More with the Pin Hole

Everyone reached the department by 9.45. It was a pleasant surprise for everyone to see each other put in their best. Sreecheta was there too. I did not mention her last blog post to anyone. But something told me they all had read it. Later when Mr. Tanmay asked Soumee what she thought of it, Soumee said it was just full of malice.

Sreecheta repeatedly expressed her gratitude for all of us in her blog, appreciating the fact that our actions (we had decided not to let her be a part of the workshop with the lack of commitment on her part) have opened her eyes to the light she was unable to see. Bengalis I believe are good with words when it comes to sarcasm.

The rest of us kept busy. Kirti & Jubaraj discussing aperture, ISO & shutter speed. Ashok, Mainak & Soumee editing their blog posts.

Mr. Tanmay was their at 10.30. He started talking about Mainak's blog post. I had just read the first paragraph of his blog. Mr. Tanmay blasted him off with his usual benevolence and calm demeanor in place. He found Mainak's humour pretty distasteful. Mainak always tends to derive humour from a certain mockery.

We spent the first half making a small pin hole that can be mounted in our DSLR's. We made it out of the leftover black chart paper. We cut a circle out of them that would exactly fit the lens mount of the camera. We make a pin hole exactly at the centre. We fixed the pin hole on our DSLR's, doing away with our lenses. We spent the remaining of the pre-lunch session taking pictures with it. Upon checking the metadata for the photos, the strange thing was that the aperture was mentioned as f/00, as no lens was in place, and the focal length strangely was shown as 50 mm!! I do not know the reason for that though.

Man sitting
Shutter - 1/30, ISO - 800 on Cannon 600D

Anuj on the stairs.
Shutter - 1/30, ISO - 800 on Cannon 600D

Saurabh
Shutter - 1/30, ISO - 800 on Cannon 600D

Jubaraj with camera
Shutter - 1/30, ISO - 3200 on Cannon 600D

People in the Open Air Theatre
Shutter - 1/30, ISO - 800 on Cannon 600D

Cycles of gardeners
Shutter - 1/30, ISO - 800 on Cannon 600D

Trees by the path
Shutter - 1/30, ISO - 800 on Cannon 600D

So, having worked with the pin hole camera, we now start on trying to achieve brighter and sharper image. In the second half we mount magnifying glasses on a structure similar to the pin hole cameras we made two days ago.

We check it out and voila!! We are able to obtain a sharper image with the magnifying glass in place. And the aperture being big the brightness is also acceptable.

We try focusing on an object in a close proximity. The magnifying glass had to be placed further away from the eye piece for a sharp image.

Looking at an object in close proximity. Sharp focus at a distance.
Aperture - f/5.6, Shutter - 1/30, ISO - 800, focal length - 24mm on Cannon 60D

The image of the object in close proximity.
Aperture - f/5.6, Shutter - 1/30, ISO - 800, focal length - 29mm on Cannon 60D 

As the subject goes further away, the magnifying glass has to be pulled closer to the eye piece for sharp image.

The image of an object at distance.
Aperture - f/5.6, Shutter - 1/20, ISO - 800, focal length - 44mm on Cannon 60D

The focus is closer to the eye piece.
Aperture - f/5.6, Shutter - 1/20, ISO - 800, focal length - 20mm on Cannon 60D

We now try and look through different sizes of the opening. With a bigger aperture, the focus is shallow, as in this case it is just in the fore ground.

Foreground in focus with a wide opening.
Aperture - f/5.6, Shutter - 1/6, ISO - 1600, focal length - 48mm on Cannon 60D

With a smaller opening, the depth of the focus is greater, as in the following image both the foreground and background is in focus.

Both foreground & background in focus with a narrow opening.
Aperture - f/5.6, Shutter - 1/6, ISO - 1600, focal length - 67mm on Cannon 60D

But the above observation will hold water only if done with the same lens, but a different aperture opening. As I mentioned, we had used a different lens. A mistake on our part.

So when we move towards a subject we have to keep the subject in focus by gradually pushing the magnifying glass away from the eye piece. In the following pictures, we start from a distance and keep moving closer to the subject.

At a distance from the subject, focus is closer to the eye piece.
Aperture - f/5.6, Shutter - 1/10, ISO - 800, focal length - 25mm on Cannon 60D

The image has the least magnification at this distance.

The Image on the eye piece
Aperture - f/5.6, Shutter - 1/10, ISO - 2000, focal length - 57mm on Cannon 60D

Moving closer...

Moving closer to the subject, focus shifts away from the eye piece
Aperture - f/5.6, Shutter - 1/10, ISO - 800, focal length - 22mm on Cannon 60D

The magnification changes
Aperture - f/5.6, Shutter - 1/10, ISO - 2000, focal length - 57mm on Cannon 60D

Even closer...

Very close to the subject, with the focus further away from the eye piece.
Aperture - f/5.6, Shutter - 1/30, ISO - 800, focal length - 22mm on Cannon 60D

Magnification is greatest
Aperture - f/5.6, Shutter - 1/10, ISO - 2000, focal length - 36mm on Cannon 60D

We were working till 9 in the night before we called it a day.