I use a Z220 and a Z220S together on my PT015, I purchased them for use with Nikonos V and with Housed Film Camera's, the focus light / Laser is a bit of a pain, as they come on in high ambient light conditions - if the Optic fibre cap is off for slave shooting. When it is darker (when you need the light) it doesn't work.
For the Nikonos V and Housed film camera, it sounds like your strobe is set to "Optical & Slave" not "Wire". Try setting the Main Switch to "Wire" according to instructions below.
On the PT015, nothing (on the housing) will make the focus light/ laser work! So the Z220S is your best bet. If you buy a DSLR down the track, you will probably want the Z220 as the lights work on Nikon/Canon Digitals (Focus Light / Laser turns on when shutter is half depressed and off when shutter is fully depressed)
Yes, Target Laser / Focus Light will not function on many digital cameras. So Z-220S, D-180 or D-180S would be better choice.
-Mark / Inon
www.inonamerica.com
Reference:
Z-220 Connection Methods, Focus Light & Target Laser Settings with film cameras/housings having Nikon TTL circuitry:
Connection methods:
1) Electrical - Sea & Sea “Sync Cord N”
2) Fiber Optic (with Inon X1 and X2 series housings with optical connectors)
Z-220 Settings when using “Sync Cord N” electrical method on film camera housing systems:
Set Z-220 Main Switch to “Wire” (not “Optical & Slave” which is for fiber optic connections with Inon housings). In this position, on the switch’s opposite side, there are “A” and “X” settings.
Combination of “Wire” and “A” settings will allow automatic on/off Focus Light and Target Laser activation at half shutter press.
Combination of “Wire” and “X” settings will prevent Focus Light from activating. To block the Target Laser just flip the little shade over the laser window.
Note: If the Z-220 is set to “Optical & Slave” the Z-220’s light sensor will sense ambient light (in place of the fiber optic supplied light it was intended to) and intermittently activate the Focus Light and Target Laser. When the ambient light decreases to a level below the sensor’s sensitivity, the Focus Light and Target Laser will not be activated. Therefore, Inon does not recommend the “Optical & Slave” setting on non-Inon housings for reasons of practicality.
Note on digital cameras:
Currently, the Z-220 and Z-220S function only as Manual Strobes with digital cameras. “TTL” is not possible.
The Z-220 Focus Light and Target Laser do not function with all digital camera / housing configurations. There has been some reported success with some housings with D100 and S2 cameras.