First a Z50 then a Z5

[hap]

Apparently it is Leica microscope.
https://www.google.com/search?q=lei...hUKEwjQo5CBq4H0AhWUSvEDHW4mCMcQ4dUDCA4&uact=5

but if you turn the lens backward it becomes a telescope.

 

[kshapero]

It's a combination of the larger diameter Z mount, and having the focus motors built into the lenses. Plus the new element designs sometimes require more space than the older ones. At least Nikon is now making lenses based on operational requirements instead of mainly aesthetics or convenience. Everyone used to think it was so nice that most Nikkors used the same filter size, but just think of the constraints that put on the lens designers. It was done mainly to satisfy the wants of the photojournalists who needed to change lenses often while covering a story, and didn't want to have to deal with carrying extra filters.

PF

Good points but as a Leica M user, I just can't wrap by arms around those huge lenses. G'day.

 

[farlymac]

Good points but as a Leica M user, I just can't wrap by arms around those huge lenses. G'day.

Oh I understand, Akiva. Once I started using LTM and M lenses I was hooked. But only if using a rangefinder camera. I tend to go with whatever the manufacturer made for their cameras no matter the size...well, except for that Elmarit 2.8/135 with goggles that I replaced with the Tele-Elmar 4/135. I still have the Elmarit though for those just-in-case situations when I might be in need of another stop or two.

PF