Thank you, Fred!
These MTFs don't look very promissing. These lenses are really just good for 30x30mm..
Henrik and others consifering mfdb,
It is flat amazing of the above "experts" on mfdb that do 1) not shoot mfdb and/or 2) never produced good images with mfdb, and not so with latest backs. I suggest to ignore them and what they claim of lenses etc and listen to those actually using the systems with the backs you are considering. Fred seems on his personal crusade against mfdb, per his other threads in these forums...
Viewfinder is very bright, but problem is : that it is very hard to focus (MF) with 80Mp back.
I do shoot with 80MP Leaf AFi-II 12 back on Rolleiflex Hy6, check my website andersloof.com, where all beauty images and the first number shots under China from Yuen Yuen is with this combo.
I prior used 28MP Leaf on Mamiya 645AFD III including some of Mamiyas best lenses. Following is my experience.
The Rolleiflex Zeiss lenses are similar to Hassy V lenses (some of them sharper still, and the 110/2 more legendary than the Hassy version), while the Schneider are arguably sharper still, to point of being the sharpest in medium format and sharper than 35mm lenses. Yet they have very similar wonderful characters as Hassy V lenses!. I get perfect sharp focus and images, assuming I hold the camera still. All those I referenced were shot hand held and some significant lower shutter than I prior shot my Mamia with. Why?
1) Focus accuracy of Hy6 is very precise indeed, both AF and using focus indicators the MF. AF makes simple to nail the shot per considering the size of the focus sensor.
2) because I use WLF finder I do not have to lift the weight of camera up to my head, but instead cradle hold the camera which is a more steady supporting means to hold a camera.
I only use two lenses, a Schneider 80mm AF PQS Xenotar 2.8 and a Zeiss 50mm Distagon FLE. Both are very very sharp indeed, and the FLE per what I know is much similar to the Hassy V version. The Xenotar is arguably the sharpest and best character lens I have ever owned and is nearly glued to camera...
The Hy6 is like a modern version of Hassy V but with better ergonomics and balance, and with AF and more. I am very happy with this camera. It has improved my photography because I see better on the large 6x6cm focus screen and how the camera handles. It seems most who have used the camera states it to be the best camera for MFDB. I found Mamiya AFDIII system with lenses terrible in comparison.
Leaf also offere the new Credo back for Hy6 camera, but the AFi-II version offer rotating sensor and tilt display that the Credo do not. I find them very useful indeed and will not upgrade. Additionally DHW at Photokina announced their Mod 2 of Hy6 camera and that they had been given rights to further develop it. That is good news indeed. My Leaf agent in Hong Kong introduced me to Hy6, and I am happy he did. It is the best system for digital I ever shot.
The files from the 80MP back are superb. Like I said it does quire steady hand and I have to keep reminding myself of this. Personally I believe I would have failed to get as steady shots using 80MP on Mamiya 645 system, thus same issue may even be for Hassy H since requires lifing weight of camera to head level, and I believe Hassy V has weekness of not same well ergonomically as Hy6 and because you on V focus with focus screen. Do note that 80MP do require to hold camera very steady. Of course if you would like you can use also 45 and 90 degrees finders, the 45 is the brighter of them but WLF is even brighter.
I expect someone sitting in couch may now make a search of mtf for the Rollei 110/2 and argue it is not fully sharp across the frame. Then is time to ask if viewers will pixel peep or actually look at the pictures produced??? As amateur I am not getting the 110/2 because $$$ etc, but instead get a similar character using my Xenotar and extension ring using near focus. My argument is that the image is what matters and that e.g. Mamiya with e.g. 45mm D has considered only sharpness and lost out on characters. I found the 45mm D a boring lens and love my Xenotar. That 110/2 and all Rolleiflex lenses have their own lovely characters just like the V lenses... and are very sharp indeed in right condition. The Xenotar is tack sharp using 80MP @ f/2.8 indeed...
I hope above helps. Feel free to PM for more.