Question WRT the direction in which film is exposed.

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Hoodi

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Sooo I just got back another roll from my RB67, and despite having thought I'd found the location of my pesky light leak (and fixing it) it seems I haven't :

foggingfh6.jpg


The fogging on this roll is waaaay more pronounced, probably because I shot the roll on a bright, sunny day. The fogging is always in this exact same position. For those of you familiar with the rotating back of the RB67, if I rotate the back the fogging moves to the upper left of the frame ~ the same place basically, meaning it has to be a leak either on the rotating mechanism or the film back. (And not in the bellows).

So now I'm trying to ascertain on which side of the back // rotating mechanism the leak is.

I have tried to work it out in my head but just wind up getting terribly confused :(

Can anyone help me out here? :)
 
The image hits the film upside down and flipped laterally from left to right as a negative image. So if you reverse the process and flip your positive image top to bottom and then flip it left to right, that should be where your leak is - top right in landscape mode? You've got me at it now. :D

Looks like the film back seals leaking?
 
Sweet CT, cheers. I knew the light hit the film flipped vertically, but wasn't sure if it was flipped laterally, aswell.

I would just say yeah, you're right, it does look like the film back seals... Problem is I can't see any degeneration of the foam seals (anymore than in other places) nor can I see any warping et cetera of the metal.

The other fun thing is that the leak could be on the join between the rotating back (this is seperate from the film back, it is removable so's you can stick polaroid backs on etc.) and the camera body.

The other thing that's confusing me a bit - the definition to the edges of the fogging. Shouldn't it be bleeding freely across pretty much the whole frame? This leads me to beleive that the leak is pooling light onto the film when it's on the spool perhaps, and therefore limiting its ability to spread. The leak is about the width of a fully spooled roll of film, although shouldn't the leak then be slimmer at the start of the film and gradually wider towards the end? O____O

Brain hurts.

As a complete aside, this roll was Fuji Reala 100. I really, really like the colours ~ but it's not a particularly sharp film (as I'm led to beleive no portrait films are, understandable I guess) & it's also kinda grainy for 100 ISO. Hmmmm, need to try more types of film :D
 
I'd be surprised if it's happening on the spool Hoodi, but leaks like that can drive you daft and it could be something smaller than a pin hole you're looking for. Have you tried Yellow Pages for anyone close to you who might be able look at it?

I have a factory trained tech very local to me. Unfortunately like everyone else he's been hit by the digital boom and he's closed his shop and works from home, but on film cameras only. There are lots of these guys about if you can find one.

Edit. The first time I used Reala was for a wedding on a dismal drab day with a featureless white sky and I wasn't looking forward to getting the prints back. In the event the shots all looked like they'd been taken in the Med - beautiful blue skies. Reala ... :thumbs:
 
Having spent a good old time staring at it the only thing I can see that it could be is perished foam seals. Even then it baffles me!

With that in mind I've ordered this. They do a smaller kit, too. For archival purposes the seller is "interslice" on ebay, he's US based but has very reasonable worldwide shipping rates. He sells foam replacement kits that are pretty generic but should fit most cameras.

At a pinch over £6 it's no real loss if it doesn't fix the leak, and the rest of the seals could do with replacing anyway. If after I've fitted this I'm still getting the fogging with no change I'll just bite the bullet and get a new back :)
 
In terms of film, I'm really keen on Fuji's Pro 160C and Pro160S, with C being more saturated, 400H is good also. For slides you can't go wrong with any of the Fuji emulsions really, though I prefer velvia (50 or 100, not 100f) or provia (100 or 400) to astia, they generally have more interesting colours with astia being very true to the scene but a bit boring.
Sorry I can't help with your light leak issue, but hope this post wasn't too badly off topic.
 
Not at all, Pro 160S & C are on my list of films to try out. I like velvia but it's a smidge contrasty and my scanner struggles to see its true black point. I'll try out provia :)
 
Good luck with the fix. That stuff looks like it's well worth trying. I bet the pros don't use stuff that's much different. ;)
 
This brings back memories......

I had something similar once and I used thick black masking tape to mask off half of the back. Then test shot another film the results of which gave me a clue as to where the fault was.
 
Long time since I owned an RB, could this be from the dark slide slot?
Do you only have one film back?
 
Guys, this ebay seller seems to be one of those who is actually more interested in providing an otherwise tricky to find item at what must realistically be near as damn it cost (especially when you consider the time involved) than actually trying to make money.

As soon as the auction closed he mailed me asking about Cardiff and what camera I would be using it on etc. Turns out the guy used to live here in Wales before moving out to the US.
Anyway, long story short he linked me to his site where there are specific instructions for a bunch of different cameras (including the RB67 back!) and he also dropped me a few extra RB67 specific pointers. Basically, a friendly, helpful chap.

Not that I've actually got the stuff yet, but I recommend him ;)
 
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