TimoK

Has it ever been that "raw raw" ? I think the "raw" has always been "what a camera writes". And what is the camera today? A computer with a lens and a sensor.

Btw. Donald, do you know how do cameras manipulate raw files?

Thank you.😎 Yes, my lens is the version 4. The biggest aperture 4,5 is engraved with comma, not dot as I wrote in my post. Its 4,5/105mm at the lens body.

This is great! You can show how a cube in 3D space becomes a hexagon in 2D.👍😍 And that with your colours!

Btw. My Componar is a very good ball machine at wide open. I don't need (m)any more Meyer Trioplans when I have that Componar and Travegar.

I think most lenses are at their best shooting distances at around 10ft/3m. And most pictures are taken focused at distances between 1 to 5 meters.

Many macro lenses are claimed to be optimized for 1:1 magnification, but that's maybe not true. My experience is that my macros are fine at magnifications from 1:10 to 1:2 but not so good at 1:1 or higher. But seldom I shoot at the life size. Do you?

I'm sure the same formula can be adjusted. What is even more interesting the very same lens without any adjusting can render as well at close-ups as landscapes!

Componar 4.5/105mm at f/8. Surprisingly Schneider went hexagonal with this three element lens!

Edit. Now I'm not sure of the lens design. I found the diagram of this lense's successor Componar-S. It was a four element in three groups design. Maybe this older one too?

Did you know that Fujifilm made Hasselblad H lenses ?

Precious Memories got my soul:
www.youtube.com/watch?v=fZCycPwo8ZM

I'm sorry. I misunderstood your message. 😢

Sometimes it happens for eager hobbyists that they start to admire the subject of their hobby so much that other people call them biased. And sometimes they really are biased.
In photography forums I've seen the word fanboy many times. I think it is insulting. Sometimes there are wars between fanboys of this or that brand. Sad to read.
If you read simplejoy's article, you might critisize him as fanboy of Tominon.
I think that's not the case. He is very interested in Tominon / Tomioka lenses and researching them, but a fanboy? If you think so, I don't buy your opinion .

Great articles!👍 And so pleasantly illustrated with simplejoy's mighty pictures! 😋 If you can't read you can enjoy only looking at the photos of the lens article.

Thank you for using that huge amount of be... ehm, huge amount of your time and energy to do that work! 😍

The lighting seems to have changed between these shots. Like there was a reflector or fill flash in the 720x shot. Better it is anyway.

There's so much color aliasing and contrast in the DCS720X shot.

My use case for that tool is mounting and unmounting the view camera lenses to the lens plates. I'm going to screw and unscrew the retaining ring. It's routine with those lenses, not destroying healthy lenses. I have more lenses than lens plates. So, I have sometimes to unmount an old * lens and to mount the new * one to the lens plate.

*Old and new are very relative terms when speaking about my lenses.

Thank you, this is the answer to the question I was asking. 👍

Yes I agree. More a presentation than a movie. A little too quick for a movie, I had to stop at almost every slide to read the content. Still interesting.

Nice pictures again!👍

But, isn't it Too hexagonal? Not too hexy.

Try to sing it: "I'm too hexagonal for my cat. I'm too hexagonal for my hat. I'm too hexagonal!" 😂😜😎

Very nice again!😍
I see you have balanced the hexagonal bokeh balls with the Swan Stabilo pens or should I say stabilised?😏

Do you know anything or do you have own experience with Tominon 75mm lens also made for Polaroid MP4 for macro?
I read somewhere, maybe in Delta lenses, that it's reversed Tessar type and quite OK.

Btw. did you see this www.youtube.com/watch?v=CsYbvniACtw ?

Apo-Digitar M 120mm f/5.6 is the very same lens as a little older Makro-Symmar HM. It was sold as optimized to 1:1 and recommended from 1:4 to 4:1 magnifications.
I think it is very good from 1:10 or 1:8 to 1:1. At bigger magnifications it starts to become softer, or so I feel. But everything shot over life size is very prone to user errors.

I don't remember who it was, but I also have read that claim. I thought it was Rob de Loe when you said so. Anyway, it's image quality is not acceptable focused at infinity. If I remember I took F8 and F11 shots. That is stopped down a bit, isn't it? Btw. who's Mark?

Yes, it was Apo-Componon HM earlier. My Apo-Digitar L 80mm f/4 was Componon-S before it turned to digital...😇 It is also very sharp and free from CA's at landscapes. I have not tested it at near distances. I have to check it some day.

Or more marketing than anything else!
I think photographers seldom shoot at 1:1 magnification. More often they need macro lenses for 1:8 - 1:2 shots. But it's nice to know that my lens performs fine even closer than I need.

Nothing to complain about your pictures.😅 They are fine.
But I complain about Rob's claim. I checked this with my Apo-Digitar-M a couple of years ago. Almost at infinity, focused to ~ half a kilometer, the image circle, or with Rob's term, the circle of good image quality was not even covering the FF frame. I have better lenses to landscapes. But not better ones to shots at near to life size!😏

Symmar-S 135mm is quite good a lens to close-up work too. Here around 1:3 at f/8.

I see a Thorlabs spanner wrench on your table. Do you think it's good / worth of it's price?

I agree their policy. I have so many times opened the screws in my old lenses and then when reassembling them broken them.

I think almost all macro lenses were optimized at 1:1, or said to be so. Nothing to do with focal length.
For excample the Makro-Symmar was sold for photographers as a lens 1:1 optimized, but usable from 1:4 to 4:1 magnification.
For scientific purposes they sold (are still selling) four different versions at fixed magnifications.

Those lens designers say that you can make a lens with peaking sharpness at one magnification or a lens which is quite sharp at wider range of magnifications, not both at the same lens. The floating elements are made to correct this limitation.

No, too expensive for me. I'm aware of Jim's writings but... If you need a lens for only one magnification, maybe Schneider's industrial lens could be a good solution.
If you need wide range of magnifications, you'll need four of them.
Btw. did you know they are Pyrites now? schneiderkreuznach.com/en/company/news/newsroom/lens-renaming

And one more link: www.cambo.com/en/actus-series/actus-b-mini-view-camera/actar-105-hr-macro/