35mm Noctilux Lens

[adan]

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Depends on whether Leica "settles" for f/1.2 or chooses to go all the way to f/1.0 (or 0.95).

And whether Peter Karbe wants the corrections of a floating element (FLE) for close-up quality - or even adds the extra close-focus range of the 35mm APO-Summicron.

Either of which might make the lens physically longer for more physical movement when focusing - and thus need an even wider front element, proportionally.

(Or whether you want ot wait 'til 2030 and the "5th-generation" designs whose goal is supposed to be reducing lens size with unspecified "new technologies" )

I suspect a 35 f/1.2(5) might possibly be squeezed into E49 by permitting a bit more vignetting (the 50mm f/1.0 allowed 3 stops of vignetting at f/1.0).

But I also suspect if Leica does this, they will want to make a "trophy lens" that matches or surpasses anything else on the market (and sells for 5 figures). F/1.0 or f/0.9(5) - and no less than E55 in size (and more like E60 - or larger).

Remember that Zenit already produced this: https://zenit.store/collections/zenit-m/products/35mm-f-1-0-zenitar-for-zenit-m-or-leica-m-cameras

- and Leica won't want second place.

[IkarusJohn]

4 hours ago, sarav said:

I can't compute it but 35/1.0 and 0,67mt would probably means 3 or 4 cm. DoF, not 1mm....and yes aperture nowadays, with digital bodies, is for creative composition only, and it'd marvellous to me. I often use a Summilux 24/1.4 and I seldom close it to 2.0. Bokeh,  watercolor-like pictures... Noctilux lenses are almost perfect for this role.

You’re quite right - I misread the depth of fiel calculator.  I get 18.9cm (30 micron circle of confusion), which is most unfortunately totally useable.  I need to start saving … 

[a.noctilux]

I don't want one 35mm Noctilux 1.0

...

but I need 🤬 one when this will be launched .

[MrFriendly]

60 is the magic number.  I can't remember where I read this, but it determines the limit of how large a lens can be without blocking the rangefinder mechanism.

• 90mm/60 = 1.5
• 75mm/60 = 1.25
• 50mm/60 = 0.83 (currently at f/0.95, so we might see a faster 50mm Noctilux in the future).
• 35mm/60 = 0.58

If there is going to be a 35mm Notilux, it's probably going to be a f/0.7 or f/0.8 (just a wild guess).

[a.noctilux]

Hello @MrFriendly,

I think it's not as easy as that .. even your estimation can be close 😉.

Noctilux 0.7/35mm, 0.8/35mm ! Wow 👍

The large filter size can block the rangefinder path if it's far from the M body,

Just imagine, if we put a very large lens as close to the M body (let's say 2cm), the lens can be wider than 60mm at front without beeing in the RF path...

 

[sarav]

3 hours ago, MrFriendly said:

60 is the magic number.  I can't remember where I read this, but it determines the limit of how large a lens can be without blocking the rangefinder mechanism.

• 90mm/60 = 1.5
• 75mm/60 = 1.25
• 50mm/60 = 0.83 (currently at f/0.95, so we might see a faster 50mm Noctilux in the future).
• 35mm/60 = 0.58

If there is going to be a 35mm Notilux, it's probably going to be a f/0.7 or f/0.8 (just a wild guess).

suddenly 75 and 90 have an awful E67 (not the filter thread, the lens size is awful), 50mm/60 is ok but to me is the biggest you can get, I hope 35 is going to be smaller but @adan wrote clearly what the design problems are.

[Jeff S]

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On 9/12/2021 at 3:54 PM, IkarusJohn said:

I don’t see the point to be honest - of a 35 Noctilux, I mean.  It’s just doing it because they can.  If you consider that the limit at 90mm was the 90 Summilux at f/1.4, and the 75 Noctilux at f/1.25, that tells you something?

Peter Karbe has said on a number of occasions that aperture is for depth of field, and has tried to design and make lenses with the same image quality across all apertures.  He also seems to have decided that f/2 is a perfect lens, giving excellent, usable depth of field.  Would an f/1 35 Noctilux fit with that?  Maybe, but you’d end up with a largish lens (not sure why it would be that much bigger than the 50 Noctilux (apart frm the front element.  But, would a 35mm lens with less than 1mm depth of field at 2 metres really be that useful?

I can’t see myself having a need for such a lens, but who knows?  I like my 21 & 28 Summiluxes …

And yet…

Did I miss something in between these two posts?

Jeff

[IkarusJohn]

Yep, post #102 …

[Ko.Fe.]

Last time I checked, 35 1.2 M mount lens was called as Nokton.

[Capuccino-Muffin]

And 35mm f1.0 was called a Zenit.

[IkarusJohn]

And, your point is?

[a.noctilux]

I bet the next Leica will (would ?) be named, Noctilux-M if 1/35, 1.2/35 or Super-Noctilux-M if 0.95/35 or 0.8/35, 0.7/35.

However what this will be named, I want one 😉.

Those Nokton ...Zenit could be fine but I don't want one of them.