Thank you for all answers!
Background: My focus is also portraits and fashion. I have a CCD back for Hasselblad V, a Phase One P45 (non +) with very nice results at base ISO 50 but it has its technical limitations (Firewire, very low ISO, unusable screen if untethered). I love Capture One, that is why I was aiming ideally for an upgrade to a PhaseOne IQ version full frame, USB-C, high quality display and high ISO.
@jaewon: Thank you, I thought about IQ260 - it is a valid option, great display, full frame in MF. Since I think ISO sensibility is still l - base ISO 50 and probably just max ISO 200 that is why I search for the CMOS IQ250, which has higher ISO but is not full frame though
@jaewon I will contact you regarding the IQ260.
@se7en: What are your experiences with the CCD IQ260 in fashion and portraits? How much % are you using the 503 with IQ260 vs XF IQ4 for your fashion shoots and in which situations you use one or the other? The IQ260 still requires an important light quantity, doesn’t it?
@guphotography What are your experiences with IQ260 for Hasselblad H?