Rank Taylor Hobson f4 4.5" Copying Lens for micro

[kds315*]

This is a highest resolution lens (fully open i.e. diffraction limited 175lpm center, nowhere less 50 lpm) made many years ago
for micro miniaturisation that I have since long. Took it for a walk on a dull, frosty day. All shot fully open.

















Full set is here: http://www.flickr.com/photos/kds315/sets/72157638112709943/

[kds315*]

Contra Lucem / High Key






Sharpness:




Bokeh:






and two for the season:

[Attila]

frost did give additional resolution nice series, so real!

[kds315*]

Thanks, it works very well to show how sharp it is and it looks so nicely sugar coated!

[caspert79]

Seems to be a great lens, impressive results!

[pavko]

Impressive I must say

[danikatia]

[RSalles]

Wonderful rendering, really nice results!

Renato

[kds315*]

Thanks guys!

[ForenSeil]

Hmm... crispy Interesting lens you've found!
First one is my fav
Thanks for sharing!

[philslizzy]

Super sharp! Was this lens made for microfiche copying? Lets see a photo of it.

Lovely photos too, great technique.

[Ray Parkhurst]

My kind of post! Nice results. Looks to be about 1:4 mag or so? This is a lens that I'd never run across here in the SF Bay Area. Most of the macro stuff I find around is related to electronics manufacturing, inspection systems, etc and it's almost all Nikon, Canon, or occasionally Zeiss or Leitz. I second the motion to have a picture of the lens...Ray

[kds315*]

Well, even the historical lens department of Cooke Optics (Taylor, Taylor Hobson resp. its successors) in Leicester does not
know about that lens, so it must have been very special indeed. It was made for "micro miniaturisation" optimized for 1:10,
so I would guess it was for early integrated circuit (IC) production etc. - the first step, as it image field is rather large and
teh lens is optimized for visible light and not for UV as later lenses. So it basically was a competitor to Zeiss' special S-Planar
lenses also optimized for that same purpose.

The lens is back in my lens vault, so will take a while till I have access to it again...

[kds315*]

Just found that such a lens was sold in May 2013, so here is the only pic of it that I could find:



It might well be that this is a descendant of the former TTH Copying lens for 1:1 (that I also have) invented by
Gordon COOK in 1952, filed as US Patent 2600207, a symmetrical 8e/4g modified double Gauss design (which
itself is derived from the famous design of William H LEE's OPIC lens)

[ZoneV]

[Fons Baerken]

Excellent series Klaus

[iangreenhalgh1]

Beautiful work Klaus.

I love TT&H lenses, I don't have many but they all have such a feeling of quality. Even my 1912 Cooke triplet shoots superbly well on digital, better than many modern lenses.

I've read some reports from people on the TT&H Copying lens, they are said to make superb taking lenses for LF.

Interesting to know that this one has a large image circle, I wonder just how big the coverage is?

[kds315*]

Thanks guys!

Ian, my lens is not related to those TTH Copying XEROX lenses that the LF people use, that is a different beast.
Mine was once made for micro chip making, as I have the data.