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Concave wonder - Ultron 50mm
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PostPosted: Tue Dec 03, 2019 5:37 pm    Post subject: Concave wonder - Ultron 50mm Reply with quote

Carl Zeiss Ultron 50mm f/1.8 and Sony FF.






I read somewhere that this is not the only lens with a concave front element, but I can't find any reference to any other such lens. Does anybody have any insight on this? Regardless, this lens is from a different planet: because of the concave front element, because of its name, and more than anything because of image quality....

More pictures here: https://fourbillionyears.org/carl-zeiss-ultron-50mm-f-1-8/

Friends


PostPosted: Tue Dec 03, 2019 5:46 pm    Post subject: Reply with quote

I love this lens! Like 1


PostPosted: Tue Dec 03, 2019 7:00 pm    Post subject: Reply with quote

Yeah, W A Tronnier's masterpiece! happy to have one fro long, too!!


PostPosted: Wed Dec 04, 2019 3:21 am    Post subject: Reply with quote

kds315* wrote:
W A Tronnier's masterpiece!


A masterpiece indeed! They don't make lenses like this any longer Crying or Very sad Crying or Very sad


PostPosted: Wed Dec 04, 2019 3:55 am    Post subject: Reply with quote

http://forum.mflenses.com/concave-lenses-list-t36591.html


PostPosted: Wed Dec 04, 2019 4:48 am    Post subject: Reply with quote

visualopsins wrote:
http://forum.mflenses.com/concave-lenses-list-t36591.html


Like 1 Like 1 Like 1


PostPosted: Wed Dec 04, 2019 8:11 am    Post subject: Reply with quote

Like 1 Like 1


PostPosted: Thu Dec 05, 2019 10:20 pm    Post subject: Reply with quote

Excellent!!!!!

Now. What about the flaring resistance?

IT's a single coat lens of the end of the 60's

Lateral CA?

I read that the sweet of the lens is from F/4 to f/8 as the average. Is it true?

The rendering of the Ultron and of the Rollei made planar 1,8/50 hft are the same? Any better?

Thank you


PostPosted: Thu Dec 05, 2019 10:23 pm    Post subject: Re: Concave wonder - Ultron 50mm Reply with quote

fourbillionyears wrote:
Carl Zeiss Ultron 50mm f/1.8 and Sony FF.






I read somewhere that this is not the only lens with a concave front element, but I can't find any reference to any other such lens. Does anybody have any insight on this? Regardless, this lens is from a different planet: because of the concave front element, because of its name, and more than anything because of image quality....

More pictures here: https://fourbillionyears.org/carl-zeiss-ultron-50mm-f-1-8/

Friends


AFAIK, the canon 2/35 had it too.


PostPosted: Fri Dec 06, 2019 12:05 pm    Post subject: Reply with quote

papasito wrote:
Excellent!!!!!

Now. What about the flaring resistance?

IT's a single coat lens of the end of the 60's

Lateral CA?

I read that the sweet of the lens is from F/4 to f/8 as the average. Is it true?

The rendering of the Ultron and of the Rollei made planar 1,8/50 hft are the same? Any better?

Thank you


You can see some examples here:

http://forum.mflenses.com/request-test-info-summicron-r-50-vs-zenitar-50-1-7-t81077.html#1531185


PostPosted: Sun Dec 08, 2019 6:49 pm    Post subject: Reply with quote

papasito wrote:
Excellent!!!!!

Now. What about the flaring resistance?

IT's a single coat lens of the end of the 60's

Lateral CA?

I read that the sweet of the lens is from F/4 to f/8 as the average. Is it true?

The rendering of the Ultron and of the Rollei made planar 1,8/50 hft are the same? Any better?

Thank you



I have not found flare to be a problem, at least not any worse than later T* coated lenses.

Regarding CA I have not been bothered by it, and it is in any way quite easy to fix during editing.

The lens is fantastic at any aperture - yes perhaps it is sharpest around f/5.6 (e.g., the B&W cat portrait), but even fully open it is magnificent

I have no experience with the Rollei lens, so can't comment on that.

I hope this helps!!


PostPosted: Tue Dec 10, 2019 1:01 am    Post subject: Reply with quote

wolfhansen wrote:
papasito wrote:
Excellent!!!!!

Now. What about the flaring resistance?

IT's a single coat lens of the end of the 60's

Lateral CA?

I read that the sweet of the lens is from F/4 to f/8 as the average. Is it true?

The rendering of the Ultron and of the Rollei made planar 1,8/50 hft are the same? Any better?

Thank you


You can see some examples here:

http://forum.mflenses.com/request-test-info-summicron-r-50-vs-zenitar-50-1-7-t81077.html#1531185


Thank you


PostPosted: Tue Dec 10, 2019 1:01 am    Post subject: Reply with quote

fourbillionyears wrote:
papasito wrote:
Excellent!!!!!

Now. What about the flaring resistance?

IT's a single coat lens of the end of the 60's

Lateral CA?

I read that the sweet of the lens is from F/4 to f/8 as the average. Is it true?

The rendering of the Ultron and of the Rollei made planar 1,8/50 hft are the same? Any better?

Thank you



I have not found flare to be a problem, at least not any worse than later T* coated lenses.

Regarding CA I have not been bothered by it, and it is in any way quite easy to fix during editing.

The lens is fantastic at any aperture - yes perhaps it is sharpest around f/5.6 (e.g., the B&W cat portrait), but even fully open it is magnificent

I have no experience with the Rollei lens, so can't comment on that.

I hope this helps!!


Thank you, very much