Tag: SLR

26 Apr

What’s the deal with ISO?

Chris Lane / Camera parts, photography / / 0 Comments

In short, ISO is the sensitivity of the film or digital sensor.

To give you the best example of what changes in ISO does to a photo, I made a chart below. Using a ribbon origami rose that I made, these photos are taken with a Canon 40D, so different cameras will have different results. The large picture at the top is taken at the lowest ISO of 100 to show what the entire picture is. Below that I have images of each ISO setting at 1/3rd increments. These are 100% of the pixel size right out of the camera. For each ISO change I had to also change the shutter speed. The aperture was the same in each at f/5.6.
At the beginning I have the two extremes of the highest and the lowest next to each other to show the dramatic difference. Then at the very bottom that full photo is taken with 1600 ISO. The reason I did this is to show, depending on the use (here being the web), a high ISO will still be a suitable option. At this small size on a website, the noise is barely noticeable. But blow it up to a 16×20 print and the difference between them will be quite intense. I very rarely would use 3200 ISO, and isn’t really native to this camera (thus the H). But it is nice to have available in a pinch.

ISO Comparison chart

So what is it all about then?

ISO is a standardization that was
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26 Oct

Camera Basic – Shutter Speed

Chris Lane / Camera parts, photography / / 2 Comments

The shutter is what really makes a camera. In essence a camera is just a box that holds some film or a sensor with a hole in the end that opens and closes to let in light. This is evident from as far back as the camera obscura which helped artists essentially trace a picture of a person to resemble their likeness. Similar to that is the pin-hole camera, where a piece of film or printing paper is placed inside a camera and literally a pin-hole is punched in the other end which can be uncovered to take some surprisingly phenomenal photographs. Only slightly more complex from this is a typical 35mm camera. This can introduce aperture, which is actually dependent on the lens. It also gives the ability to adjust mechanically the time the shutter is open. The size of the opening through the lens dramatically decreases the amount of time that the shutter need be open in comparison to pin-hole cameras. Then with DSLRs (Digital Single Lens Reflex) cameras, the only thing that is really changed is instead of the shutter opening to a silver halide film plane, it opens to a light sensor of some kind. Today the typical is the CMOS sensor, which is beyond the scope of this post to explain.

Shutter speed generally adjusts from 1/8000 of a second to as long as you want it open,
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18 Oct

You must experiment!

Chris Lane / Art, Design, photography / / 0 Comments

Failure to experiment leads to craft shows and chintzy work.

The whole process of creating art is completely subjective and open to interpretation at all bounds. I want to urge everyone to not be afraid to experiment in their work. Artwork can be created by the numbers, but most viewers will be able to tell it is done in a formulaic way. It won’t stand out amongst the crowd. I recently attended a local arts & craft show and I couldn’t count how many people were selling mostly the same stuff. If it wasn’t rock bracelets, it was plywood cutout figures. They might be good at what they do when making those figures, but they weren’t willing to experiment. All of them looked the same, to the point I was wondering if they weren’t homemade but rather being resold from elsewhere. That means that they were either being made from a pattern or the entire genre has simply become stagnant.

The thing about experimentation is that no one has to know. Photography, for example, is great for experimentation. It is so easy to try something new, especially with digital cameras. Try getting lower, to the point of laying in the grass, and get a shot from a worm’s eye view.
Grass closeup

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05 Aug

Aperture on Cameras pt. 2

Chris Lane / Camera parts, Training / / 1 Comment

Used to be…

Minolta X-700 with lens
Older SLR (single lens reflex) cameras, pre-digital info screen, had aperture adjustment on the lens itself. The image shows an example from my Minolta X-700 with a 50mm f/1.7 lens, made in 1983. This camera does, however, have a full auto setting, so that it can adjust the aperture for you. Unfortunately, you cannot tell what it is adjusting to without the digital screen that the somewhat more modern film Canon Rebels had.
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30 Jul

Aperture in Photography pt.1

Chris Lane / Camera parts, Training / / 9 Comments

Aperture, in my opinion, is one of the simplest things to set apart a great photograph. In this first of a two part series I will talk about aperture, what it does and how it works. Part two will cover what you should do with aperture and how to use it effectively with both an SLR and a point-and-click camera.

What aperture is

Aperture in photography is the opening in the lens which lets through light to reach the film or sensor. Inside the lens is a series of metal wings that make up a diaphragm that can be increased or decreased in diameter to let through more or less light. It works like the iris of the eye,
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