OR is it an UGLY DISH???
There is a lot of mythology and information about photographic lighting and lighting gear. Waht makes this more confusing is some of the nomenclature or nicknames we have placed on gear and lighting forms and styles.
So fellow lighting Mavins* and students, here's my take😁
As a commercial and portrait photographer I have accumulated many lights over the decades and still have quite an inventory of reflection of all those lights. The attached image shows only a small portion of these reflectors. I did not photogah all of my collection (hoard) because I fear for my health and safety in opening the door to that storage closet- I might be crushed- someday I'll reorganize it!
The theory or trend I am trying to dispel is that many photograher think that the softeness, hardness, concentration or diffusion, and many other properties of light are solely based on the use of specific pieces of gear. OK, I know an umbrella is not a spotlight but there are many techniques and nuances whereby various effects and be produced with one simple main light source. If you know some of the basic principles you will get more outof any given pieceof lighting gear and know how and when to change, use or employ any kind of photographic lighting apparatus and become savvier in using natural or existing light as well.
I know that t y'all artists hate rules but here are a few kinda rules of thumb that will no stimy anyone's creativity. and provide more lighting control.
SIZE: The Larger the size of the log source is in real to the size of the sub the softer the lighting effect. The smaller the harder!
DISTANCE- between the lig source and the subject. The close the softer the future the harder.
By moving the main light source closer and farther away from the subject and/ or by changing the size, you have lots of flexibility and variation of effect.
As per my experience as to the reflective surface of say a parabolic (metal) reflector, I find very little difference between a spun aluminum, satin, or pebbled surface finish perha just a bit more light output. The size and distance tables yied more noticeable changes. And all parabolic reflectors are not created equal, they can differ differe in depth.
TIME OUT FOR ANGEOF INCIDESNE. Folks think the angle of incidence is the angle at which the light from any given source strikes the subject in relation to the same position- that is true. It all applies to the angle at which the light is emitted by the flas tube, LED, quartz or incandescent lamp strips the inner surface of any reflector. the "facets of an umbrella, o or the inner surfaces of a softbox. Since the angle of incidents is equal to the angle of reflection, you can tell exactly where in the subject, the reflected beam of light will land and how it will record in the camera. Understanding control over the angle of incidence in terms of the posting of the main or light source in relati to the subject and camera enables fine control over the rendition of texture, specularity, and relative visual intensity.
Too much technobabble? OK, but as you turn on a couple of simple lights and move them around ll this theory will come t life and t y to will beg to SEE and previsualize your lighting, even before you release the shutter, and you will be able to recognize and utilize all kinds of ligh in natural lightg situations.
One more theory: FEATHERIG- A beam of light from a simple metal parabolic reflector has a hot spot that diminishes towards the edge of the beam. Rotating the ligh so that the EDGE of the beam, rather than the hot spot, illuminates the subject, there is a better rendition of texture, increasing secularity and evenness of light. The HOT SPOT has a function and seeing exactly where it is, is the key to good feathering.
All right, I can hear it now "Shapiro, for heaven's sake, what the hell does this have to do wi a BEAUTY DISH? I have been using a beauty dish since 1962, before they called it a " BEAUTY"-dish. I still have my 1950 s made "semi-psrabolic witt central deflector. But the beaut light can be an ugly light the light is ot applied with savvy. The central cap eliminates the hot spot so precise feathering is not practical and the effect is softer and somewhat lackluster as a result. The unt itself is big and ugly and utilizes a 100O watt (3200K) #4 Photoflood lamp. The beaut light will not automatically impart "beauty" on any given subject and the lighting may be lackluster unless you learn to control that central deflector- there are many differet nuances. Unless the surface is mirrorlike and highly polished the difference in effect between satin and stippled surface is minimal.
Y'all think this bad, wait till IIi writes about umbrellas softboxes, or the really hard boxes.
I really hope that this forum and this section become a place where we can discuss, analyze and share information and ideas about lighting. If there is interest I have lots of material to pitch in!
*An expert or authority (Yiddish)