HB 45 degree PME Prism Light Meter: can it be calibrated

[bags27]

I've noticed that recently the light meter on my prism is about 1.5 EVs too bright. I've checked it against my cell phone light meter and my spot meter, both of which accord.

I recently put in an Acute Matte D 42215 and maybe that let's in more light? I don't know if it's cause and effect because I also use my regular waist level finder and haven't kept tract.

Is there anyway to recalibrate the prism light meter, or do I just subtract 1.5 EVs everytime i use it?
thanks!

 

[Sirius Glass]

I've noticed that recently the light meter on my prism is about 1.5 EVs too bright. I've checked it against my cell phone light meter and my spot meter, both of which accord.

I recently put in an Acute Matte D 42215 and maybe that let's in more light? I don't know if it's cause and effect because I also use my regular waist level finder and haven't kept tract.

Is there anyway to recalibrate the prism light meter, or do I just subtract 1.5 EVs everytime i use it?
thanks!

I sent my 45 degree PME to Hasselblad with a Acute Matte D screen. The best that Hasselblad could calibrate the meter results in me needed to use half the ISO to have an accurate reading with the Acute Matte D screen.

 

[bags27]

I sent my 45 degree PME to Hasselblad with a Acute Matte D screen. The best that Hasselblad could calibrate the meter results in me needed to use half the ISO to have an accurate reading with the Acute Matte D screen.

Makes sense. That's the 1+ EV that I noticed. Thanks!

 

[Sirius Glass]

Another Photrio success story!

 

[bags27]

+1