Visual acuity

Do we, photographers, have visual acuity? If we understand visual acuity as the capability of our vision to perceive, detect or identify spatial objects with good light conditions, we should have it. A distance from the constant object, if you see a small letter clearly, you have more visual acuity than another person that does not see it. Well, this is not enough condition to be a photographer, but it is necessary, although I know about cases of blind photographers

I went to the ophthalmologist to do the annual revision and I came up on the beautiful – and at the same time weird – Phoropther. Some time ago I had found a series of photos that I liked a lot about this subject and decided to do my own version. Later I realized that almost all versions of this device were very similar, its design is spectacular and all of us to see it the same way.

The Burns Archives

I remembered the famous photo report that Andreas Feininger made about the photo reporter from Life, Dennis Stock, in 1951 and some self-portraits with similar aesthetic. All these photographs make a reference to the relationship between the optical and the photographic and have a high formal weight.

 © Andreas Feininger

   © Andreas Feininger

The Phoropther has as much formal strength as the Leica and the magnifying glass in the previous photos, which makes it difficult to escape from the typical frontal photography. Aware of this I took the photo and here I explain how it was made.

  El Flaco

As always, I had the invaluable assistance of my friend El Flaco, who is always willing to help in carrying out my photos, as he did incountless times before, as well for the posts of this blog. I also could count on the collaboration from Visionlab, the company where I usually make my optical revisions.

In the first set of lights I placed a translucent umbrella below the camera and the fantastic OctoDome mini from Photofex above. Between them, I put a multipurpose aluminum frame that I made over 20 years ago and that still accompanies me. Before I used the frame to carry two Nikon cameras hanging from my neck with a single belt, but now I use it to put the camera in the axis of the light without the need for an arm and a counterweight for the flash.

Diy bracket

Diy bracket

After some first pictures I saw that the reflexions from the knobs of the Phoropther did not turn out as good as expected and therefor I decided to reverse the set. In the end the best lightning for the apparatus turned out being when the umbrella was placed above the camera. The two flashes I used were Yongnuo 560 with the batteries PB820 from Godox.

El Flaco

Last, I removed the aluminum plate that was on the wall with Photoshop since it distracted some. I also matched the tones of both lights and gave the set a warm dominant.

  Lighting Diagram

Visual acuity.pdf

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It is forbidden the use partial or global of this website unless authors written permission.

From South to North

I usually spend the Christmas holidays in the Southern Hemisphere, while I live in the Northern Hemisphere. Every year around this time I make a ‘Happy Holiday Photography’. This year I had a weird feeling. Crisis, early elections, unstable weather in both continents, the winter did not seem to be winter in the North and summer did not seem like summer in the South. So I made this picture from the inspiration of the times that we live in.

Merry Christmas © Marcelo Isarrualde  Merry Christmas © Marcelo Isarrualde

The hour of the realization of the photography was very important, as I wanted it to still be daylight but I also wanted the street lights to be lit. For a moment I tried with different locations in the neighborhood Raval in Barcelona, since the structure of the urban neighborhood is very diverse and full of passages.

© Marcelo Isarrualde

Because of the high amount of natural light the flash was too dominant and gave the environment an artificiality, but I liked it since it was not a typical ”Christmas look”.

I then tried a darker passage, which had an open window to a bar in it, and the result improved. In this case the illumination of the flash was direct and wide since I wanted to simulate the natural light of the passage itself that is seen in the upper right corner of the photo.

© Marcelo Isarrualde

I put a Yongnuo 560 flash on a monopod with a battery Godox Power Pack PB820. I put it from a lower point of view than the natural light of the passage for the illumination to be flatter and this way we can see the faces of our friends with more sharpness.

© Marcelo Isarrualde

Finally I did some more photographs of the street in the same passage but this time I decided to extend the surface of the light source for the illumination area to be larger, and at the same time be able to decrease the contrast a little.

© Marcelo Isarrualde

I did not want to increase the ISO too much, so I realized the photographs with tripod and very low speed.

Lighting diagram © Marcelo Isarrualde Lighting diagram

From South to North.pdf

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It is forbidden the use partial or global of this webside unless author written permission.

 

My DIY battery

For practical reasons, whenever I can I work with external camera flashes and leave my Bowens studio flashes at home to work on more elaborated pictures. With the external flash, despite having less power and not having a modeling light I am able to get similar lighting conditions. If it is not required for the assignment, why carrying a bigger equipment?

Little by little I equipped myself with a “strobist” light kit and even made my own battery. So today I am happy to introduce you to my DIY battery that I built this summer.

If you have a look at Internet, you will find many sites with examples of people that have made their own batteries. Here I give you some links that I found very useful when I was building mine.

Battery 01

Battery 02

Battery 03

Battery 04

Battery 05

Battery 06

Battery 07

As you can see I have put a fuse, a switch and a charger connector. If I decide to work again on another prototype I will also add a couple of leds as the battery Charge indicator. But so far this requires more time than I actually have. !

If you don’t feel like making your own, I have seen some more affordable models than Quantum, like Phottix PPL-200 or Godox Power Pack PB820.”

My DIY battery.pdf

All rights reserved. © Isarrualde Photography
It is forbidden the use partial or global of this website unless authors written permission.