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Post by Rachel on Sept 18, 2007 7:17:25 GMT -5
Both these systems provided open aperture metering with M42 lenses but are they interchangeable?
I have a couple of Tamron Fujica ST mounts and they seem to work on my Mamiya SX but I'm not sure if the coupling is accurate.
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Reiska
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Post by Reiska on Sept 18, 2007 10:39:14 GMT -5
That 42mm lens mount (thread) is a standard and my guess (We Finns never say anything absolutely certain except death  ) is that they all work fine. There might sometimes be a "case" with an aperture pin if it exists. |
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Post by Rachel on Sept 18, 2007 15:20:58 GMT -5
Reijo,
yes, both will mount on any M42 camera but is the aperture follower the same? That is the special feature of these mounts ... they tell the camera what aperture the lens is set to ...... but are the Mamiya and Fuji systems the same?
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Reiska
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Post by Reiska on Sept 18, 2007 16:18:22 GMT -5
Can't say for sure, but I tried my Pentax, Yashica, Miranda TM, Zenit and Praktica M42 mounts, all with pins (that aperture follower) and they worked like a dream. Why will Fuji and Mamiya be different. That mount is a standard and this should mean interchangeability.
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Post by John Parry on Sept 18, 2007 17:09:28 GMT -5
Rachel
I think the Mamiya (and maybe the Takumar) lenses gave aperture information to the camera (same as the Praktica 'Electric' lenses, although I think on those it was a mechanical linkage). Whatever, they are all interchangeable. You may just need to use stop-down metering.
Try a Pentacon or CZJ lens on a Mamiya - something else!!
Regards - John
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Post by Rachel on Sept 19, 2007 3:03:13 GMT -5
Seems I'm not explaining myself properly here ....... I am NOT talking about the stop down pin on M42 auto lenses.
Both the Mamiya SX and the Fujica ST lenses have a cam on the aperture ring which engages with a corresponding cam on the camera body so telling the camera what aperture the lens is set to thus enabling open aperture metering. I know how it works and I know that any M42 lens will work on these cameras with stop down metering.
What I am asking is this open aperture facility identical for Mamiya SX and Fujica ST cameras? It looks the same and a Tamron lens with Fujica ST mount seems to match with my Mamiya SX camera and operate the cam and thus the exposure reading when I turn the lens aperture ring (NOT STOPPED DOWN).
BUT am I getting the correct meter reading using the Mamiya SX body and Fujica ST lens together?
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Reiska
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Post by Reiska on Sept 19, 2007 5:24:55 GMT -5
Now I got it!
You explained the case quite clearly. The "bug" was in my brains. If you have both cameras, as I suppose. Is it not possible to make comparisons of the given adjustments? All I know NOW is, that lenses / cameras which have this open aperture feature has a special design.
Cameras with this feature will also take any other lens with a Praktica screw mount. However, with lenses other than those designed specially for the camera, the light is measured through the stopped down aperture.
That caution was, that in some rare occasions the lens may stuck on the camera other than the same brand. Somebody might have more knoledge about this.
Sorry, not much help
Reijo
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Post by Rachel on Sept 19, 2007 6:05:33 GMT -5
That's OK Reijo. Thanks for taking an interest. You are right of course ..... although I haven't got a Fujica ST camera I can still compare exposure readings between ST and SX lenses on my Mamiya. I'm just being lazy asking on the board  |
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Post by Randy on Sept 19, 2007 7:36:48 GMT -5
I have a ST-605 with Fujinon Lens. I can use most any other M-42 lens on it. My STX-2 is bayonet but I got a M-42 adapter. For some reason the lens will hang up using the adapter, and I think it is the swivel on the adapter.
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Post by Rachel on Sept 19, 2007 13:45:40 GMT -5
Randy I am not familiar with the models in the Fujica ST series. The Tamron adaptors I have are marked F, one of the boxes is marked Fujica ST, and are M42 fit plus aperture follower. I have been trying to find out more on the web but it's very confusing. I think I've established that Fujica M42 cameras with open aperture metering began either with the ST705 or ST801. The web site I am looking at seems to be a bit confused about this if you look at the summary page and the individual page for these models. As I've said before, the system for making possible open aperture for Mamiya SX and later Fujica ST cameras looks,mechanically, identical and my tests seem to indicate that they are ..... until somebody tells me otherwise. The Fujica bayonet cameras must have started with the STX series? |
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Post by herron on Sept 19, 2007 14:04:36 GMT -5
Rachel: I've wished I had an easy answer to your question...being so familiar with Mamiya lenses and all.  But I'm afraid I don't have much experience with Fujica. And my own Google searches about it are frustrating, at best!  |
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Post by Rachel on Sept 19, 2007 14:07:38 GMT -5
Thanks for trying Ron. Google always seems to bring up more sales orientated sites than information sites. Do we have a Fujica expert in the house ? |
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Post by Randy on Sept 19, 2007 14:22:54 GMT -5
I think the bayonet mount started with the ST-901.
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Post by Rachel on Sept 19, 2007 16:53:52 GMT -5
I think the bayonet mount started with the ST-901. No that is still M42 ....... just been looking at a manual online ..... it uses the EBC range of lenses designed for open aperture metering Seems that these also have a lens lock just like the Mamiya SX lenses ......... uncanny  |
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Post by John Parry on Sept 19, 2007 16:54:21 GMT -5
Sorry Rachel
See what you're getting at now. Sorry, I thought you were were talking about the slightly later bayonet fittings (which first appeared on the Fujica STX-1 - hence the confusion). I have examples of both lenses somewhere but (whisper this quietly) I have Pentacon glass on all my M42 Mamiyas and Fujicas - Sorry Ron!!
What's wrong with you Rachel - put a film in both and interchange!!
Regards - John
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) is that they all work fine.
