GH2 Micro 4/3 to m42?

[Azmyth]

I know I can get an adapter to use my m42 mount lenses.. but I'm on ebay looking and I see a bunch of different "types" some are really thin looking simple adapter, and some are bigger, longer that look to have some other sort of features.. whats the difference?

 

[David W. Jones]

Micro 4/3 focal flange depth is 20mm. M42 focal flange depth is 45.5mm. So the adapter should be pretty good size and not really thin.

 

[fde101]

If the mount is too thin you risk the back of some lenses crashing into the sensor -- and focusing won't line up.

If the mount is too thick you lose infinity focus.

It needs to be EXACTLY the right thickness for whatever particular mount you are adapting.


I got this one and it seems to be working just fine: http://www.amazon.com/gp/product/B002U4PGPI/ref=oh_o05_s00_i00_details

 

[yoclay]

If the mount is too thin you risk the back of some lenses crashing into the sensor -- and focusing won't line up.

If the mount is too thick you lose infinity focus.

It needs to be EXACTLY the right thickness for whatever particular mount you are adapting.


I got this one and it seems to be working just fine: http://www.amazon.com/gp/product/B002U4PGPI/ref=oh_o05_s00_i00_details

You can get that EXACT same one for less than half the price from the Hong Kong guys:
http://www.ebay.com/itm/120786592237?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649

Only difference is that it will probably take a little bit longer to reach you, maybe an extra 5-7 days.

 

[john flores]

I can't be certain without seeing them, but the thin ones may be the kind that adapts M42 screwmount to Pentax K-mount or some other type of bayonet mount. They are designed to not change the registration distance, as M42 and Pentax K have the same registration.

I have a M43 to Pentax K for some of my lenses. I just bought a Pentax Takumar M42, so I do the following:

M42 lens
M42 screwmount to Pentax K adapter
Pentax K to M43 adapter
M43 camera

seems to work fine.

 

[maranfilms]

Azymth, the prices will vary depending on if it has electronics. I have some m42 mount for olympus, but their like Canon in that you cant chane the aperature without an electronic, these adapters are over 100.00.

 

[mcbob]

Here are probably two types you're seeing:
http://www.fotodiox.com/product_info.php?products_id=478
http://www.fotodiox.com/product_info.php?products_id=820

The second product, the "mount with aperture shoulder," has an internal shoulder (you can see it in the pic) to impinge upon a lever that may need to be impinged upon in certain lenses to enable manual aperture. One example would be my SMC Micro-Takumar 100/4 - a straight shoulderless screw mount would lock the "AUTO/MANUAL" aperture switch into the auto position, in which it would not function. My Vivitar 50/1.7 doesn't have such a switch, and thus doesn't need the aperture shoulder.

For the most part, I'd say you're safest getting an adapter with the aperture shoulder.

 

[Azmyth]

hmm fotodiox is out of stock.. is there anyone else who makes them with that shoulder?