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m42 adapters: results summary

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mikethelaserman View Drop Down
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Post Options Post Options   Quote mikethelaserman Quote  Post ReplyReply Direct Link To This Post Posted: 27 February 2006 at 17:56
Bought a 42mm adaptor (second-hand, no-name) from my local photo shop on Saturday (L5 GBP).

Two points to look out for :

1 There were clear signs that the little screw (holds the M42 lens in place) had jammed the Minolta bayonet and someone had had quite a time getting the adaptor off the camera. (I have removed the screw and WON'T be using it!).

2 The clearance between the camera's lens contact pins and the metal of the adaptor was so small as to be invisible. I could not see the pins depress, but even so, I was not prepared to risk it. I machined away the adaptor in the area of the pins to give a visible 0.5mm clearance all the way and now it is fine.

Those who have seen my posts about horrible old lenses may wonder why I bought the adaptor. Two reasons : 1 - I have dragged my macro extension bellows out of the loft for a play and that has 42mm fittings (each end) and 2 - I found an old 500mm f8 mirror lens that I had forgotten about, so I thought that I would try it (there's not much to go wrong with mirrors - they are either great or rubbish, with nothing in between) and it seems OK tested on a very dull day.
 



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damian.bradley View Drop Down
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Post Options Post Options   Quote damian.bradley Quote  Post ReplyReply Direct Link To This Post Posted: 19 March 2006 at 17:41
Just bumping this thread as I have added the my own m42 adapter results. Happy to say thet focus to infinity is no problem, but there is some play between the body and the adapter which doesn't seem to present a problem, but is a little disconcerting with my 300/4 on there.
Thou shalt not covet thy neighbour's lens // Portfolio
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dCap View Drop Down
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Post Options Post Options   Quote dCap Quote  Post ReplyReply Direct Link To This Post Posted: 19 March 2006 at 20:07
thanks for the bump damian and the e-mail info.
Sony RX100 IV Zeiss Vario-Sonnar T* 1,8-2,8/8,8-25,7 [ 24-70mm ]
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X-R-M View Drop Down
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Post Options Post Options   Quote X-R-M Quote  Post ReplyReply Direct Link To This Post Posted: 19 March 2006 at 22:16
There is screw mount lens to Minolta body adapter at Adorama. I have no idea if they mean M42, there is no info.

http://www.adorama.com/CZPUMN.html
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Sanjuro View Drop Down
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Post Options Post Options   Quote Sanjuro Quote  Post ReplyReply Direct Link To This Post Posted: 20 March 2006 at 07:37
It seems like it for general use, put it in some other lenses to fit your KM.
Rgds
Sanjuro

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zbozic View Drop Down
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Post Options Post Options   Quote zbozic Quote  Post ReplyReply Direct Link To This Post Posted: 21 March 2006 at 14:12
I've bought a Hama M42 adapter for 20$ on second-hand sale meeting. It have a visible gap between pins and I don't need to machine it. I tested it with Helios (Zenit) 40-2 85mm f/1.5 and it works. Focus to infinity, no problem.
 



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dCap View Drop Down
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Post Options Post Options   Quote dCap Quote  Post ReplyReply Direct Link To This Post Posted: 21 March 2006 at 14:20
Just if anyone is interested. I got some ex-russian leneses in the post: 85/2, 37/2.8, 50/2.8 macro

The 50/2.8 is for a head to head with my Min 50/3.5

The 85/2 is just for fun and bokeh playing. Should have kept the Min 85/1.4 for a few more weeks huh!!

Might keep them. Might just test them, report on how to use M42s on a KM5D or 7D and then eBay them off at the price I paid for them. They're just a bit of fun.

Might even track down a Pentax SMC 50/1.4 to test against my two Minolta 50/1.4s (original & new) in the Bokeh and sharpest review I'm in the middle of.

Edited by DcapVividOptic - 21 March 2006 at 14:21
Sony RX100 IV Zeiss Vario-Sonnar T* 1,8-2,8/8,8-25,7 [ 24-70mm ]
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jarenas View Drop Down
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Post Options Post Options   Quote jarenas Quote  Post ReplyReply Direct Link To This Post Posted: 04 April 2006 at 23:49
I have read how many of you have had success w/ your m42 + 5D however, I would like to venture into this realm but using a 7D. Is it possible those with M42+ 7D experience chime in?

Which ones work or what modifications can be done to specific M42 would be appreciated.

Thanks.
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brettania View Drop Down
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Post Options Post Options   Quote brettania Quote  Post ReplyReply Direct Link To This Post Posted: 05 April 2006 at 00:03
Jarenas
Whatever works on the 5D also applies to the 7D.
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dCap View Drop Down
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Post Options Post Options   Quote dCap Quote  Post ReplyReply Direct Link To This Post Posted: 05 April 2006 at 01:02
Originally posted by brettania brettania wrote:

Jarenas
Whatever works on the 5D also applies to the 7D.


Yep, I tried my 85/2 & 37/2.8 on both. The 7D's mount seems to be tighter. So I use the 5D.

The 50/2.8 macro lens is too deep, the screw in lens brings the lens too close to the camera, and it won't mount on the camera. So you either mount the ring then screw the lens, but not too far. Or you don't buy this lens. I paid very very little for it. And I'll probably eBay it pretty soon unused just becuase it a pain. Will post it in here for sale on an ad on it own first to see if anyone wants it.
Sony RX100 IV Zeiss Vario-Sonnar T* 1,8-2,8/8,8-25,7 [ 24-70mm ]
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Bob J View Drop Down
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Post Options Post Options   Quote Bob J Quote  Post ReplyReply Direct Link To This Post Posted: 05 April 2006 at 09:44
I bought a Minolta/M42 adapter from Hong Kong on ebay a few weeks ago.

The apapter seems reasonably well made/finished and fitted my 5000 fine, but would not fully engage with my 5D - not a great problem as it worked fine where it was -a couple of mm off register. last night I tested which of the bayonet flanges was stopping full engagement (it was the one below the small hole as you look at the back of the adapter) and took the front off that flange with a file.

Once cleaned up the adapter fits very nicely and the catch engages in the hole.

In summary: The Hong Kong adapters work fine as delivered, but don't click into place on a 5D. They can be easily modified (without special tools) to fit snugly.

Bob
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Timbuctoo View Drop Down
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Post Options Post Options   Quote Timbuctoo Quote  Post ReplyReply Direct Link To This Post Posted: 05 April 2006 at 15:02
DcapVividOptic - Tim here. So your adaptor worked on the 7D without any modifications? What one do you use and where did you get it from? Do they affect the metering?
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dCap View Drop Down
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Post Options Post Options   Quote dCap Quote  Post ReplyReply Direct Link To This Post Posted: 05 April 2006 at 19:29
Originally posted by Timbuctoo Timbuctoo wrote:

DcapVividOptic - Tim here. So your adaptor worked on the 7D without any modifications? What one do you use and where did you get it from? Do they affect the metering?


Actually I had trouble getting one of them off the 7D last night. So I won't recommend or otherwise my source until I've tried the other two I got from same place. I have three rings (3rd lens coming soon), the two I have on the 37/2.8 & 85/2 mount/unmount from the 5D fine. 7D too tight for me to want to try again. ODD! Should be the same mount, maybe the bits inside the camera away from the mount are a different clearance on the two cameras?

Anyone else got 5D & 7D and have differences here?
Sony RX100 IV Zeiss Vario-Sonnar T* 1,8-2,8/8,8-25,7 [ 24-70mm ]
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Timbuctoo View Drop Down
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Post Options Post Options   Quote Timbuctoo Quote  Post ReplyReply Direct Link To This Post Posted: 06 April 2006 at 06:00
Thats a pity. I'm not gonna go buy a 5D just to do this however! Must be some way around this because I've heard of the M42 mount working fine on other cameras with metal lens mounts. Probably the loosest fitting one on the 5D would be a perfect fit on the 7D.
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