Alex #1 (Delta 3,200 pushed to 12,500)

You aren't kidding about the old RFs in low light. 'Hard enough in good light.
12.5k? 'Didn't know it was possible. 'Grain isn't bad for that kind of push.

@HiHoSilver . Absolutely. They are tricky especially with faded patches in such old equipment. Yes 12,500 is very possible and a further stop to 25,000 might work too but I haven't tried. Grain is very obvious with a fine focus finder, in fact it is hard to find a gap in the image that isn't grain but somehow I still like the image.

I was watching a doucumentary about Jutland, the enormous WW1 naval battle. The presenter was trying to focus a WW1 British rangefinder on a ship 4,000 yards away. Even with static ships in calm conditions he was 200 yards out. At Jutland it was rough with poor visibility at over 20,000 yards. It is a wonder either side hit anything at all.