Hi there Barry, any news yet from the jury ?
TIA
Hi Bart, hoping that I'm guessing you correctly, that you are looking for a verdict on the CV40mm.
Truth be told, I have not taken all that many pics with this lens since receiving it last month (well not as many as I would have liked to!)...The weather/light has been pretty grim here lately and I'm now just getting over a bout of man-flu :-( ......and all us guys know how bad that can be ;-)
Probably Seb and Carl are the best people to ask if you are looking for a deeper in-look perspective into the Pro's and Con's of the new CV40mm F1.2
Although I did spend a bit of time at home yesterday comparing it against the ZM35/F1.4 (a smallish MF lens that I really do like a lot! which is also fast and close by in FL).
The aperture ring is clicky in the same way as the CV65mm is...The focus ring has less resistance than the 65mm but not sloppy in anyway, it's still smooth and buttery...The 65mm has that Leica lens feel that I like, just the right amount of resistance, which I'm sure you are aware of.
The lens is short (the shortest I own) and remarkably light for a standard FL lens (It does not have quite the same feeling of heft/solidity of the CV65mm though but then it's a lot lighter and I appreciate that), it handles/balances really well on the A7 series cameras, that has a less troublesome girth than the CV65 does if you have big fingers between the lens and the cameras grip.
The lens throw at 120 deg (Inf-0.35m) is very nice indeed...The lens separation of subject matter performs very well indeed WO in the 1.5m - 5m range, giving you that 3D look with nice OoF transitions in the foreground and background (not nervous double edged at all that I have noticed...If you see it, then my PP is to blame).
The lens is chipped for exif data which is handy for auto-profiling in PS etc...although I'm not aware of a LR/PS specific profile yet being released for it to date.
Filters can be fitted inside the lens hood itself, just like my old 58mm CV Nokton does which is great if just wanting to fit a protection UV/Clear filter but awkward if you regularly change filters out, then you would be probably better off IMO leaving the hood off and attaching them directly to the lens itself.
When shooting WO expect to pretty much ALWAYS correct the CA for colour images I find this the most annoying thing about the lens itself....It does clean up nicely though and not really a problem when stopping down.
I do tend to over sharpen and add more structure by comparison to others here, which I do realize has a detrimental effect upon the nice rendering that this lens can produce...Seb's nighttime pictures of Venice are lovely processed in C1 which proves that I'm to blame and not the lens itself.
The lens performs much better stopped down than I first thought and is nearly comparable to my ZM35/f1.4 with front filter correction and shim removed, which I find remarkable!
If you are looking for a thumbs up then I would say...Yes (Value for money the lens is for sure....although that is meaningless in some ways as this lens is fairly unique that has no rivals that I can see as a 40mm FL lens).
It's a nice compliment to your CV65mm with about the right amount of AoV spacing of those two FL's...It also sits in very nicely between your 2 Sigma Art lenses (20mm and 135mm).
It makes for a very versatile lens for travel that even stitches together nicely, that's if you need something a bit wider as Seb has also demonstated earlier.
Hope that helps Bart, wishing you all the very best.
Cheers Barry