sparky

<{POST_SNAPBACK}> Sorry- not a dogleg (bend) more a hairpin bend! The film bends 180deg around a moulded post in the cart before winding onto the takeup spool. It does on the feed side too but there there is a little roller to ease its progress. The design on the takeup side is meant to offer resistance to the take up drive to prevent the film being dragged through the gate after pulldown- so it shouldn't really be easy to wind on the film by hand! Mark

<{POST_SNAPBACK}> John, I know you didn't write the standard (did you??) but does that actually make sense to you? When they say operating the cart do they mean a normal cart with film in it? Those torques are very small and the torque would increase as the take up fills up. I'm not sure how many carts Alex has tried but the ones I have so far have all been rather stiff to turn but they are part used so will be stiffer than a fresh cart. I don't think its a good idea to force the film past that dogleg- it's meant to brake the film and stop it being pulled through by the drive. Pulling the film through puts a lot of stress on the film in those conditions. The only thing that your test would tell, I think Alex, is if the film is jammed or not and you could do that by advancing the film in the gate with your thumb- I think that would give you a better feel for the state of the feed spool which is the most critical side for jitter. Mark

Check out the scans of the test I did and had scanned by Uppsala Bildteknik: K40 test E64 test I think yes- see what you think! Mark

Hi John, I'd like to purchase that SMPTE doc and the 159.2-2001 but not if they're just short documents (for that money!) can you give me a hint at what I'd get if I bought them? (how many pages are they?) Mark

John Pytlak quoted: Thats wierd- was that there before? So Alex should be able to test his carts to see if they fit the spec, and reject any that require more than 1.5ozf.in- oh but only after removing the ratchet! Sounds quite low considering the film path. But they don't specify the slipping force of the drive- perhaps its a non-issue? Mark

Hi Andy, My B2008 has a dull looking gate, not plated like many, or smooth like the coated Leicina, but is polished where it counts- on the rails that the film runs against. It had black spots on those when I first got it and I had to be quite firm with a wooden tooth pick and isopropanol to remove these deposits- in fact I'm not sure if they were emulsion build ups or oxidation of the aluminium gate, but they are smoothed away now! I now always check the gate of new cameras under a microscope and burnish it if necessary with a tooth pick to make sure its spotless. I'm sure it could cause problems if it isn't, and thats apart from scratching! Could you check the feel of the take up drive dog of your B7008 before you send it for servicing- is it stiffer than your other cameras? Mark

John, I just had a look through a list of SMPTE standards and there seem to be many for 8mm type S. There seem to be many with titles like "16-mm Film Perforated 8-mm Type S, (1-3)" and the same for 35mm. Do you know what thats about? Mark

But no actual spec of a torque figure? Is it possible to get a copy of the super8 spec SMPTE document? Mark <{POST_SNAPBACK}>

Hi John, How important is the takeup tension applied to the spool by the camera in ensuring even advance of the film? Was there a specification for it? All super8 cameras use a slipping clutch to allow for the varying diameter of the take up spool and if this relied on grease that had maybe dried up after 30 years, could that be causing too much tension and steadiness problems? I know this happens in Bolex R8 cameras which have a similar sort of hairpin-bend dynamic brake to stop the film being dragged through by the take up drive. Mark