Those instructions confuse me. How do we update the lens if we're using the GH3?

http://benjamin-jehne.blogspot.de/p/review-olympus-mzuiko-digital-45mm-118.html

http://betterfamilyphotos.blogspot.ru/2013/12/olympus-mzuiko-45mm-f18-mini-review.html

Underrated lens?

45mm underrated? Are you serious? :-)

i have this lens from the start and only used it once.. it sure is great quality glass but imo i prefer the character of my old minolta lens. also, the filter size and focus ring are not friendly to me.

Hey guys my cent and a 1/2. Rigorously unscientific.
BTW tests show that different lenses may she suited for different jobs/looks/situations, MHO.
Also photography it's another different matter... nevertheless IQ wise (non MTF speaking) these two lenses have some distinct strong personalities... and the Rokkor has this HUGE focus ring that turns and it focus and has no wire and still has numbers in it and focal measurements, wow!!! while the Oly guacamoly it's elegant and barbituric yet light and super tight, uhhhh.
Hope you're sensitive enough to appreciate the hardwork on the video cover, ja ja ja

http://www.samudranil.in/blog/?id=83829329628#.U22nOsKKCUk

Maybe someone can answer this:

On a full frame camera a normal 45mm lens is somewhat wide angle and a 85mm a tele lens. The slight tele lens 85mm features a bit of compressed space and slims the face in an elegant way. So if I use a 50mm designed for full frame and crop it 2x It doesn't have this slight tele function. It is just a cropped normal lens. My question: Is the oly 45mm designed to mimic a true 85mm lens for full frame with the compressed space and slim features or do I get the same results with my 50mm 1.4 takumar or nikon AIS with a 2x crop@100mm?

@Tschechoff

Thanks a lot for this info and since it's all in the normal lens/slight telephoto lens territory I bet the 45mm will perform well on uncorrected raw photos.

But I still need some more information which is more related to my GH4. In 4K the various cropfactor measurements go to near 2.6x and for the new picture aspect ratios it pushes crop factor further even more.

When you look at this post and start doing some serious cropping you'll end up getting wideangle distortions when you think you are using a telephoto lens.
http://www.personal-view.com/talks/discussion/2226/effect-of-lens-focal-length-on-portraits/p1

If the subject is placing his/her hand towards the camera it will appear much bigger on a wide angle than on a telephoto lens. There is no lens correction possible, because the hand covers essential data. It's not possible to correct these individual distances between objects. So lately I'm seriously thinking of swapping the GH4 for a Sony A7s to use a true 85mm and have a lot less problems with hands and feet that point towards the camera. I also enjoy playing with DOF and bokeh.

EDIT: oops my question is answered in the same tread I just mentioned. It is de distance that matters and the relative distance of the camera to the subject and the individual distances between the subject and the hand.

http://www.michaelbriggsphotography.com/tech/olympus-m-zuiko-45mm-f1-8-review-at-the-london-coffee-festival/

http://toolsandtoys.net/reviews/the-olympus-m-zuiko-45mm-f1-8-micro-four-thirds-lens-review/