[quote name='wim' date='16 July 2010 - 01:53 PM' timestamp='1279281223' post='1042']
Hi Lars,
Auto in the days of this lens meant automatic diaphragm coupling and closing, when shooting of course. There is no way to do this automatically with such a lens when adapted <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='
' />. It's mechanical rather than electronic.
[/quote]
Ah, that makes more sense.
[quote name='wim' date='16 July 2010 - 01:53 PM' timestamp='1279281223' post='1042']
The cheap one is likely to have the older generation chip. The newest chip, which is programmable very easily and widely for the lens connected, can actually provide some extra exif information, such as the lens name, provided you programmed it in.
Personally, I would opt for a black anodized adapter, so as to prevent any glare and veiling from reflections of the adapter. Personally I use these:
[url="http://haodascreen.com/m42.aspx"]http://haodascreen.com/m42.aspx[/url], and you can find a picture on the home page. Very good, well finished, excellent service.
M42 adapters should not harm your camera, as the register distance of M42 lenses is larger than that of the EOS mount. The only damage I could think of is not well polished adapters which may scratch your camera mount by burrs on the adapter flanges. If you buy a decent one that shouldn't be a problem.
[/quote]
I didn't expect the hardware to be a problem, but could imagine cheap electronics being dangerous.
[quote name='wim' date='16 July 2010 - 01:53 PM' timestamp='1279281223' post='1042']
Another good supplier you can find here: [url="http://www.fotodiox.com/catalog/index.php?cPath=21_29_32"]http://www.fotodiox....?cPath=21_29_32[/url]
These are the professional grade ones <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='
' />.
Other than this you could also go for Novoflex, but those are really expensive. I've got a few Leitz-R adapters from Novoflex. Very well made too.
[/quote]
Thanks for the links!
[quote name='wim' date='16 July 2010 - 01:53 PM' timestamp='1279281223' post='1042']
With cheaper adapters it is always a question whether they are machined properly, i.e., evenly, so that the lens sits perfectly in position, with its optical axis perfectly perpendicular to the sensor/EOS mount, and is also of the exact and correct thickness for that particular lens brand, with infinity focus still being possible. You don't have such problems with the above three, at least, not to my knowledge so far <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='
' />.
BTW, if you ever want to adapt a Nikon G-lens and still want to control the aperture, you'd need to get a G-EOS adapter, which was only available from 16-9.net, [url="http://www.16-9.net/nikon_g/"]http://www.16-9.net/nikon_g/[/url]. Works very well too.
I did try quite a bunch of cheap adapters, and I did find that if you're lucky about 1 in 2 or 3 works properly. I didn't have any of those problems with the better ones <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='
' />.
Regarding the Mamiya 55 F/1.8.: Since I don't know this particular Mamiya lens, I decided to do some more checking on it, and it looks like there may be a slight problem with the SX lenses when adapting to another mount. Check here:
[url="http://forum.mflenses.com/mamiya-sx-lens-aperture-ring-removal-etc-t30313.html"]http://forum.mflenses.com/mamiya-sx-lens-aperture-ring-removal-etc-t30313.html[/url]
Just scroll down a little for the post with the picture. The aperture ring may be in the way of the adapter to fit properly, and the extra pin it has for coupling with the Mamiya metering system also needs to be filed away. The SX series actually has a modified M42 mount in order for them to have additional benefits with Mamiya cameras...
In short, I reckon it is best just to be on th elookout for standard M42 lens rather than this particular one. It looks like it may be a fair amount of trouble to make it work properly with a Canon EOS mount camera. However best check the lens first, if you can anyway.
[/quote]
I'll get the adapters first - they'll be useful for many other lenses anyway - and then go down and test it.
[quote name='wim' date='16 July 2010 - 01:53 PM' timestamp='1279281223' post='1042']
BTW, is it a reltive of yours in this particular thread on mamiya lenses in the mflenses forum?
[url="http://forum.mflenses.com/auto-mamiya-sekor-50mm-f28-m42-t26406.html"]http://forum.mflenses.com/auto-mamiya-sekor-50mm-f28-m42-t26406.html[/url]
[/quote]
No, we tend to have our family names last around here
[quote name='wim' date='16 July 2010 - 01:53 PM' timestamp='1279281223' post='1042']
I can't find anything about its coating, but I guess it has at least two layers, and since it is from the early seventies (1974) and later, I do expect it to have multi-coating. It looks like Mamiya used both Tokina and Contax Zeiss to source lenses from. F.e., the 55 F/1.54 is a Zeiss lens, the 28 F/2.8 a Tokina. The 55 F/1.8 is said to be good, but slightly less so than a Takumar 55 F/1.8, whatever that means. It also looks like this lens is better at the larger apertures than the F/1.4 version, which is something universal based on my own test of 50 mm lenses, with very few exceptions <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/biggrin.gif' class='bbc_emoticon' alt='
' />.
HTH, kind regards, Wim
[/quote]
Some testing required
Or I can always try to resell it on eBay. I just really like the feel of it, and hey, want to have a little old-fashioned fun. I've also started collecting old cameras after a couple nice fold-outs came into my hands. I just love a) second-hand shopping, and <img src='http://forum.photozone.de/public/style_emoticons/<#EMO_DIR#>/cool.gif' class='bbc_emoticon' alt='
' /> old mechanics.
-Lars
