AtoZ Challenge: The Glossary

The AtoZ Challenge has already come to an end for the second time, and as a result, now a glossary of the terms can be made. I believe this shall come handy for future references!

A – Aperture, Artificial Horizon

B – Bulb Mode, Bokeh

C – Colour Temperature, Composition

D – Double Exposure , Depth of Field

E – EXIF Data, Exposure Bracketing

F – Forced Perspective, Focus Stacking

G – Ghosting, Grain

H – Hot Shoe, Hyperfocal Distance

I – Infinity Focus, ISO

J – Juxtapose, JPEG vs RAW

K – Keylight, Kelvin

L – Latitude, Lens Distortion

M – Manual Mode, Macro

N – Normal Lens, Noise Reduction

O – Optical Zoom, Overexposure

P – Panning, Post Processing

Q – Quality, Quiet Release

R – Red Eye Reduction, Rear Curtain

S – Spot Metering, Shutter Speed

T – Tonal Range, TTL Metering

U – Urban Landscape, Underexposure

V – Vignetting, Vibration Reduction

W – Watermark, White Balance

X – X Speed, X Process

Y – Your Rapport, You

Z – Zoom (Digital), Zoom Burst

Have a look at these terms and let me know if I ought to add some to the list.

Cheers!!

AtoZ Challenge: O – Optical Zoom

Optical Zoom

Zoom can be described as to close in on your subject. In a camera, it can be achieved in mainly three different ways.

The first one is the basic one, which involves the photographer moving close to the subject.
The second type of zoom is what we are going to talk about here today, optical zoom. It is when the lens within the barrel actually moves to change the focal length and hence zoom. This change in focal length causes the subject to appear closer or farther away depending on the use. Image quality does not degrade while using optical zoom.

The images below show the use of optical zoom. The viewpoint has not changed, just the focal length has changed from about 55mm to 180/200mm.

Optical zoom, trains, Dudhsagar

At the far end, Trains, Dudhsagar

The third type is the digital zoom. This is where the camera, using its own algorithms, zooms in on the image. It has the previously captured image to begin with and then works on it. The photo quality degrades and after a certain point, it begins to pixellate.

So, dear readers, if you are buying a new point and shoot camera, it is always the optical zoom that you should pay heed to.

Last time, O was for Overexposure.

Cheers!

April AtoZ Challenge: PH – O: Overexposure

for Over-Exposure

By definition, Overexposure is a condition when the photo receives more light than it should have. Causes, slower shutter speed or wide open aperture or high ISO. Effects include excessive highlights and washed out details. Some bits of the photos are recoverable, given they have been shot in RAW format (for comparison with JPEG, check here), but often, complete recovery is not possible and some compromises are done. Exposure compensation is an in body technique to control exposure issues, else, we depend on the post processing to sort things out.

 DSC_1771-1  DSC_1771-1-2

This is a part of April AtoZ Challenge. A to N can be found here.

Cheers!!