at a range of 10cm showed a similar dose of approximately 0.5 microSieverts. Increasing the measurement distance to 1m showed no discernible difference as compared to the background radiation being detected in the office where we were standing.
In sum, the Radiation Safety Officer with whom I spoke explained that I would need to hold the rear element directly against my body for about 1,000 hours in order to achieve a level of exposure equivalent to what everyone experiences in the area where I live on a yearly basis. This works out to about 2 hours and 45 minutes every day for 1 year. If mounted on a camera, it would take approximately 4 times as long (i.e. 4,000 hours / almost 11 hours per day for a year) to reach the typical level of exposure in my lived environment.
All of this information has helped me to feel more comfortable keeping (and using) my radioactive lens.
I hope that this information proves of interest to others!
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Forum: Welcomes and Introductions
07-30-2021, 01:27 AM
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It sounds like you're getting accustomed to your new camera—I'm sure it was very exciting to get your first roll(s) of film developed! :cool:
A friend of mine's sister worked as a nanny in various countries over the years, and it certainly sounds like a good way to see different parts of the world. I've never been to Italy, but it does seem like a country with lots of picturesque sights!
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Forum: Pentax News and Rumors
07-29-2021, 10:47 AM
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It's the final countdown! Good luck to everyone!
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Forum: Post Your Photos!
07-29-2021, 10:46 AM
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Is that Sheardown Hill? Another great photograph of a wonderful landscape!
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Forum: Welcomes and Introductions
07-29-2021, 10:40 AM
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Welcome to the forums from the Fenlands of England!
There are lots of helpful and friendly people here—feel free to ask questions and learn as much as you can!
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Forum: Welcomes and Introductions
07-29-2021, 10:39 AM
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Welcome to the forums from the Fenlands of England!
It sounds like a variety of helpful forum members have answered your question—good luck!
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Forum: Welcomes and Introductions
07-29-2021, 10:38 AM
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Welcome to the forums from the Fenlands of England!
I spent some time living in Dunedin in the past—NZ is a wonderful country!
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Forum: Welcomes and Introductions
07-29-2021, 10:36 AM
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Welcome to the forums from the Fenlands of England!
You're story provides a path for me to follow—I just acquired a secondhand K-5 and may indeed move to a different Pentax body in future years.
Can I ask why you decided to acquire your K-3 and how it's compared to your K-5?
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Forum: Welcomes and Introductions
07-29-2021, 10:32 AM
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That's one of the beautiful things about life—there are always new things we can find and discover even if they've always been right under our noses!
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Forum: Post Your Photos!
07-28-2021, 11:59 AM
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Aha! It would seem like there's a fungus amongus then!
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Forum: Pentax News and Rumors
07-28-2021, 01:13 AM
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Good luck to everyone in these final days!
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Forum: Post Your Photos!
07-28-2021, 01:12 AM
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An interesting photo—are those some type of fig?
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Forum: Post Your Photos!
07-28-2021, 01:11 AM
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#2 and #4 are my favourites as well!
Thanks for sharing!
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