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Author Topic: Small zoom lens with a diameter less than 60mm?  (Read 552 times)

wallpaperviking

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Small zoom lens with a diameter less than 60mm?
« on: May 20, 2022, 10:06:08 am »


Very strange question I know but am just wondering if there is a compact zoom that is less than 60mm in diameter?  The only one I can think of is the Leica WATE (16-18-21).  It can be manual focus or autofocus and any system down to M43. 

Ideally in the range of 37-70mm but extra on either side would be great. 

This for a custom DIY project and needs to be less than 60mm. 

Thanks in advance! :)

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degrub

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Re: Small zoom lens with a diameter less than 60mm?
« Reply #1 on: May 20, 2022, 10:17:07 am »

does it need to be designed for a digital sensor or film ?
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wallpaperviking

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Re: Small zoom lens with a diameter less than 60mm?
« Reply #2 on: May 21, 2022, 01:10:35 am »


Can be either..  Will be used on a digital camera but I am sure a film era lens used via an adapter will do the trick..
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Paul_Roark

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Re: Small zoom lens with a diameter less than 60mm?
« Reply #3 on: May 21, 2022, 11:53:42 am »

The Leica-M 28 - 50mm fits the diameter requirement.  It's probably still available on the used market.  Frankly, I don't think it's up to the 16 - 21mm optical quality.

Paul
www.PaulRoark.com
« Last Edit: May 23, 2022, 06:38:18 pm by Paul_Roark »
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wallpaperviking

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Re: Small zoom lens with a diameter less than 60mm?
« Reply #4 on: May 21, 2022, 10:59:30 pm »


Sorry, could not find a Leica M 18-50mm, can you link to it please?  Thanks! :)
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armand

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wallpaperviking

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Re: Small zoom lens with a diameter less than 60mm?
« Reply #6 on: May 22, 2022, 07:14:44 am »


armand..  Good One, that may just work!  Thanks! :)
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Paul_Roark

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Re: Small zoom lens with a diameter less than 60mm?
« Reply #7 on: May 22, 2022, 11:47:03 am »

Sorry, could not find a Leica M 18-50mm, can you link to it please?  Thanks! :)

Sorry, typo,  28 - 50mm.

https://www.leicashop.com/classic/Leica/M-System/Lenses/Wideangle-Lenses/Tri-Elmar-M-4-28-35-50mm-ASPH./

I could not find the Leica official info on it that included MTFs, so I posted the old one I had at https://www.paulroark.com/TriElmar-28-50.pdf .

Paul
www.PaulRoark.com

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wallpaperviking

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Re: Small zoom lens with a diameter less than 60mm?
« Reply #8 on: May 23, 2022, 04:50:53 am »


Good One!  Thanks!  So the 28-50mm is like the wider version, in that it is essentially 3 primes in one?  It does not cover the focal range in between?

Might still work but ideally I am looking for a traditional "zoom" lens.  That range would work though..

Any others? :)
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degrub

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Re: Small zoom lens with a diameter less than 60mm?
« Reply #9 on: May 23, 2022, 09:11:35 am »

do you need "flat field" ?
What about achromat needs ?

is this for 3D objects or 2D ?
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Paul_Roark

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Re: Small zoom lens with a diameter less than 60mm?
« Reply #10 on: May 23, 2022, 12:47:00 pm »

> So the 28-50mm is like the wider version, in that it is essentially 3 primes in one?

Yes.

> It does not cover the focal range in between?

Correct.  The images taken when between the marked settings are soft.  The name "Tri Elmar" is appropriate.  It's not a zoom.  I has 3 reasonably good settings: 28, 35, and 50.  Frankly, I consider it a "35mm + and -".  The 35mm is the best, the others convenient additional settings.

That said, I don't use the lens any more.  The Leica apo 35 can do it all better.

Paul
www.PaulRoark.com
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wallpaperviking

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Re: Small zoom lens with a diameter less than 60mm?
« Reply #11 on: June 06, 2022, 03:54:11 am »

do you need "flat field" ?
What about achromat needs ?

is this for 3D objects or 2D ?

Thanks, it is photographing a flat subject...  :)
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wallpaperviking

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Re: Small zoom lens with a diameter less than 60mm?
« Reply #12 on: June 06, 2022, 03:55:42 am »

> So the 28-50mm is like the wider version, in that it is essentially 3 primes in one?

Yes.

> It does not cover the focal range in between?

Correct.  The images taken when between the marked settings are soft.  The name "Tri Elmar" is appropriate.  It's not a zoom.  I has 3 reasonably good settings: 28, 35, and 50.  Frankly, I consider it a "35mm + and -".  The 35mm is the best, the others convenient additional settings.

That said, I don't use the lens any more.  The Leica apo 35 can do it all better.

Paul
www.PaulRoark.com


Thanks, I am looking a for a traditional zoom that I can use all of the settings...   Does one exist I wonder?

Thanks in advance! :)
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