In other words, 10 elevated to the 0.30 power. The f/stop number set is based on a delta of 2x meaning the next value in the number set increases the exposure by doubling the amount of light energy playing on film or digital chip. I hope the thoughts above (and others that have posted) will get you unwrapped from around the axle. Such topics such as 1/10th of a stop will do exactly that. It basically means when one gets confused to the point of paralysis. There is an expression I have heard and used called "Getting wrapped around the axle". So unless you know you have calibrated and matched exposure values between the digiski and your camera (or laboratory equipment), set the readout to 1/3 stop and just use those values and ignore the measured correction value. Just look on the ISO camera manufacturing settings vs the actual measured ISO values at The typical DSLR is typically only within 1/2 stop of accuracy relative to an absolute light measurement. There is an assumption that the measured value on the digisky can be accurately duplicated on the camera. The fractions in 0.1 amounts is the measured correction value to show where you stand in between the stop values.Įxciting for those with the analytic persoanity and very frustrating to those that want to follow instructions to the letter yet can't figure out how to do 1/10 stops on the camera yet the accuracy is way beyond of what you can set accurately or tell in the end result image you take. The disiky can be set to display in 1/1, 1/2, or 1/3 stops. I suppose using the inverse square law, and a point source of light, one could calculate 1/10 stops using the distance of the light source to the subject. Where one can get fairly precise 1/10 stop change is when using professional studio strobe lighting equipment with digital control over the output such as those made from Broncolor. ![]() In old style large format lenses/shutters, with infinitely variable aperture adjustment, one could get close to a 1/10 although, being a mechanical device, a 1/6th was more achievable with any precision. I can't think of any that resolves that finely but there could be. That would depend on the resolution capabilities of the auto exposure algorithms used in the camera. However in some cameras, in Aperture priority auto mode-you set the aperture and the camera selects the shutter speed-may be able to set infinite "in between" speeds on it's own. Most standard DSLR's won't give you the ability to control exposure in 1/10th stops. If I can't set the aperture in tenths of a stop, how can I set ISOs and shutter speeds in tenths of a stop? What is one tenth of a stop higher from 1/125? It's probably something silly, but I can't figure it out right now and I just need the equation and I'm all set. I know cameras work in thirds of a stop, but just for example. Which, I presume, means 2 tenths of a stop higher. It shows ƒ/11 and 1/125 shutter speed for ISO 100. Regarding this, for example:īecause here's another problem for example. If only I had a complete guide to the mathematics of photography I could do a few things easily. ![]() For me it's not a problem to do the maths, square roots and logarithms and stuff.
0 Comments
Leave a Reply. |