- Location
- Tanagra
I don’t have the 25mm 1.4, but the 25mm 1.8 is at least somewhat close for a comparison. I’m not a super experienced macro shooter, but I’m willing to give it a try with some coinage. 
Not to throw fuel on the fire, but it would easily slip into a pocket without any trouble, even with the caps on it, as the caps only add a little extra thickness, probably less than a thicker pinch lens cap. Heck, so far I’ve just held it in my hand when I don’t need it.One thing in the P02's favor over the Raynoxes is that the P02 looks to be significantly smaller, so easier to carry. Hmm... GAS attack!!
I don’t know if I understand the question, but I don’t know if you are asking if it magnifies or not. I don’t think it does, but rather it drastically reduces the minimum focus distance. The specs aren’t easy to find, but I did find them:It is ridiculous that Olympus does not specify the strength of these close up lenses. I have an old MCON-40 where helpfully the 40 indicates 40cm focal length which is 2.5 diopters. Similarly the 250 and 500 in Canon D250 and D500 close up lenses is their focal length in mm.
For comparison the DCR-150 and DCR-250 claim to be 4.8 and 8 diopters although my samples actually measure 4.2 and 7.1 diopters.
Does anyone know what the P01/P02 strength is or care to measure it?
Use the lens to focus a sharp image on a piece of paper or card and measure the card to lens centre distance. A flashlight at the far end of a darkened room is a good image to focus. The lens strength in diopters is 1000 divided by that length in mm.
There are useful close up lens and extension tube calculators here Cambridge in Colour.