That's a great breakdown of the lens. The results at f/1.2 are definitely usable.

Tried that and unfortunately wide open it does zero. I still own this lens though, it has its moments!

There are videos online with people using black construction paper rolled in a cone that is about 8" long and it works just fine. I use a series of lens adapters connected together to make a 8 or 9 inch lens hood and it works fine. I think you might consider how long the hood is before giving up on this idea.

I have heard that some people paint the inside or the barrel black to minimize internal reflections. I haven't done it yet.

You should look into what it would cost to have someone put new coatings on the lens. I have heard of people doing that.

I'd presume it would be better, but not drastically. If I ever get my hands on one I'll post a comparison.

Spacing between the lens and the camera mount sounds like it's too far? You get similar results to yours when adding a 'macro extension tube' to a lens.

I have the same problem. My camera is the Canon R, so I think I just bought the wrong adapter. I also have a canon 6dmii and it doesn't focus either. I'm going to try a new adapter, if they don't work then I'm going to sell the lens.

Late response, but it might help other users. The Canon FL,FD, and nFD, has a flange focal distance at 42mm. Your canon EF mount has a 44mm flange focal distance. In other words, the lens will not focus the image sharply at your sensor at longer distances. You need an adapter with a correcting lens inside. Otherwise you will not be able to focus the lens to infinity.

Not fantastically to be honest, it's ever so slightly shy of infinity I feel, but only just. This was the case with both adapters. Wouldn't be my first choice for landscapes.

These FL and FD lenses need what is known as a Conversion kit. Mounted on their original cameras they were between 4mm and 6mm closer to the film. There were kits being made, then the person died. I still like the lens for use within 6 feet at wide open. Stopped down it can reach what you said. You are making good use of it in your video. I have 2 f1.2 lenses. This one and Olympus OM-System G.Zuiko Auto-S 55mm f1.2 1974. The Olympus is Radioactive 3389 CPM (hot hot hot), but not the FL. I bought both of them this last winter. I like them both. Now this is a heavy lens at 1.05822 lbs, but there are much more heavy lenses out there. Look up the 300mm and 400mm up to the 1200mm lenses. I think the 1200mm is 65 lbs.

I do not unfortunately. I will soon compare it to the FD 50mm 1.4 though if that's of any use to you.

@@JamesClark1991 Qutie a bit actually. I already have an FD 50mm 1,4 It is by far one of my favourite lenses. So seeing a comparrison to an FL 55mm 1,2 would be grand :D

FL to NEX or FL to Sony E-mount

Я не сравнивал эти два объектива. Бытует мнение, что 58-мм модель, к сожалению, еще мягче.

Doesn't need to be mounted technically but the breech-lock pin on the rear of the lens needs to be held in the correct position for the aperture control to work. This is what the adapter does for you when it's mounted to the lens and you set it from "open" to "lock".

For example shown at 02:35 in the video.

@@JamesClark1991 Thank you very much, I managed to release it and that the diaphragm works correctly, now I have to send it to maintenance to use it, regards.

@@JamesClark1991 I want to use it on an A6000 and I see that you have the FOTGA brand adapter, it has worked well for you, because I have read that then the lens is a little loose, again thank you very much

Not experienced on that one sorry buddy! Leica's above my pay grade 😝

Use an FL/ FD to L mount converter. I barely got this lens today and waiting for the adapter to come so I can mount it on my Lumix S1

I'm told it's the equivalent of a chest x-ray.

@@JamesClark1991 It's actually way less. You'd likely have to keep the lens on you for 1000 hours to equal that of a chest x-ray. Maybe don't keep it under the pillow - but normal use is completely fine. Also, i think only one of the internal lens groups contain thoriated glass on this particular model, although i have not opened one up myself yet and tested.

The FL 551.2 is not radioactive. The former 58 1.2 is.