Archive for April, 2016

Depth of field in camera lenses – Simplified

Friday, April 29th, 2016

f-stop-depth-of-field

 

Depth of field is the zone of acceptable sharpness within a photo that will appear in focus. In every picture there is a certain area of your image in front of, and behind the subject that will appear in focus.

This zone will differ from photo to photo. Some images may have very small zones of focus which is called shallow depth of field.

Others may have a very large zone of focus which is called deep depth of field.

3 main factors that will affect how you control the depth of field of your images are:

aperture (f-stop),

distance from the subject to the camera, and

focal length of the lens on your camera.

Photography Image Size for good quality printing – Simplified

Thursday, April 28th, 2016

Most of the times the printers requests photos in dpi (dots per inch) whereas most cameras shoot in mega pixels. We have offered an easy calculation for calculating dpi from megapixels

Convert pixels to dpi Output to Monitors/Printers)

Formula: Pixels ÷ DPI = image size width X height (in inches)

Convert inches to Pixels (Input from Scanners)

Formula: width (in inches) X height (inches) X DPI = Pixels

For example of the image size required is 40 inches X 30 inches at 300 dpi than the megapixel on the camera required would be

40 X 30 X 300 = 360000 pixles (or 3.6 mega pixels)

details sourced from : http://auctionrepair.com/pixels.html

 

Using Snoot for Photography – Simplified

Tuesday, April 5th, 2016

         CowboyStudio-JTL-Photo-Studio-Snoot-for-Strobe-Flash-0

What is a snoot ? A snoot is a tube that fits over a strobe or studio light to direct the light in a focused are and prevents light spill from getting into your shadows. How does a snoot help ?                                                                                         Bare-Bulb-vs-Snoot

  1. You get a small area of coverage
  2. less light spill, and
  3.  more defined edges in the light

 

 

What is the difference between using a snoot and a grid ? Using a snoot gives a harsher or harder light, adding a lot of contrast on your subject. When using a grid, the light is softer. A grid allows the light to bounce around, meaning your light is coming from multiple places, whereas a snoot directs the light without allowing it to bounce.