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The Petzval lens



 
 
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  #1  
Old August 22nd 13, 01:21 PM posted to rec.photo.digital
Sandman
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Posts: 5,467
Default The Petzval lens

They just about manages to hit their goal of $100,000 ... about 13 times
over, in one month!

http://www.kickstarter.com/projects/...phy-petzval-po
rtrait-lens/

45 hours to go, then the project will start for real. They've put up
some test shots the last few days, like this f2.2 one:

http://cdn.lomography.com/downloads/...-petzval-kicks
tarter_update_15_aperture_2-8.jpg

Which isn't really all that sharp in the middle, but that was part of a
aperture testing series. Here's another one:

http://cdn.lomography.com/downloads/...-petzval-kicks
tarter_update_14_canon-5d_closeup.jpg

Which quite nicely captures the iconic petzval effect. These are test
units and they're apparently tweaking them all the time. Here is one
where sharpness can be judged:

http://cdn.lomography.com/downloads/...-petzval-kicks
tarter_update_14_portrait_lens.jpg

It's not a supersharp lens by any stretch of the imagination. Another
full resolution image:

http://cdn.lomography.com/downloads/...-petzval-kicks
tarter_update_14_canon-5d_bird.jpg

This is an amazing shot, and I love this effect, but again, it's not all
that sharp in the center.

A DX shot:

http://cdn.lomography.com/downloads/...-petzval-kicks
tarter_update_14_nikon-d3200_street.jpg

Very blurry.

I don't need it to be super sharp, but I would want it to be sharper
than this. I don't know if they've used live view when focusing.

Anyway, exciting lens!

--
Sandman[.net]
  #2  
Old August 22nd 13, 01:23 PM posted to rec.photo.digital
Sandman
external usenet poster
 
Posts: 5,467
Default The Petzval lens

In article ,
Sandman wrote:

http://cdn.lomography.com/downloads/...-petzval-kicks
tarter_update_15_aperture_2-8.jpg

Which isn't really all that sharp in the middle, but that was part of a
aperture testing series.


And viewing another sample, with f11:

http://cdn.lomography.com/downloads/...-petzval-kicks
tarter_update_15_aperture_16.jpg

It's obviously sharper, so the question remains if the large aperture
blurs the images this much or if they just didn't manage to focus it
properly.


--
Sandman[.net]
  #3  
Old August 22nd 13, 09:59 PM posted to rec.photo.digital
Eric Stevens
external usenet poster
 
Posts: 13,611
Default The Petzval lens

On Thu, 22 Aug 2013 14:21:07 +0200, Sandman wrote:

Here is Jonas's article with unwrapped URLs:

They just about manages to hit their goal of $100,000 ... about 13 times
over, in one month!

http://www.kickstarter.com/projects/lomography/the-lomography-petzval-portrait-lens/

45 hours to go, then the project will start for real. They've put up
some test shots the last few days, like this f2.2 one:

http://cdn.lomography.com/downloads/kickstarter/lomography-petzval-kickstarter_update_15_aperture_2-8.jpg

Which isn't really all that sharp in the middle, but that was part of a
aperture testing series. Here's another one:

http://cdn.lomography.com/downloads/kickstarter/lomography-petzval-kickstarter_update_14_canon-5d_closeup.jpg

Which quite nicely captures the iconic petzval effect. These are test
units and they're apparently tweaking them all the time. Here is one
where sharpness can be judged:

http://cdn.lomography.com/downloads/kickstarter/lomography-petzval-kickstarter_update_14_portrait_lens.jpg

It's not a supersharp lens by any stretch of the imagination. Another
full resolution image:

http://cdn.lomography.com/downloads/kickstarter/lomography-petzval-kickstarter_update_14_canon-5d_bird.jpg

This is an amazing shot, and I love this effect, but again, it's not all
that sharp in the center.

A DX shot:

http://cdn.lomography.com/downloads/kickstarter/lomography-petzval-kickstarter_update_14_nikon-d3200_street.jpg

Very blurry.

I don't need it to be super sharp, but I would want it to be sharper
than this. I don't know if they've used live view when focusing.

Anyway, exciting lens!

--

Regards,

Eric Stevens
  #4  
Old August 22nd 13, 10:01 PM posted to rec.photo.digital
Eric Stevens
external usenet poster
 
Posts: 13,611
Default The Petzval lens

On Thu, 22 Aug 2013 14:23:31 +0200, Sandman wrote:

In article ,
Sandman wrote:


Unwrapped:


http://cdn.lomography.com/downloads/kickstarter/lomography-petzval-kickstarter_update_15_aperture_2-8.jpg

Which isn't really all that sharp in the middle, but that was part of a
aperture testing series.


And viewing another sample, with f11:

http://cdn.lomography.com/downloads/kickstarter/lomography-petzval-kickstarter_update_15_aperture_16.jpg

It's obviously sharper, so the question remains if the large aperture
blurs the images this much or if they just didn't manage to focus it
properly.

--

Regards,

Eric Stevens
 




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