[[excellent... the system randomized my slide show of photos in their order.
Image #6 is one in spot, #3 is two in flood, #2&5 are four/five of the MR-16 flood with Fresnel lens.
Image #12 is six in flood, #6 is seven in spot, #13 & 11 is image eight & nine below described - the MR-16 spot with PC lens
Image #9 is image nine flood postition, #7 & 8 are in spot of the photos #10 of the line voltage 400G/FL lamp with image #1 below showing my bench focus technique - bench vise focused on a white screen.]]
Ok, went back and did another bench focus with photos. This time on my bench vise with a white drop 8' distant from it.
First in the photos is the
Fresnel lens PC fixture with Ushio 20w/12v 36 degree BAB lamp. Note, it can use a bit of adjustment to it's bench focus centering.
Flood was about 7' field angle with stridations and un-even beam. Spot was 4'-6" field angle which while spotty, a bit more even.
Second set was the PC lensed PC fixture with the same lamp. Note, as far as I can tell LCL of the lamp to the lens is 45 degrees. I don't know for sure what exact lens is in these units.
Flood was 5'-4" field angle with a hard edge to the beam within about three inches while in flood. Stridations of the
reflector seemed to for some unknown reason clear up as the lamp heated up. Field was fairly even and decent after it warmed up. Spot was 3'-6" and showed the stridations in a harsh way from the reflector lamp. Bench focus as far as alignment to the lens was also just a bit off but corrected I believe in the last photo.
Finally I wired up one of the origional 400G/FL lamps to the fixture and bench focused it. Seems as if this one was a bit out of alignment due to a serious double image I find curious. Beam was not able to get a tight bench focus hard edge and overall not so even or nice.
Flood measured 7'-0" and had stridations theoretically from the filament. Spot position while it had less stridations at 4'-6" was even more spotty in image by way of a total lack of flat field.
Still yet to try the 40 degree from GE and 60 degree BAB lamps out of Ushio, Osram and Philips. My theory is that given I only needed about 3" dia. more focus room for a good hard edge, the 40degree sounds promessing.
(TBA a report on my Kliegl Dynabeam. Service calling it at work to become working lobby sculpture. This has got to be one of the most cool follow spots I have ever worked on. Just wait until the photos of the flip out flood lens gets shown. Fascinating to an extreme. Flip out shield to cover the
iris etc. Working 3,000
Watt incandescent lamp that does not have a brand name but does have 4/1/68 written on it. This on a fixture that's of unknown date but someone signed the back of it as of 1963. Origional
gel - think it's Roscoline but could be a fore runner to that, and in absolute mint condition by way of working & paint. Just finished re-wiring it and cleaning the top half of it.)