What is the Hasselblad "exposure test plate", and how does it work?

[markaudacity]

It's mentioned in the D-Flash manual as a way to check exposure without wasting film. There are no pictures nor discussion of it that Google or Kagi can find, which is wild, and I can't imagine how it would work.

Does anyone know anything about this thing, or even better, have pictures?

 

[John Wiegerink]

It's mentioned in the D-Flash manual as a way to check exposure without wasting film. There are no pictures nor discussion of it that Google or Kagi can find, which is wild, and I can't imagine how it would work.

Does anyone know anything about this thing, or even better, have pictures?

I never heard of this, but I'm sure somebody here will chime in. I'm now a little curious myself.

 

[mshchem]

It's a body back cover with a gray finish for testing the TTL flash before actually exposing the film. Like a 18% reflectance test card

 

[mshchem]

 

[mshchem]

Hasselblad Camera Body Rear Cover New | eBay

Remove the magazine/focusing screen adapter. Vignetting can be caused by incorrectly positioned or adjusted accessories such as lens shades,filter holders,etc.It can also occur when shifting the lens as with the FlexBody or the PC-Mutar 1.4X Shift Converter,for example.Vignetting with the...

www.ebay.com

 

[mshchem]

Just noticed this is a knock off copy

 

[mshchem]

The original item

 

[markaudacity]

Wild. So it’s just a test target for the OTF sensor. I was imagining you somehow looked through it.

 

[mshchem]

Wild. So it’s just a test target for the OTF sensor. I was imagining you somehow looked through it.

I always wondered if this would match up to actual film. This would sure help if you were doing some sort of macro work. Probably would need fancier flash. The flash is almost certainly Sunpak, it's a nice flash, I never use (but I'm ready!)

 

[RalphLambrecht]

View attachment 413866

I don't understand what do you do with it. what is it for? Why not use a Kodak GrayCard?

 

[Don_ih]

I never use

You may have too much stuff....

I don't understand what do you do with it.

Neither do I.

I guess you need the right viewfinder.

 

[itsdoable]

It is for TTL flash exposure testing. The grey is the same reflectance as film. With TTL film, the sensor in the body measures the flash reflecting off the film during exposure, and shuts off the flash when the correct amount of light has been detected. To avoid exposing film for testing, you put of the body cap. An all black body cap would not reflect the correct amount of light, so the exposure would be more.

You can tape some grey material to your existing body cap to do the same thing.