It's possible, that's why I wanted to see if this is normal. I tend to half press like that a lot. Sometimes I prematurely trip the shutters on other cameras, woops.
Originally Posted by Mark Crabtree
How far and hard are you pressing down?
This morning I tried the half-press on my F and this is my observation: with light to moderate pressure, the release goes down a very little bit (maybe 2-3mm), then stops; increasing the pressure immediately trips the shutter. If I let up instead, I can then re-press and release the shutter - no need to wind on. So, to me, it behaves as one would expect.
It would seem that maybe something has gone out of adjustment on your F. I would like more responses to see how common this is. My F is from the late 1960's.
Nikon: F, F2 x3, F2S x2, F3/T x2, F4S x2, FM, FM3a, D700
Canon: EF, AE-1P, RebelG x3, Elan 7NE, QL17GIII, Canonet 28
Leica: M3 x2, M6 x2
Exakta: VX x3, VXIIa
Hasselblad: 500C/M, 501C, SWC, 553ELX
Mamiya: RB67 Pro S x2
Fuji: GW690III, X-Pro1
Polaroid: SX-70, SLR 690, Image 1200
Minolta: Maxxum 7, DiMAGE X1
Minox: III, IIIs
Graflex: Pacemaker 4x5
Olympus: XA, XA2
Other: Pentax SP500, Ricoh GR1, Voigtländer Bessamatic
Lenses: way too many to list
I should probably clarify that this is a rare occurrence for me, but I've been seeing it with F's for 40 years. I just tried the two I have here at the moment and can make them do it; you might very well not be able to. It is not something that happens whenever you put a little pressure on. I always thought of it as just a quirk of the linkages being aggravated by something I was doing. Mine was probably aggravated years ago by my nervous habit of checking the advance, yet it still didn't happen every week (100' of film back then).
Patient, "It hurts when I do this".
Doctor, "Don't do that".
And I don't mean that as flippant as it might sound, just a feeble attempt at humor. Maybe the OP's camera is worse. Maybe adjustment will fix it. When my Leica's need service I spend a fortune getting them to factory spec. F's are so cheap, I might have trouble justifying that myself, but it is always nice having a smooth working, well adjusted camera.
In trying mine I did notice something that might be helpful. I have Nikon soft releases on mine and had to take them off to expedite getting the behavior we are talking about. I think you are less likely to half press with that tall soft release, and I think they transform the feel of the camera for the better. I hear there are cheap copies on eBay that are just as good. In the old days the generics were completely different and grossly inferior.
On mine it was a lubrication issue, when you partly pressed the release and then let off, something would not move back to the original position, "fooling" the rest of the camera advance mechanism into believing the shutter had tripped. A CLA cured it, and 18 or so years later it still behaves normally. The body was made in mid-1968; I'm sorry I can't remember more details.
Originally Posted by Theo Sulphate
That's exactly what it feels like.
Originally Posted by E. von Hoegh
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When you remove the back, there's a plate attached to the main casting at the base, the sticky parts are under this plate IIRC. You could nurse the camera along by applying some Break-Free (tm) to the dry points, but too much is as bad as too little (you need a 6x-8x loupe, a watchmaker's oiler, and the service manual to accurately apply oil to a mechanism like this) and the camera really does merit a proper CLA.
Originally Posted by mweintraub
Yeah, sure sounds like I should let someone who knows what their doing to do it properly.
Originally Posted by E. von Hoegh
My F is an early one. 64x serial if I recall.
Let us know if you service it and it fixes the issue. It sure sounds like yours must be worse than any I've used.
I picked up the F to see how far I have to press the release to get it to duplicate and it seems like it doesn't happen everytime. When it does, it doesn't have to be pressed too far down when you hear something release inside. Maybe it just needs a work out. I'll keep a CLA on the back burner.
Who would be recommended in the US for an F service? I have a 1972 F with a 1968 Photomic TN finder. The meter isn't an issue I have a Weston that was recently rebuilt/serviced by Quality Light Metric.