Truchas Peak, NM - July 2013

[k-hawinkler]

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Shot with Sony NEX-7 + Leitz 560/6.8 with Novoflex Slow Focusing Tube.

 

A January 2012 image is shown here. http://www.l-camera-forum.com/leica-forum/landscape-travel/220599-truchas-peak.html

 

Shot with Sony NEX-5N + Leitz Telyt 560 mm f/5.6, with Visoflex III focusing

[Doc Henry]

Karl,

Impressive mounting and picture !

This allows get even closer isn't ? indeed the mountain seems closer

How many kilometers is the mountain from where you took this photo ?

Best

Henry

[k-hawinkler]

Thanks Henry, your feedback as always is much appreciated. I shot this from my backyard.

The mountain is about 25 miles or close to 40 kilometers line-of-sight away.

 

There was quite a bit of haze in the air.

I seem to have eliminated that in post processing before I converted the image to B&W.

I also took this picture of a somewaht closer mountain range http://www.l-camera-forum.com/leica-forum/2467127-post1459.html.

Here you can see the effects of post-processing in color.

[Doc Henry]

Thanks Henry, your feedback as always is much appreciated. I shot this from my backyard.

The mountain is about 25 miles or close to 40 kilometers line-of-sight away.

 

There was quite a bit of haze in the air.

I seem to have eliminated that in post processing before I converted the image to B&W.

I also took this picture of a somewaht closer mountain range http://www.l-camera-forum.com/leica-forum/2467127-post1459.html.

Here you can see the effects of post-processing in color.

Thank you Karl for the explanation

In the south of France, we also have the mountains, but often there is a slight haze such as you.

I am waiting a day when there is little wind, especially after a rainstorm the weather becomes clear.

Anyway correct mounting to approximate the mountains or other distant subject

Best

Henry

[Karl G]

Karl, beautiful picture and quite a technical set up.

[Iduna]

k.-H.,

 

oh my goodness - a magnificent shot and so translucent, clear and close. Good that you attached the picture of the setup. This also, in spite of respect for the awesome construction, quite funny with the small Nex there like an insect.

[fotografr]

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That lens looks a bit like the old Nikkor 500mm f/5.6 I had many years ago. I was shooting a college football game with it and a young woman came by, paused, then said, "My! What a big.......lens you have."

[k-hawinkler]

Karl, beautiful picture and quite a technical set up.

 

Karl,

 

Thank you, Karl-Heinz.

[k-hawinkler]

k.-H.,

 

oh my goodness - a magnificent shot and so translucent, clear and close. Good that you attached the picture of the setup. This also, in spite of respect for the awesome construction, quite funny with the small Nex there like an insect.

 

 

Iduna,

 

Thank you. Very funny indeed! Small but beautiful!

 

The lens only came with the tripod plate hookup up front.

You only had to look at it and it would vibrate!

Adding the additional pieces turned it into an incredibly stable setup on a solid tripod.

 

I also have a Leitz Telyt 560 f/6.8 with the trombone like focusing mechanism.

Doug Herr from wildlightphoto.com made the most gorgeous bird shots with it.

However, I never could focus accurately enough with that trombone like focusing.

So, I added to it but lost focus to infinity. It does well with hummingbirds though for me.

 

http://www.l-camera-forum.com/leica-forum/leica-collectors-historica/254586-telyt-400-560-mm-f-6-a.html

http://www.l-camera-forum.com/leica-forum/nature-wildlife/254577-hummingbirds-galore-nex-7-telyt-1-a.html

 

I was always amazed about the extreme accuracy with which I can focus the Televit of the Telyt 560 f/5.6.

So, I was searching for a similar setup and found it in the Leitz 560/6.8 with Novoflex Slow Focusing Tube,

appropriately modified. I can focus accurately by turning that little knob/wheel.

 

One more thing (Thank you Steve Jobs for that interesting phrase!)

 

Like the 560/5.6 Telyt, the 560/6.8 Telyt is achromatic and not apochromatic, so suffers from corresponding lens imperfections.

However, one can use that to one's advantage. How?

 

Well, if one is just a tad out of focus one way, the out of focus area turns red, the other way it turns green.

I have excellent color vision, so I know I am focusing precisely if I can't detect those obvious color shifts!

 

Let me say, the 560/5.6 and 560/6.8 work extremely well with the 24 MP of the APS-C sensor with crop factor of 1.5x of the Sony NEX-7.

A full frame camera like my M9 or D800E would need a tad more than 57 MP to match its resolution.

Very nice indeed if one is after great detail in images.

[k-hawinkler]

That lens looks a bit like the old Nikkor 500mm f/5.6 I had many years ago. I was shooting a college football game with it and a young woman came by, paused, then said, "My! What a big.......lens you have."

 

 

Brent,

 

Thank you. Certainly a very observing and funny lady.

Around here nobody bats an eye when they see my lenses.

A lot of the folks have a gun rack with shot guns and rifles in their pickup trucks.

Well, I have my lenses!

[pauledell]

K-H,

 

Impressive results with the big setup. Nice tones and clarity.

 

Paul

[stuny]

Very nice.

[Photoskeptic]

K-H, I had never heard that about the color shits. I'll have to look for them next time. I've been using one on a D800 and that trombone focus is a bear to focus accurately. I like the Novoflex idea, but I finally sold my NEX-7 (good riddance).

 

BTW, I grew up in the Texas Panhandle and spent many vacations in your area in the late 1950's and 60's. Then my parents moved to Clovis while I was away at school. Probably not the same anymore...

[k-hawinkler]

K-H, I had never heard that about the color shifts. I'll have to look for them next time. I've been using one on a D800 and that trombone focus is a bear to focus accurately. I like the Novoflex idea, but I finally sold my NEX-7 (good riddance).

 

BTW, I grew up in the Texas Panhandle and spent many vacations in your area in the late 1950's and 60's. Then my parents moved to Clovis while I was away at school. Probably not the same anymore...

 

 

Hi Photoskeptic,

 

Thanks for the feedback. Really appreciated.

I like wide open country as well. Basically we have been living here since the late 70s.

 

Well, we are talking here about a some times subtle and other times not so subtle effect.

Douglass Herr from wildlightphoto.com refers to this phenomenon as spherochromatic aberration.

 

http://www.l-camera-forum.com/leica-forum/leica-r-leica-flex/275594-telyt-r-560-6-8-puzzle.html#post2341486

http://www.l-camera-forum.com/leica-forum/leica-r-leica-flex/263715-rate-r-telephoto-lenses-best-downward-3.html#post2248081

http://www.l-camera-forum.com/leica-forum/leica-m9-forum/259592-preparing-m-6.html#post2222280

 

So effectively one will see, quote: "green/magenta color fringes in high-contrast out-of-focus details."

 

I have also noticed that with my Leitz Telyt 560/5.6 on M9.

Here is such an example.

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In the following image I tried to correct the problem with the Defringe fucntion in CS6, hopefully without creating other problems.

 

When shooting, one can clearly see this effect, whether shooting with an OVF as in the M9 or D800E, or with an EVF as in NEX-7 to OM-D E-M5.

[k-hawinkler]

Now back to the question how to exploit and demonstrate this annoying feature of older Leitz Telyts for manual focusing? In this case the 560/6.8.

The clue is really in Doug's description, quote: "green/magenta color fringes in high-contrast out-of-focus details."

 

So let's look at a typical scenario where we might encounter this issue.

For example, a water dish set out for the birds.

We are well into our Monsoon season by now, have gotten quite a bit of rain, so New Mexico looks green, at least in my backyard.

Here we go.

 

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I focused on the bright part of the boundary between the water and the dish wall.

Now let's zoom in and show, in this order, how

 

• first slight front focus, then • correct focus, and finally • slight back focus

changes the appearance of that boundary in a viewfinder, be it an OVF or EVF.

 

If your screen is wide enough these images will show side by side and not top to bottom.

 

It's quite striking to see this behavior in the viewfinder and helps me with manually focusing these Telyts.

 

Now, let's Defringe in post and see whether we can correct the appearance?

 

 

You be the judge. But the main focus was on aiding manual focus. Pun intended!

[k-hawinkler]

While I was going through this exercise, nature decided to cooperate and the sun came out.

 

Again, in this order • first slight front focus, then • correct focus, and finally • slight back focus

 

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Here the effect is not subtle at all, in fact it is quite striking!

Please, also note that in the correctly focused image the aberration effect doesn't disappear completely.

However, here one can take advantage of another effect, namely that the radius of specular point lights is minimized when in focus.

 

Now let's Defringe the images.

 

 

 

 

Seems okay when specular point lights are in focus.

[Photoskeptic]

Thanks for posting all those examples, K-H. I'm going over some of the images I took this spring to see if I had the same effect showing up.

[k-hawinkler]

Thanks for posting all those examples, K-H. I'm going over some of the images I took this spring to see if I had the same effect showing up.

 

Thanks. Please, let us know what you find.

 

BTW, the lens featured here http://www.l-camera-forum.com/leica-forum/leica-r-leica-flex/275594-telyt-r-560-6-8-puzzle.html#post2341450 is the actual lens I have.

And if you look at my hummingbird image there closely you will recognize spherochromatic aberration at work in the OOF plumage.