anotherMike

Lives in United States Southern US, AK, United States
Works as a Hardware/Software test analyst, photographer
Joined on Mar 30, 2003

Comments

Total: 3, showing: 1 – 3
In reply to:

cosinaphile: i wonder about the apo clain ....afaik the only true apochromatic lens in the world was designed by roger cauldwell and his team of designers

cauldwell is the creator and originator of the first and still worlds finest speedboosters used for viseo and still

the cauldwell designed 60mm f4 technical lens , and arguably the most perfectly corrected lens in the world , marketed by costal mfg anf one other company i think
links below
https://chsopensource.org/2015/02/09/coastal-optical-60-mm-tested-for-technical-photography/

http://diglloyd.com/diglloyd/free/CoastalOptics60f4/index.html

heres an example of the lens on the nikon Z7

https://diglloyd.com/blog/2018/20181031_0200-NikonZ7-Coastal60f4-aseries-BishopCreek.html

i will be very surprised if this extremely red lens is anything near the quality or correction of the cauldwell designed one

AFAIK, the lens is made by Jenoptik, and marketed as the Coastal Optic 60mm F/4. I have not heard of it being sold nor marketed by anyone else.

Link | Posted on Feb 20, 2019 at 19:28 UTC
In reply to:

cosinaphile: i wonder about the apo clain ....afaik the only true apochromatic lens in the world was designed by roger cauldwell and his team of designers

cauldwell is the creator and originator of the first and still worlds finest speedboosters used for viseo and still

the cauldwell designed 60mm f4 technical lens , and arguably the most perfectly corrected lens in the world , marketed by costal mfg anf one other company i think
links below
https://chsopensource.org/2015/02/09/coastal-optical-60-mm-tested-for-technical-photography/

http://diglloyd.com/diglloyd/free/CoastalOptics60f4/index.html

heres an example of the lens on the nikon Z7

https://diglloyd.com/blog/2018/20181031_0200-NikonZ7-Coastal60f4-aseries-BishopCreek.html

i will be very surprised if this extremely red lens is anything near the quality or correction of the cauldwell designed one

You might want to get his name right: It's Brian Caldwell who designed the Coastal Optics 60.

He's also did the optical design for the Panavision Primo 70 cine lenses among other things...

-m

Link | Posted on Feb 20, 2019 at 18:13 UTC
On article Roger Cicala compares three 24-70mm F2.8 lenses (136 comments in total)
In reply to:

marike6: What did we learn? That the 24-70 Nikkor is still the best standard zoom money can buy, the D800E the highest resolving camera DSLR in existence, and that the Tamron 24-70 VC, especially on the D800, is a great value.

What we learned was nothing more than two things:
#1) At 50mm on optical bench testing, the Canon 24-70 is superior
#2) The combination of body + lens greatly influences the overall sharpness

What is left unanswered are how the lenses in question compete at the various distance ranges (since lens performance often varies by focus distance), at focal lengths other than 50mm, and of course a variety of other parameters.

What should also be thought about more is at what point is sharp enough, sharp enough. If you peruse the Zeiss MTF white paper (google it), you'll see that even the slighest miss on your focus results in a pretty drastic MTF drop. Point being, how many photographers actually nail, 100%, focus, on a top tier tripod, in light with no atmospheric issues, where on a large print you could tell the difference between the 1st and 2nd best lens mounted on equal resolution cameras? IMO subjective quality differences will be seen more than a slight MTF 'win' in my experience.

Link | Posted on Jan 31, 2013 at 18:37 UTC
Total: 3, showing: 1 – 3