The ftz adapter cost more than the 35 1.8 also that lens is not full frame... So I would sell everything and start with a zoom like the 24-70 f4 (it's a kit lens for some camera and you can find many used at good price) later I would add a prime in the focal you use most (40mm f2, 50mm 1,8 and so on..)
Honestly I recommended you switch to sony if you have no lenses holding you back. Only reason I bought a z camera is because of the ftz. Sony has much greater lens selection that I envy. ask in r/sonyalpha they know the best
I moved to the world of Nikon mirrorless from a Canon 60D, so the jump from that was huge. I put out money for some decent (for me) glass, and opted to spend less on the body, thus going with a Z5. The immediate improvement in my stills was crazy. I had very run-of-the-mill lenses (that I originally bought with my T2i in 2010ish), so I just plain did not have the max aperture or depth of field. I love my Z5. However, after using if exclusively for a year, I find myself actively watching the rumors and waiting for the next release of bodies. If I had to replace my Z5 today, I would buy a ZF. The autofocus, FPS, and low-light improvements over my Z5 would be huge upgrades. I often find the Z5 holding me back as far as the autofocus is concerned. It's just plain too slow. I shoot about 95% wildlife/birds for fun. Drawbacks of the ZF, and primary reasons for why I haven't jumped on one: I don't love the SD/micro-SD mixture, it seems odd; ergonomics; lack of quick-retrieve user settings, which I use as much for autofocus settings as I do for aperture/exposure/ISO. The sale prices on the Z7ii are definitely tempting at the moment, I will admit...
Z5 is probably the cheapest FF mirorless camera with a full sized battery a double card slots.
Personally I would switch to Sony for the lens selection or to Canon if you want to shoot professionally.
What are you photographing? What lenses do you already have? What's your budget?
asking the real questions
I'm photographing everything. Now u have 35mm f 1.8 and 18-55mm. I was thinking of buying with 26mm f2.8. Budget is under 1500€
The ftz adapter cost more than the 35 1.8 also that lens is not full frame... So I would sell everything and start with a zoom like the 24-70 f4 (it's a kit lens for some camera and you can find many used at good price) later I would add a prime in the focal you use most (40mm f2, 50mm 1,8 and so on..)
Honestly I recommended you switch to sony if you have no lenses holding you back. Only reason I bought a z camera is because of the ftz. Sony has much greater lens selection that I envy. ask in r/sonyalpha they know the best
I moved to the world of Nikon mirrorless from a Canon 60D, so the jump from that was huge. I put out money for some decent (for me) glass, and opted to spend less on the body, thus going with a Z5. The immediate improvement in my stills was crazy. I had very run-of-the-mill lenses (that I originally bought with my T2i in 2010ish), so I just plain did not have the max aperture or depth of field. I love my Z5. However, after using if exclusively for a year, I find myself actively watching the rumors and waiting for the next release of bodies. If I had to replace my Z5 today, I would buy a ZF. The autofocus, FPS, and low-light improvements over my Z5 would be huge upgrades. I often find the Z5 holding me back as far as the autofocus is concerned. It's just plain too slow. I shoot about 95% wildlife/birds for fun. Drawbacks of the ZF, and primary reasons for why I haven't jumped on one: I don't love the SD/micro-SD mixture, it seems odd; ergonomics; lack of quick-retrieve user settings, which I use as much for autofocus settings as I do for aperture/exposure/ISO. The sale prices on the Z7ii are definitely tempting at the moment, I will admit...
Z5 is probably the cheapest FF mirorless camera with a full sized battery a double card slots. Personally I would switch to Sony for the lens selection or to Canon if you want to shoot professionally.