"What we've got here is failure to communicate. Some men you just can't reach." - Strother Martin
Posted 26 January 2013 - 07:35 AM
It's not a 'camera filter', it's an old stationary darkroom filter, for making prints (i.e. color correction - if it was too magenta, you'd filter it with a strong green filter). Trust me, I used to do this for a living before digital came out.
I only floccinaucinihilipilificate
when it IS worthless..
Posted 26 January 2013 - 08:58 AM
It definitely looks like a camera filter to me - green is a very useful filter when shooting black and white. Older cameras (like TLR's and as you said movie cameras) often had relatively small lens filter fittings of around 30mm diameter, with proprietary fittings so you had to buy that camera's accessories.. They also frequently came in a leather pouch as per the Rollei example given - I would have thought that was more likely an indication of some degree of portability - I think camera is most likely, telescope second, enlarger third.
A museum or elderly camera store owner might be your best shot to help identify it, or maybe browse some antique camera forums..
___ All my posts about Apollo are dedicated to the memory of MID - who knew, lived and was an integral part of, Apollo.
Courage is being scared to death but saddling up anyway-John Wayne
Posted 28 January 2013 - 01:00 AM
At first I thought telescope for looking at the sun but my sun filters are much darker than that. Maybe for the moon because it can be very bright especially with a larger telescope and if you have light sensitive eyes you might use one. It could also be for a old camera or binoculars.