Setting OIS with legacy lens?

larryc

New to Mu-43
Joined
Jun 14, 2014
Messages
2
New to the MFT world and enjoying it!
I purchased an adapter to use some old MD lenses (50mm and 135mm) with my E-PM2. I've read that in order to use the optical image stabilization, I should manually set the lens length. But do I set it to the lens length, e.g, 50mm, or do I need to take into account the additional focal length added by the MD to MFT adapter?

photo of my 135mm Ronkinon taken with my Minolta 50mm f2:
lens.jpg
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verbatimium

Mu-43 Veteran
Joined
Jul 17, 2013
Messages
232
Location
Toronto, Ontario
Real Name
Martin
Unless you have a more expensive MD to MFT focal reducer adapter that has glass in it, any standard inexpensive adapter without any glass with not change the focal length of the lens. So a 50mm lens is always a 50mm lens no matter what size sensor you use it on, so you will need to set your image stabilization for a 50mm lens. You do not need to consider the crop factor of the sensor.

If your adapter is indeed a focal reducer (the adapter will have glass in it), you will need to do the calculation of what focal length your lens becomes with those adapters.
 

larryc

New to Mu-43
Joined
Jun 14, 2014
Messages
2
Thanks, that makes sense. My adapter is just an inexpensive adapter, no glass.
 
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