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Archive for the 'eye' Category

Wednesday, March 8th, 2023

Shooting an ultra fast lens (140mm F1.0) with an ultra large format camera

In short words “this lens is something else”. It’s extremely fast, huge and has a strange focus distance. It was used in Sony CRT Projectors from 1997. I bought it some years ago from a very interesting guy. He had so many more great stuff in his shop and I regret that I did not buy more. It took me some time to find the right opportunity to use that lens. But I think it was worth the waiting. I am glad my friend and former workshop participant Alois Stingl came over with is wonderful ultra large format camera.

Before I could use it, it needed some cleaning, I used a cloth that was soaked with water and just put it on the lens without wiping to avoid more scratches.

with some patience I could clean it.

I measured the lens at infinity to calculate the F-Stop. I measured 135mm and the front element was 145mm That is about a F0.9 lens. But a document I found on the internet told me its more an F 1.0 lens. Still crazy fast.

You can see here how short the focusing distance is. That makes it hard to focus un an ultra large format camera.

When I saw the yellow coating on the front element of the lens, I thought about Mathieu Stern’s video about radioactive lenses. If it really is made of Thorium, it is indeed radioactive, but only for a very small amount. Watch Mathieu’s video to learn more about this Material

Thorium was used to get more light into the lenses back then.

Because the lens is very fast it is still dangerous. If it focuses the sun on something, it will start to burn immediately. That’s the reason you should not put the lens near a window and always put a lens cap on it.

In the video I will show you how easy you can start a fire with that lens

I thought it would be interesting to calculate the crop factor of an 40x50cm ultra large format camera. If you use the common formula to calculate crop factors you will see that this plate size has a crop factor of 0.0067 compared to a full frame sensor. With that you also can calculate the comparable depth of field F-Stop. This would also be F 0.067 compared to F 1.0 on a full frame camera. When I tried to focus on the ground glass, I could barley find something in focus. Thats why you see me focusing for a very long time.

it took quite some time to focus with this very fast lens.
I think this shows pretty well how sensor and plate sizes compare

But there is more. a 140mm lens is a tele lens on a full frame camera, but it’s a wide angle lens on an ultra large format camera. This is because of the bigger plate size of the ULF camera. listen to my full explanation in the video.

My drawing shows in a simple way that the subject needs to be farer away from a full frame sensor the get the same angle of view as the close setup of the ULF camera.

To “connect” the lens to the camera, I designed and printed a basic flange in Tinkercad. It needed some pool line and tape, but eventually it worked out.

I think Tinkercad is one of the most yeas to use tools for 3D printing.
a very basic part, but incredible helpful
No screws, just tape, pool liner and my 3d print. Sounds funny, but worked wonderfully

The next issue was the fact that my darkroom was not made for 40x50cm plates. only for 30x40cm ones. After some tests with smaller plates, we only had one cup of developer left. Beside that, everything starts to get unpleasantly expensive if you pour on plates with this size. So my goal was to make it work with only one attempt. I did some dry runs to get comfortable with everything. Not only the dark room work was something I had to prepare for, but also the camera. These old beauties all have some quirks. Besides that, Alois made a beautiful plate holder by himself. These holder needed also some special attention. But as explained in the video, I love these challenges. It makes the result at the end even more sweet.

To calculate the strobe power I needed, I used my wet plate strobe calculator that I created for my Patreon supporters. Since I made it, I use it all the time for myself, because it makes life much easier with the wet plate process. If you are a fan of analog photography and the wet plate process, have a look at our wet plate conversation magazine on Flipboard. Besides many great stories about our favourite process, you’ll wind there also work from other wet plate artists.

I really like how this portrait turned out. As expected it is very abstract because of the F-Stop and the wide angle lens.Here you can see again how huge that tintype is.

But this is not the end, because of some kind of funny coincidence, a former workshop participant sent me a very similar lens over. I am thinking to do a still life plate with that one. What do you guys think?

Two very similar lenses. Funny how sometimes things turn out.

But there is more, I got also a very tiny lens. I guess I need to build a camera for this one

A full functional lens in the size of a thumb. I haven’t seen such a thing before. What a cutie.

I hope you enjoyed that journey. It took me a long time to finish everything, but I am again glad that I worked through it.

  • Get yourself a beautiful print here: http://prints.mhaustria.com

  • Find all the tools I use here : http://list.mhaustria.com

  • Looking for wet plate gear? http://gear.mhaustria.com

  • Buy me a tea: https://www.buymeacoffee.com/mhaustria

  • Patreon: https://www.patreon.com/mhaustria

  • Get cool analog shirts here http://shirts.mhaustria.com
  •  

    Wednesday, December 21st, 2022

    End Of 2022 Studio Tour

    Maybe you missed my exhibition, or you want to come for a portrait or a workshop. Then you have now a chance to walk with me in a brief overview through my studio.

  • Get yourself a beautiful print here: http://prints.mhaustria.com

  • Find all the tools I use here : http://list.mhaustria.com

  • Looking for wet plate gear? http://gear.mhaustria.com

  • Buy me a tea: https://www.buymeacoffee.com/mhaustria

  • Patreon: https://www.patreon.com/mhaustria

  • Get cool analog shirts here http://shirts.mhaustria.com
  •  

    Wednesday, November 23rd, 2022

    Eyes like you’ve never seen them before! (Iris Ultra Macro Version)

    They say they eyes are the door to your soul – iris photography
    eye surface – iris photography

    As you all know, I am very passionate about portrait photography. And when I shoot portraits, my main focus is always on the eyes. Eyes just attract and fascinate me. Back then when I still was shooting pool billiard tournaments, I started already a series about eyes on the pool table. Its called “the eye of pool”:

    Thats the article from back then (11 years ago) https://blog.markus-hofstaetter.at/2011/08/eye-of-pool-update/

    But now I wanted to go closer and create a more abstract artwork. I started with buying the Laowa 25mm Ultra Macro lens. As explained in the video, I build a whole rig with macro focusing rails and a a linear transition stage.

    That was the first version of my setup. You can see the display in the background that I used for focusing
    This is my Frankenstein focusing rail setup. Its about 2kg by its own.

    Eye movement, ripod movment and head movement was a big issue. For that I build a special kind of headrest.

    the headrest ­čÖé

    I tried different camera/lens setups during my shootings. That is one of them

    thats one version of my lens camera setup – I used many different ones during the shootings.

    At the end I am very happy with the outcome. It was a lot of work, but for me it was totally worth it. I love how these abstract eye photographs turned out on fine art prints. If you want to get a signed fine art print, contact me here: http://contact.mhaustria.com for prints from my shop visit http://prints.mhaustria.com. If you are an ophthalmologist and want to work with me on some of the images, please let me know and contact me.

  • Get yourself a beautiful print here: http://prints.mhaustria.com

  • Find all the tools I use here : http://list.mhaustria.com

  • Looking for wet plate gear? http://gear.mhaustria.com

  • Buy me a tea: https://www.buymeacoffee.com/mhaustria

  • Patreon: https://www.patreon.com/mhaustria

  • Get cool analog shirts here http://shirts.mhaustria.com
  • Posted by Markus | Filed in eye, micro, photography, preparation | 2 Comments »

     

    Tuesday, July 23rd, 2019

    How I got a black eye and diy with collodion process part II

    click or scroll down for the English version

    Das heutige Videoposting behandelt die folgenden Themen:
    Umbauen eines 8×10 Filmhalters um mit Kolloidem-Nassplatten zu Arbeiten
    Erstellen einer Unterst├╝tzung f├╝r eine Gro├čformatkamera
    Erstellen einer Objektivunterst├╝tzung


     

    Und wie ich zu einem schwarzen Auge gekommen bin bei der Nassplattenfotografie.



    Hier noch die Links zu den verwendeten Produkten (alles selbst gekauft)

    Tisch f├╝r die Stichs├Ąge:
    https://www.neutechnik.de

     

    Schrauben f├╝r Kamera und Stativ:
    https://www.fotoschraubenshop.de
    https://www.gerdneumann.net/deutsch/imperial-screws-fotoschrauben-fotogewinde.html



    Fine Art Shop: http://www.markus-hofstaetter.at/pages/front_store/


    N├Ąchste workshops: http://www.markus-hofstaetter.at/pages/workshops/


    F├╝r individuelle Workshops kontaktiert mich hier http://www.markus-hofstaetter.at/pages/kontakt/

     

    Wollt ihr selber eine Nassplatte samt Entstehung erleben – kontaktiert mich einfach http://wetplate.art

     

    Wollt ihr immer auf Letztstand sein, benutzt einfach meinen Newsletter ein Newsletter: https://blog.markus-hofstaetter.at/Newsletter/


    English version

    Todays video blog contains the following diy parts:

    Modifying a 8×10 film holder to work with the collodion wet plate process
    Creating a camera support for large format cameras
    Creating a lens support

    And why I got a black eye using the wet plate collodion process.


    Link to the jigsaw table (I bought everything by myself):
    https://www.neutechnik.de

     

    Camera and tripod screws in Europe:
    https://www.fotoschraubenshop.de
    https://www.gerdneumann.net/deutsch/imperial-screws-fotoschrauben-fotogewinde.html

     

    Fine Art Shop http://www.markus-hofstaetter.at/pages/front_store/

    Upcomming workshops: http://www.markus-hofstaetter.at/pages/workshops/

    For individual workshops please contact me here: http://www.markus-hofstaetter.at/pages/kontakt/

     

    If you guys want to experience yourself how a tintype is made and own a one of a kind wet plate, please contact me via my website http://wetplate.art
     

    DonÔÇÖt forget to subscribe to my Newsletter: https://blog.markus-hofstaetter.at/Newsletter/
     

     

    Tuesday, July 31st, 2018

    Eyecosm – getting close to the eye

    Scroll down for English Version
     
    Die Augen des Menschen haben mich schon bei Portr├Ąts fasziniert. Deshalb habe ich schon in fr├╝heren Projekten Makros vom Auge gemacht. Bei diesem Projekt gehe ich noch einen Schritt weiter und gehe von der Macrofotografie in die Richtung Microfotografie.
    Augen so nahe abzulichten ist um einiges schwieriger, als ich mir vorgestellt habe. Auch wenn die ersten Erfolge vielversprechend aussehen, ist es noch ein langer Weg bis ich den Prozess dazu perfektioniert habe. Sobald die Ergebnisse konstanter werden, werde ich dar├╝ber in einer bekannten Fotografiezeitschrift dar├╝ber schreiben.
     
    Die ersten Ergebnisse k├Ânnt ihr auf der webseite http://www.eyecosm.com sehen.
     
    Hier eine Nahaufnahme von einer Blaugrauen menschlichen Iris.
     

     
    Mehr von meiner Arbeit auf meine Webseite: http://www.markus-hofstaetter.at
     
    F├╝r Neuigkeiten, tragt euch in meinen Newsletter einNewsletter: https://blog.markus-hofstaetter.at/Newsletter/

     
    English Version
     
    Eyes did always fascinate me. That is the reason, that I did macro shots of them some years ago. But this project is pretty different. This time I go more in the direction of micro photography. To capture eyes that close is much more difficult as I thought in the first place. There is a lot improve, Even the first results are promising. As soon as I get more constant in my work, I will write about the whole process in a well-known German photography magazine.
     
    You can find the first results on http://www.eyecosm.com
     
    Here you can find a very closeup of blue-gray human iris.
     


     

    Check out mor of my work on my website http://www.markus-hofstaetter.at
     

    DonÔÇÖt forget to subscribe to my Newsletter: https://blog.markus-hofstaetter.at/Newsletter/
     

    Posted by Markus | Filed in eye, heise, Hensel, macro, micro, photography, studio | Comment now »