Exposure Tables - the '36 Vintage

[David Hughes]

I found this in the little pocket at the back of an old ER case I bought for the IIIa but after the copper chlorate (?) etc muck had been removed they were still in a poor state. Also I'm none too sure about the colour as the dye from the leather is probably been leaching into it.

So the question is; has anyone a copy in better condition that they've scanned, please?

http://idrh.smugmug.com/photos/499924358_EJCEv-M.jpg
http://idrh.smugmug.com/photos/499924398_md8KZ-M.jpg

Secondly, did anything else go there?

By the way, I recently had a new cell fitted to an elderly Leicameter (Weston 650). If anyone's interested I'll come back and report on it...

Regards, David

 

[Solinar]

I wonder what the film speed would be in ISO - 10, 12, 25?

 

[Al Kaplan]

No mention at all about using a tripod with those slow shutter speeds!

 

[Solinar]

The brochure rates the DIN film between 8 and 11 depending on the type of development. So, I'll call it 10 in DIN - which is 2/3rds of stop faster than DIN 12.

DIN 12 and ISO 12 the same speed.

So to answer my own question - my guess is that the pamphlet is for B/W film with an ISO speed of between 6 and 8. Smokin-ly fast.

 

[David Hughes]

My other little book gives H&D 400 as ASA 12 or DIN/10 13 or Scheiner (European) 23°.

And H&D 800 as ASA 25 etc. I guess H&D 750 is nearly 800...

All good harmless fun.

Regards, David

 

[DriesI]

Look at the suggestion for open landscape in summer: 1/200 at F6.3

Summer would be 'Sunny 16'

F6.3 is 2 2/3 stops from F16.
2 2/3 stops from 1/200 is 1/30

Therefore the corresponding exposure would be 1/30 at F16.
Hence the film speed is likely around ISO25, which seems to confirm the previous post.