Watt-Seconds or Guide Number? I am a student of photography. When using studio flashguns, I notice that photographers use the term ‘Watt-Seconds” to denote the power of a flashgun. At the same time, I have also noticed that the power of a flashgun is mentioned as Guide Number. Which is right and which is wrong? G. S. Ambekar, Nagpur Neither is actually wrong but I prefer to … [Read more...]
Table-Top
Smart Photography reader Ullas George from Cochin, Kerala, sent us this photo of a glass bottle and wine glass. For the benefit of other SP readers, we asked him to let us have the lighting diagram, which could help others to try and experiment with similar products. |SP Rohinton Mehta … [Read more...]
Ask Uncle Ronnie -March 2017
A Mixed Bag During the days of film photography, we used to get film with various ASA (50, 100, 125, 200, 400 etc) and we used to adjust the aperture and the shutter speed, depending on the lighting situation. 1) We were able to take pictures of moving subjects (like birds etc) at shutter speeds of 1/125sec or 1/250sec at apertures like f16 or f/11. 2) We could change the … [Read more...]
Image Editing – PART 4
Let’s first recap what we learned in the earlier issues about image editing: Part 1: How to set-up Photoshop for optimum performance (December 2016) Part 2: Setting the optimum screen resolution on your computer; What are you looking for from Photoshop?; Using ‘Levels’ the wrong way; using ‘Levels’ the right way; The Tool Box; Using the Ruler Tool to straighten tilted horizon … [Read more...]
Ask Uncle Ronnie – February 2017
Flat-field lenses Sorry if this has been asked before but I am a newcomer to photography. I have just started to pursue wedding photography. What are flat-field lenses and how do they differ from ‘normal’ lenses? Is there any advantage of one over the other? Please explain in very simple terms because I am not technically minded. S. R. Sardesai, Amravati Since you are … [Read more...]
